# Index of philosophy articles (I–Q)

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Philosophers
Aesthetic philosophers
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Philosophers of mind
Social and political philosophers
Women in philosophy :
vte :
* A–C
* D–H
* I–Q
* R–Z

## I

* I'm entitled to my opinion
* I-Ching
* I Am a Strange Loop
* I and Thou
* I Ching
* I Heart Huckabees
* I Hope I Shall Arrive Soon
* I know it when I see it
* I know that I know nothing
* I problemi della guerra e le vie della pace
* I. A. Richards
* Iain Hamilton Grant
* Iamblichus
* Iamblichus (philosopher)
* Ian Bone
* Ian Buchanan (philosopher)
* Ian Hacking
* Ian Ramsey
* Ian Robinson (rationalist)
* Ian Thomas Ramsey
* Iatrogenesis
* Ibn al-Arabi
* Ibn al-Nafis
* Ibn al-Rawandi
* Ibn ar-Rawandi
* Ibn Arabi
* Ibn Bajjah
* Ibn Daud
* Ibn Falaquera
* Ibn Gabirol
* Ibn Hazm
* Ibn Kammuna
* Ibn Khaldun
* Ibn Khaldūn
* Ibn Masarra
* Ibn Masarrah
* Ibn Miskawayh
* Ibn Rushd
* Ibn Sabin
* Ibn Sina
* Ibn Sīnā
* Ibn Taymiya
* Ibn Taymiyyah
* Ibn Tufail
* Ibn Ţufayl
* Ibn Tzaddik
* İbrahim Hakkı Erzurumi
* İbrahim Özdemir
* Ichthyas
* Icon
* Id, ego and super-ego
* Ida Mett
* Idea
* Idea for a Universal History with a Cosmopolitan Purpose
* Idea of Progress
* Ideal (ethics)
* Ideal language
* Ideal observer theory
* Ideal speech situation
* Ideal type
* Idealism
* Idealistic pluralism
* Idealistic Studies
* Idealization (science philosophy)
* Idea
* Ideas and Action
* Ideas Have Consequences
* Idée reçue
* Idempotency of entailment
* Identity (philosophy)
* Identity formation
* Identity of indiscernibles
* Identity politics
* Identity theory of mind
* Identity thesis
* Identityism
* Ideographic
* Ideological repression
* Ideology
* Ideomotor effect
* Idiolect
* Idios kosmos
* Idol (philosophy)
* Idolon tribus
* Idols of the cave
* Idols of the mind
* Idols of the tribe
* Idomeneus of Lampsacus
* Ietsism
* If
* If-by-whiskey
* If a tree falls in a forest
* If and only if
* Iff
* Ignacio de Arbieto
* Ignacio Ellacuría
* Ignoramus et ignorabimus
* Ignoratio elenchi
* Ignosticism
* Ignotum per ignotius
* Igor Pribac
* Igor Yefimov
* Ihsan
* Ikeda Mitsumasa
* Iki (aesthetic ideal)
* Ikki Kita
* Ilkka Niiniluoto
* Illative
* Illegalism
* Illicit major
* Illicit minor
* Illocutionary act
* Illocutionary force
* Illtyd Trethowan
* Illuminati
* Illumination
* Illuminationism
* Illuminationist philosophy
* Illusion
* Illusion of asymmetric insight
* Illusion of control
* Illusion of transparency
* Illusionism (philosophy)
* Illusions
* Illusory correlation
* Illustrius Pusaeus
* Image
* Imagery
* Imaginary
* Imaginary Conversations
* Imagination
* Immaculate perception
* Immanence
* Immanent critique
* Immanent evaluation
* Immanuel Ben Solomon of Rome
* Immanuel Hermann Fichte
* Immanuel Kant
* Immanuel the Roman
* Immaterial
* Immaterial force
* Immaterialism
* Immediacy (philosophy)
* Immediate inference
* Immediatism
* Immigration Act of 1917
* Immortality
* Immortality of the soul
* Immunology
* Immutability
* Impact bias
* Impartiality
* Impenetrability
* Imperative
* Imperative logic
* Imperfect induction
* Imperialism
* Imperium
* Impermanence
* Implicant
* Implication
* Implications of nanotechnology
* Implicature
* Imposition
* Impossible world
* Impredicative definition
* Impredicative property
* Impredicativity
* Impression
* Imre Lakatos
* In a Different Voice
* In Defense of Anarchism
* In Praise of Shadows
* In Search of Lost Time
* In Search of the Miraculous
* In vitro fertilisation
* Incarnation and Christology
* Incarnational humanism
* Inclusion (logic)
* Inclusive Democracy
* Inclusive disjunction
* Incoherence
* Incompatibilism
* Incompatible-properties argument
* Incomplete comparison
* Incompleteness
* Incompleteness theorem
* Incompleteness theorems
* Inconnu Independent Art Group
* Inconsistent triad
* Incontinence (philosophy)
* Incorporeality
* Incorrigibility
* Indefinite monism
* Independence
* Independence-friendly logic
* Indeterminacy
* Indeterminacy (philosophy)
* Indeterminacy debate in legal theory
* Indeterminacy of translation
* Indeterminacy principle
* Indeterminacy problem
* Indeterminate
* Indeterminism
* Index of aesthetics articles
* Index of ancient philosophy articles
* Index of epistemology articles
* Index of ethics articles
* Index of logic articles
* Index of metaphysics articles
* Index of philosophers
* Index of philosophy
* Index of philosophy articles
* Index of philosophy articles (A–C)
* Index of philosophy articles (D–H)
* Index of philosophy articles (R–Z)
* Index of philosophy of mind articles
* Index of social and political philosophy articles
* Indexed language
* Indexical
* Indexicality
* Indexicals
* Indian philosophy
* Indian political philosophy
* Indicative conditional
* Indicative conditionals
* Indicator
* Indifference
* Indifferent act
* Indigenism
* Indirect proof
* Indirect self-reference
* Indiscernibility
* Individual
* Individual reclamation
* Individualism
* Individualism and Economic Order
* Individualist anarchism
* Individualist ethical subjectivism
* Individuation
* Indo-European copula
* Indoctrination
* Indonesian philosophy
* Indra Sen
* Indriya
* Inductionism
* Inductive definition
* Inductive inference
* Inductive reasoning
* Inductivism
* Industrial espionage
* Industrialisation
* Ineffability
* Ineffective assistance of counsel
* Inequality
* Inequality Reexamined
* Infallibilism
* Infallibility
* Inference
* Inference rule
* Inference to the best explanation
* Inferential role semantics
* Infinitary logic
* Infinitary logics
* Infinite
* Infinite divisibility
* Infinite qualitative distinction
* Infinite regress
* Infinitesimals
* Infinitism
* Infinity
* Infinity (philosophy)
* Influence and reception of Friedrich Nietzsche
* Informal fallacy
* Informal logic
* Informal mathematics
* Information bias (psychology)
* Information ethics
* Information theory
* Informed consent
* Informed refusal
* Infoshop
* Infoshop.org
* Ingeborg Bachmann
* Ingeborg i Mjärhult
* Ingo Zechner
* Ingroup bias
* Ingsoc
* Inherence
* Inherence relation
* Inherent
* Inherent value
* Inherently funny word
* Iniciales
* Inka
* Innate idea
* Innate ideas
* Innate knowledge
* Innatism
* Inne pieśni
* Inner peace
* Innocence
* Inocenc Arnošt Bláha
* Inoue Tetsujirō
* Inquiry
* Inside Front
* Insight
* Insolubilia
* Instantiation
* Instantiation principle
* Institute for Anarchist Studies
* Institute for Ethics and Emerging Technologies
* Institute for the Secularisation of Islamic Society
* Institute of Pacific Relations
* Institution
* Institutional Critique
* Institutional cruelty
* Institutional theory of art
* Institutionalism
* Instrumental conditioning
* Instrumental rationality
* Instrumental value
* Instrumentalism
* Insufficient reason
* Insurrectionary anarchism
* Integral theory (Ken Wilber)
* Integral humanism (India)
* Integral humanism (Maritain)
* Integrative level
* Integrity
* Intellectual
* Intellectual dishonesty
* Intellectual history
* Intellectual responsibility
* Intellectual virtue
* Intellectualism
* Intelligence
* Intelligence (trait)
* Intelligent design
* Intelligent design theory
* Intelligibility (philosophy)
* Intelligible form
* Intended interpretation
* Intension
* Intensional definition
* Intensional logic
* Intensional statement
* Intensionality
* Intensive Science and Virtual Philosophy
* Intention
* Intentional fallacy
* Intentional Logic
* Intentional object
* Intentional stance
* Intentionality
* Interactionism
* Interactionism (philosophy of mind)
* Interculturalism
* Interdependence
* Interests
* Intergenerational equity
* Intergenerational justice
* Interior algebra
* Internal discourse
* Internal realism
* Internalism
* Internalism and externalism
* Internalization
* International Academy of Humanism
* International Anarchist Congress of Amsterdam
* International Association for Computing and Philosophy
* International Association for Philosophy of Law and Social Philosophy
* International Commission of Jurists
* International Conference of Rome for the Social Defense Against Anarchists
* International Federation of Philosophical Societies
* International Journal of Baudrillard Studies
* International Journal of Žižek Studies
* International law
* International League of Humanists
* International Network of Engineers and Scientists for Global Responsibility
* International of Anarchist Federations
* International Philosophical Quarterly
* International Philosophy Day
* International Philosophy Olympiad
* International relations
* International Society for Philosophy of Music Education
* Internet Encyclopedia of Philosophy
* Internet ethics
* Internet research ethics
* Interoception
* Interpellation
* Interpretability
* Interpretability logic
* Interpretant
* Interpretation (aesthetics)
* Interpretation (logic)
* Interpretation of quantum mechanics
* Interpretive system
* Interpretivism (legal)
* Interregnum
* Intersection
* Intersubjective
* Intersubjective verifiability
* Intersubjectivity
* Intertheoretic reduction
* Interval scale
* Intervening variable
* Intisar-ul-Haque
* Intrinsic and extrinsic properties
* Intrinsic and extrinsic properties (philosophy)
* Intrinsic finality
* Intrinsic good
* Intrinsic properties
* Intrinsic property
* Intrinsic value
* Intrinsic value (animal ethics)
* Intrinsic value (ethics)
* Introduction to Arithmetic
* Introduction to Kant's Anthropology
* Introduction to Mathematical Philosophy
* Introduction to Metaphysics
* Introduction to Objectivist Epistemology
* Introjection
* Introspection
* Introspection illusion
* Intuition (Bergson)
* Intuition (knowledge)
* Intuition (philosophy)
* Intuition pump
* Intuitionism
* Intuitionism in ethics
* Intuitionist logic
* Intuitionistic logic
* Inverse (logic)
* Inverse gambler's fallacy
* Inversion
* Inverted qualia
* Inverted spectrum
* Invincible error
* Invincible ignorance fallacy
* Inviolability
* Invisible dictatorship
* Invisible hand
* Invisible Pink Unicorn
* Involuntary commitment
* Involuntary euthanasia
* Involuntary memory
* Involuntary treatment
* Involution (esoterism)
* Involution (philosophy)
* Ioan Zalomit
* Ioane Petritsi
* Ioanna Kucuradi
* Ion (dialogue)
* Ion Heliade Rădulescu
* Ion of Chios
* Ion Petrovici
* Ionian Enlightenment
* Ionian School (philosophy)
* Iosipos Moisiodax
* Ippen
* Ipso facto
* Ipso jure
* Iranian philosophy
* Irenaean theodicy
* Irenicism
* Iris Marion Young
* Iris Murdoch
* Ironism
* Irony
* Irrational Man: A Study in Existential Philosophy
* Irrationalism
* Irrationalism and aestheticism
* Irrationality
* Irrealism (philosophy)
* Irrealism (the arts)
* Irreducibility
* Irreflexive
* Irrelevant conclusion
* Irreligion
* Irresistible force paradox
* Irreversibility
* Irving Copi
* Irving Singer
* Irving Thalberg Jr.
* Irwin Edman
* Is-ought distinction
* Is-ought problem
* Is–ought problem
* Is and ought
* Is God Dead?
* Is Logic Empirical?
* Is ought problem
* Is the glass half empty or half full?
* Isaac Abrabanel
* Isaac Abravanel
* Isaac Beeckman
* Isaac ben Joseph ibn Pulgar
* Isaac ben Moses Arama
* Isaac de Pinto
* Isaac Israeli
* Isaac Israeli ben Solomon
* Isaac La Peyrère
* Isaac Levi
* Isaac Newton
* Isaac of Stella
* Isaac of Troki
* Isaac Passy
* Isaac Puente
* Isaak Benrubi
* Isaak Iselin
* Isabel Paterson
* Isabelle Stengers
* Isagoge
* Isaiah Berlin
* Isidore of Alexandria
* Islam and democracy
* Islamic capitalism
* Islamic ethics
* Islamic fundamentalism
* Islamic fundamentalism in Iran
* Islamic metaphysics
* Islamic Modernism
* Islamic philosophy
* Islamic theology
* Islamization of knowledge
* Ismail al-Faruqi
* Isocrates
* Isomorphism
* Isonomia
* Isotta Nogarola
* Issac La Peyrere
* Issac La Peyrère
* Issues in anarchism
* Isvarakrsna
* Italian Fascism
* Italian philosophy
* Iterative hierarchy
* Ito Jinsai
* Itō Jinsai
* Itsuo Tsuda
* Ivan Aguéli
* Ivan Aleksandrovich Il'in
* Ivan Chtcheglov
* Ivan Ilyin
* Ivan Kireyevsky
* Ivan Orlov (philosopher)
* Ivan Sviták
* Ivan Vyshenskyi
* Ivar Matlaus
* Ivar Mortensson-Egnund
* Ivo Urbančič
* Iyyun

## J

* J. B. Schneewind
* J. Baird Callicott
* J. Barkley Rosser
* J. David Velleman
* J. J. C. Smart
* J. L. Ackrill
* J. L. Austin
* J. L. Mackie
* J. M. E. McTaggart
* J. M. Hinton (philosopher)
* J. O. Urmson
* J. P. Moreland
* J. P. Stern
* J. Paul Reddam
* J. W. R. Dedekind
* J. B. Schneewind
* J. D. Trout
* J. J. C. Smart
* J. W. R. Dedekind
* Ja'far Kashfi
* Jaakko Hintikka
* Jaan Kaplinski
* Jaap Kruithof
* Jacek Salij
* Jack Copeland
* Jack Meiland
* Jack of Diamonds (artists)
* Jack Russell Weinstein
* Jack Smart
* Jack White (trade unionist)
* Jacksonian democracy
* Jacob Acontius
* Jacob ben Nissim
* Jacob Burckhardt
* Jacob Freudenthal
* Jacob Friedrich Fries
* Jacob Friedrich von Abel
* Jacob Golomb
* Jacob Gould Schurman
* Jacob Klapwijk
* Jacob Klein (philosopher)
* Jacob Lorhard
* Jacob Needleman
* Jacobus Arminius
* Jacobus Naveros
* Jacopo Mazzoni
* Jacopo Zabarella
* Jacques-André Naigeon
* Jacques Barzun
* Jacques Bidet
* Jacques Bouveresse
* Jacques Chevalier
* Jacques Derrida
* Jacques Derrida bibliography
* Jacques Ellul
* Jacques Herbrand
* Jacques Lacan
* Jacques Maritain
* Jacques Rancière
* Jacques Rohault
* Jad Hatem
* Jaegwon Kim
* Jaime Balmes
* Jaime Giménez Arbe
* Jaimini
* Jain cosmology
* Jain philosophy
* Jaina philosophy
* Jainism
* Jakob Böhme
* Jakob Friedrich Fries
* Jakob Frohschammer
* Jakob Guttmann (rabbi)
* Jakob Klatzkin
* Jakob Lorber
* Jakob Sigismund Beck
* Jakob Thomasius
* Jakub Górski
* Jakub of Gostynin
* Jamasp
* James-Lange theory
* James-Lange theory of the emotions
* James Allen Graff
* James Beattie (writer)
* James Bissett Pratt
* James Brusseau
* James Bryce, 1st Viscount Bryce
* James Burnett, Lord Monboddo
* James Childress
* James Clerk Maxwell
* James Creed Meredith
* James DiGiovanna
* James Dunbar (writer)
* James E. Faulconer
* James Earl Baumgartner
* James Edwin Creighton
* James F. Conant
* James Ferrier
* James Franklin (philosopher)
* James Frederick Ferrier
* James G. Lennox
* James Griffin (philosopher)
* James Guillaume
* James Gustafson
* James Hall (philosopher)
* James Harrington
* James Harrington (author)
* James Hayden Tufts
* James Heisig
* James Hutchison Stirling
* James Hutton
* James L. Walker
* James M. Edie
* James MacKaye
* James Main Dixon
* James Mark Baldwin
* James Martin (philosopher)
* James Martineau
* James Mathias Fennelly
* James McCosh
* James Mill
* James of Viterbo
* James Otteson
* Jim Flynn
* James R. Griesemer
* James Rachels
* James Robb (philosopher)
* James Robert Brown
* James Tully (philosopher)
* James Ward (psychologist)
* Jamgon Ju Mipham Gyatso
* Jamie Whyte
* Jamil Sidqi al-Zahawi
* Jan Amos Komensky
* Jan Amos Komenský
* Jan Deutsch
* Jan Hus
* Jan Lukasiewicz
* Jan Łukasiewicz
* Jan Mukařovský
* Jan Narveson
* Jan of Stobnica
* Jan Patocka
* Jan Patočka
* Jan Pinborg
* Jan Sniadecki
* Jan Śniadecki
* Jan Sokol (philosopher)
* Jan Szylling
* Jan Wacław Machajski
* Jan Westerhoff
* Jan Woleński
* Jan Zwicky
* Jane Jacobs
* Janet Biehl
* Janet Coleman
* Janet McCracken
* Janet Radcliffe Richards
* Janko Prunk
* János Kis
* Jansenism
* Janus: A Summing Up
* Japanese aesthetics
* Japanese Anarchist Federation
* Japanese philosophy
* Japanese sound symbolism
* Jaroslav Peregrin
* Jason McQuinn
* Jason of Nysa
* Jason Stanley
* Jason Walter Brown
* Jaundice
* Javad Tabatabaei
* Javelin argument
* Javid Nama
* Jawaharlal Nehru
* Jay Newman
* Jay Rosenberg
* Jayanta Bhatta
* Jayarāśi Bhaṭṭa
* Jayatirtha
* Je Tsongkhapa
* Jealousy
* Jean-Baptiste Lamarck
* Jean-Francois Lyotard
* Jean-François Lyotard
* Jean-François Mattéi
* Jean-François Revel
* Jean-François Senault
* Jean-Gaspard Felix Lacher Ravaisson-Mollien
* Jean-Gaspard Félix Lacher Ravaisson-Mollien
* Jean-Jacques Pelletier
* Jean-Jacques Rousseau
* Jean-Louis Calandrini
* Jean-Louis de Lolme
* Jean-Louis Le Moigne
* Jean-Luc Marion
* Jean-Luc Nancy
* Jean-Marc Ferry
* Jean-Marie Guyau
* Jean-Michel Berthelot
* Jean-Paul Audet
* Jean-Paul Sartre
* Jean-Pierre de Crousaz
* Jean-Pierre Faye
* Jean-Pierre Voyer
* Jean-Yves Béziau
* Jean-Yves Girard
* Jean Anthelme Brillat-Savarin
* Jean Baudrillard
* Jean Beaufret
* Jean Bethke Elshtain
* Jean Biès
* Jean Bodin
* Jean Borella
* Jean Bourdeau
* Jean Buridan
* Jean C. Baudet
* Jean Capréolus
* Jean Cavaillès
* Jean Clam
* Jean Curthoys
* Jean de Gerson
* Jean de Silhon
* Jean Elizabeth Hampton
* Jean François de Saint-Lambert
* Jean Gerson
* Jean Grenier
* Jean Guitton
* Jean Hyppolite
* Jean le Rond d'Alembert
* Jean Le Rond d'Alembert
* Jean Leclerc (theologian)
* Jean Meslier
* Jean Nicod
* Jean Nicod Prize
* Jean Philibert Damiron
* Jean Piaget
* Jean Reynaud
* Jean Van Heijenoort
* Jean Wahl
* Jeanne Hersch
* Jedaiah ben Abraham Bedersi
* Jeff Malpas
* Jeff McMahan (philosopher)
* Jeff Monson
* Jeff Paris
* Jeffersonian democracy
* Jeffersonian political philosophy
* Jeffrey Nielsen
* Jen
* Jena romantics
* Jennifer Hornsby
* Jenny Teichman
* Jens Kraft
* Jens Staubrand
* Jeong Do-jeon
* Jeong Yak-yong
* Jeremy Bentham
* Jeremy Butterfield
* Jeremy Waldron
* Jeremy Weate
* Jeroen Groenendijk
* Jerome Frank
* Jerome Frank (lawyer)
* Jerome Ravetz
* Jerrold Katz
* Jerrold Levinson
* Jerry A. Fodor
* Jerry Alan Fodor
* Jerry Farber
* Jerry Fodor
* Jerry Fodor on mental architecture
* Jerry Fodor on mental states
* Jerusalem (Mendelssohn)
* Jerzy Giedymin
* Jerzy Łoś
* Jerzy Perzanowski
* Jerzy Prokopiuk
* Jesse Mann
* Jesse Prinz
* Jesús Mosterín
* Jesús Padilla Gálvez
* Jewish Bolshevism
* Jewish Communist Labour Party (Poalei Zion)
* Jewish Communist Party (Poalei Zion)
* Jewish Communist Union (Poalei Zion)
* Jewish ethics
* Jewish existentialism
* Jewish Kalam
* Jewish medical ethics
* Jewish philosophy
* Jhana
* Jhāna
* Jia Yi
* Jiao Yu
* Jiddu Krishnamurti
* Jien
* Jim Bell
* Jim Herrick
* Jin Yuelin
* Jindřich Zelený
* Jing Fang
* Jinul
* Jiva Goswami
* Jiyuan Yu
* Jizang
* Jo-ha-kyū
* Joachim Jungius
* Joachim of Fiore
* Joachim of Floris
* Joan Montseny
* Joan Peiró
* Joaquim Carreras I Artau
* Joaquín Ascaso Budria
* Joaquín Maurín
* Joaquín Trincado Mateo
* Jocelin of Soissons
* Jody Azzouni
* Joe Friggieri
* Joel Feinberg
* Joel J. Kupperman
* Joest Lips
* Johan Jakob Borelius
* Johan Robeck
* Johan van Benthem (logician)
* Johan Vilhelm Snellman
* Johann Adam Bergk
* Johann Augustus Eberhard
* Johann Christian Friedrich Holderlin
* Johann Christian Friedrich Hölderlin
* Johann Christian Lossius
* Johann Christoph Friedrich Schiller
* Johann Christoph Friedrich von Schiller
* Johann Christoph Wagenseil
* Johann Eduard Erdmann
* Johann Friedrich Flatt
* Johann Friedrich Herbart
* Johann Georg Hamann
* Johann Georg Heinrich Feder
* Johann Georg Sulzer
* Johann Gottfried Herder
* Johann Gottfried von Herder
* Johann Gottlieb Buhle
* Johann Gottlieb Fichte
* Johann Hast
* Johann Heinrich Abicht
* Johann Heinrich Bisterfeld
* Johann Heinrich Lambert
* Johann Heinrich Loewe
* Johann Heinrich Pabst
* Johann Heinrich Samuel Formey
* Johann Jakob Engel
* Johann Joachim Lange
* Johann Joachim Spalding
* Johann Karl Friedrich Rosenkranz
* Johann Nepomuk Ehrlich
* Johann Nepomuk Oischinger
* Johann Philipp Siebenkees
* Johann Sturm
* Johann Ulrich von Cramer
* Johann Wolfgang von Goethe
* Johannes Agnoli
* Johannes Bredenburg
* Johannes Clauberg
* Johannes de Muris
* Johannes de Raey
* Johannes Jacobus Poortman
* Johannes Kepler
* Johannes Nikolaus Tetens
* Johannes Philoponus
* Johannes Phocylides Holwarda
* Johannes Rehmke
* Johannes Scotus Eriugena
* Johannes Tauler
* John A. Leslie
* John Abercrombie (physician)
* John Alexander Gunn
* John Alexander Smith
* John Amos Comenius
* John Anderson (philosopher)
* John Argyropoulos
* John Armstrong (British writer/philosopher)
* John Arthur Passmore
* John Austin (legal philosopher)
* John B. Watson
* John Balguy
* John Beatty (philosopher)
* John Beverley Robinson (anarchist)
* John Blund
* John Broadus Watson
* John Broome (philosopher)
* John Bulwer
* John Burnheim
* John Callender (psychiatrist)
* John Calvin
* John Campbell (philosopher)
* John Caputo
* John Carew Eccles
* John Case (Aristotelian writer)
* John Clarke (Dean of Salisbury)
* John Cook Wilson
* John Corcoran (logician)
* John Corvino
* John Cowper Powys
* John Creaghe
* John Damascene
* John Daniel Wild
* John de Sècheville
* John Dee
* John Deely
* John Dewey
* John Dewey Society
* John Dumbleton
* John Duns Scotus
* John Dupré
* John E. Hare
* John E. Thomas
* John Earman
* John Elof Boodin
* John Etchemendy
* John F. X. Knasas
* John Finnis
* John Fiske (philosopher)
* John Fitzgerald (poet)
* John Foster (philosopher)
* John Gay
* John Greco (philosopher)
* John Grote
* John Halgren of Abbeville
* John Haugeland
* John Hawthorne
* John Hennon
* John Henry Bernard
* John Henry Mackay
* John Henry Morgan
* John Henry Muirhead
* John Henry Newman
* John Herman Randall Jr.
* John Heydon (astrologer)
* John Hick
* John Hoppus
* John Hospers
* John Italus
* John Jamieson Carswell Smart
* John Joseph Haldane
* John Kekes
* John L. Pollock
* John Lachs
* John Laird (philosopher)
* John Lemmon
* John Lennox
* John Levy (philosopher)
* John Lewis (philosopher)
* John Locke
* John Locke Lectures
* John Lucas
* John Lucas (philosopher)
* John M. Dillon
* John Macmurray
* John Macquarrie
* John Maeda
* John Major (philosopher)
* John Major
* John Martin Fischer
* John Maynard Keynes
* John Mbiti
* John McDowell
* John McMurtry
* John McTaggart Ellis McTaggart
* John Millar (philosopher)
* John Milton
* John Moore (anarchist)
* John N. Deck
* John N. Gray
* John Neihardt
* John Niemeyer Findlay
* John Norris (philosopher)
* John of Damascus
* John of Fidanza
* John of Głogów
* John of Jandun
* John of La Rochelle
* John of Mirecourt
* John of Paris
* John of Saint Thomas
* John of Salisbury
* John of St Thomas
* John of St. Thomas
* John Oswald (activist)
* John P. Anton
* John P. Burgess
* John Pagus
* John Passmore
* John Pecham
* John Peckham
* John Perry (philosopher)
* John Philoponus
* John Poinsot
* John Ponce
* John R. Searle
* John R. Steel
* John Rajchman
* John Ralston Saul
* John Raven
* John Rawls
* John Ray
* John Robert Jones
* John Ruskin
* John Russon
* John Sallis
* John Searle
* John Seiler Brubacher
* John Selden
* John Sergeant (priest)
* John Skorupski
* John Smith (Platonist)
* John Stuart Mackenzie
* John Stuart Mill
* John Stuart Mill Institute
* John Tauler
* John the Grammarian
* John Theophilus Desaguliers
* John Toland
* John Turner (anarchist)
* John Veitch (poet)
* John Venn
* John von Neumann
* John Weckert
* John William Miller
* John Wisdom
* John Witherspoon
* John Worrall (philosopher)
* John Wyclif
* John Wycliffe
* John Zerzan
* John Zube
* Joie de vivre
* Joint method of agreement and difference
* Jon Barwise
* Jon Elster
* Jon Hellesnes
* Jon Mandle
* Jonael Schickler
* Jonathan Barnes
* Jonathan Bennett (philosopher)
* Jonathan Dancy
* Jonathan Edwards (theologian)
* Jonathan Edwards (theology)
* Jonathan Glover
* Jonathan Kvanvig
* Jonathan Lear
* Jonathan Lowe
* Jonathan Rée
* Jonathan Schaffer
* Jonathan Wolff (philosopher)
* Jordi Pigem
* Jorge J. E. Gracia
* José Gaos
* José Gil (philosopher)
* José Guilherme Merquior
* José Ingenieros
* Jose Ortega y Gasset
* José Ortega y Gasset
* José Peirats
* José Vasconcelos
* Josef Hoëné-Wronski
* Josef Peukert
* Josef Pieper
* Josef Simon
* Josefina Ayerza
* Josep Lluís i Facerias
* Joseph-Marie de Maistre
* Joseph Addison
* Joseph Agassi
* Joseph Albo
* Joseph Alois Schumpeter
* Joseph B. Soloveitchik
* Joseph ben Judah of Ceuta
* Joseph Beuys
* Joseph Butler
* Joseph Cropsey
* Joseph D. Sneed
* Joseph de Maistre
* Joseph de Torre
* Joseph Déjacque
* Joseph Dietzgen
* Joseph Franz Molitor
* Joseph Frédéric Bérard
* Joseph Glanvill
* Joseph H. H. Weiler
* Joseph Heath
* Joseph Henry Woodger
* Joseph Hilbe
* Joseph J. Spengler
* Joseph Kosuth
* Joseph Leon Blau
* Joseph Maréchal
* Joseph Margolis
* Joseph Marie de Maistre
* Joseph Marie, baron de Gérando
* Joseph Morton Ransdell
* Joseph Owens (Redemptorist)
* Joseph Priestley
* Joseph Priestley and Dissent
* Joseph Raz
* Joseph Rovan
* Joseph Runzo
* Joseph Solomon Delmedigo
* Josephus Flavius Cook
* Joshua Cohen (philosopher)
* Joshua Knobe
* Josiah Royce
* Josiah Warren
* Josip Križan
* Journal for General Philosophy of Science
* Journal of Aesthetics and Art Criticism
* Journal of Applied Non-Classical Logics
* Journal of Applied Philosophy
* Journal of Ayn Rand Studies
* Journal of Business Ethics
* Journal of Consciousness Studies
* Journal of Ethics & Social Philosophy
* Journal of Logic, Language and Information
* Journal of Medical Ethics
* Journal of Moral Philosophy
* Journal of Philosophy
* Journal of Research Practice
* Journal of Scottish Philosophy
* Journal of the History of Ideas
* Journal of the History of Philosophy
* Journalism ethics and standards
* Journals of Ayn Rand
* Journals of philosophy
* Józef Emanuel Jankowski
* Józef Gołuchowski
* Józef Kalasanty Szaniawski
* Józef Kremer
* Jozef Maria Bochenski
* Józef Maria Bocheński
* Józef Maria Hoene-Wroński
* Józef Tischner
* Józef Życiński
* Ju
* Juan-David Nasio
* Juan Carrasco (apologist)
* Juan Chi
* Juan David García Bacca
* Juan de Dios Filiberto
* Juan de Mariana
* Juan Donoso Cortés
* Juan García Oliver
* Juan Ginés de Sepúlveda
* Juan Luis Vives
* Juan Luís Vives
* Juan Manuel Burgos
* Juan Manuel Guillén
* Juan Nuño
* Juche
* Judah ben Eliezer ha-Levi Minz
* Judah ben Moses of Rome
* Judah ben Moses Romano
* Judah Ben Samuel of Regensburg
* Judah Ha-Levi
* Judah Halevi
* Judah Leon Abravanel
* Judah Messer Leon
* Judah Messer Leon (15th century)
* Judah Romano
* Judaism
* Judea Pearl
* Judeo-Islamic philosophies (800–1400)
* Judge for Yourselves!
* Judgement
* Judgment
* Judgmental language
* Judith Butler
* Judith Jarvis Thomson
* Judith Miller (philosopher)
* Juha Varto
* Jules Barthélemy-Saint-Hilaire
* Jules Bonnot
* Jules de Gaultier
* Jules Henri Poincaré
* Jules Henri Saiset
* Jules Lequier
* Jules Vuillemin
* Julia Annas
* Julia Kristeva
* Julian Baggini
* Julian Gumperz
* Julian Jaynes
* Julián Marías
* Julian Nida-Rümelin
* Julian Ochorowicz
* Julian Savulescu
* Julian the Apostate
* Julie Rivkin
* Julie, or the New Heloise
* Julien Benda
* Julien Offray de La Mettrie
* Julien Offroy de La Mettrie
* Julius Bahnsen
* Julius Binder
* Julius Caesar Scaliger
* Julius Duboc
* Julius Ebbinghaus
* Julius Evola
* Julius Frank
* Julius Frauenstädt
* Julius Guttmann
* Julius Schaller
* Julius Wilhelm Richard Dedekind
* Jun-Hyeok Kwak
* Jung
* Junge Wilde
* Junius Rusticus
* Junzi
* Juozas Girnius
* Jura Books
* Jura federation
* Jürgen Habermas
* Jürgen Mittelstraß
* Jurisdictional arbitrage
* Jurisprudence
* Jury nullification
* Jus ad bellem
* Jus ad bellum
* Jus in bello
* Jus post bellum
* Jus sanguinis
* Jus soli
* Just-world phenomenon
* Just a Couple of Days
* Just in case
* Just price
* Just war
* Just War
* Just war theory
* Justice
* Justice as fairness
* Justice as Fairness
* Justice as Fairness: A Restatement
* Justification
* Justification by faith
* Justification for the state
* Justified true belief
* Justin Leiber
* Justin Martyr
* Justin Oakley
* Justin Popović
* Justinian I
* Justitium
* Justus Lipsius

## K

* K'ang Yu-wei
* K'ung Ch'iu
* K'ung Tzu
* K. J. Popma
* K. N. Jayatilleke
* Kabbalah
* Kabouter
* Kafé 44
* Kai Nielsen (philosopher)
* Kaibara Ekken
* Kala
* Kāla
* Kalam
* Kalam cosmological argument
* Kalos kagathos
* Kalpa (aeon)
* Kammaṭṭhāna
* Kanada
* Kancha Ilaiah
* Kang Youwei
* Kantian ethics
* Kantianism
* Kao Tzu
* Karaism
* Karel Kosík
* Karel Lambert
* Karel Verleye
* Karen Hanson
* Karen J. Warren
* Karen Swassjan
* Karl-Otto Apel
* Karl Albert
* Karl Ameriks
* Karl Barth
* Karl Christian Friedrich Krause
* Karl Christian Planck
* Karl Daub
* Karl Emil Maximilian Weber
* Karl Fortlage
* Karl Heinrich Heydenreich
* Karl Heinrich Marx
* Karl Jaspers
* Karl Joel (philosopher)
* Karl Johann Kautsky
* Karl Joseph Hieronymus Windischmann
* Karl Kautsky
* Karl Korsch
* Karl Kraus
* Karl Leonhard Reinhold
* Karl Loewenstein
* Karl Löwith
* Karl Ludwig Michelet
* Karl Mannheim
* Karl Marx
* Karl Menger
* Karl Olivecrona
* Karl Popper
* Karl Rahner
* Karl Raimund Popper
* Karl Renner
* Karl Robert Eduard von Hartmann
* Karl Theodor Bayrhoffer
* Karl Theodor Jaspers
* Karl von Prantl
* Karl Vorländer
* Karl Wilhelm Ferdinand Solger
* Karl Wilhelm Friedrich Schlegel
* Karl Wilhelm Ramler
* Karl, Freiherr von Prel
* Karma
* Karma in Buddhism
* Karma in Jainism
* Karmic
* Karol Libelt
* Karuṇā
* Kaśmir Śaivism
* Kaspar Schmidt
* Katalepsis
* Katarzyna Jaszczolt
* Kate Sharpley Library
* Kate Soper
* Katharsis
* Kathekon
* Kathleen Higgins
* Kautilya
* Kavka's toxin puzzle
* Kazimierz Ajdukiewicz
* Kazimierz Łyszczyński
* Kazimierz Twardowski
* Keiji Nishitani
* Keith Campbell (philosopher)
* Keith DeRose
* Keith Donnellan
* Keith Lehrer
* Keith Ward
* Keith Yandell
* Ken Wilber
* Kenan Malik
* Kendall Walton
* Kenelm Digby
* Kennedy Institute of Ethics
* Kennedy Institute of Ethics Journal
* Kenneth Allen Taylor
* Kenneth Arrow
* Kenneth Clatterbaugh
* Kenneth Rexroth
* Kennisbank Filosofie Nederland
* Kenoma
* Kensho
* Kent Bach
* Kermit Scott
* Kersey Graves
* Kevala Jnana
* Kevin Carson
* Kevin Mulligan
* Khaldūn
* Khen Lampert
* Khôra
* Kieron O'Hara
* Killing Time (Paul Feyerabend book)
* Kim Jwa-jin
* Kim Sterelny
* Kin selection
* Kind
* Kindness
* Kinesis
* Kinetic art
* Kinetic theory
* Kingdom of Ends
* Kit Fine
* Kitāb al-Hayawān (Aristotle)
* Kitabatake Chikafusa
* Kitaro Nishida
* Kitsch
* Kiyoshi Miki
* KK thesis
* Klaus Klostermaier
* Klement Jug
* Knight of faith
* Knightly Virtues
* Know thyself
* Knower paradox
* Knowledge
* Knowledge acquisition
* Knowledge and Its Limits
* Knowledge by acquaintance
* Knowledge by description
* Knowledge of Angels
* Knowledge relativity
* Knud Ejler Løgstrup
* Kohlberg's stages of moral development
* Kojin Karatani
* Kokoro
* Kol HaTor
* Konstantin Aksakov
* Konstantin Chkheidze
* Konstantin Kavelin
* Konstantin Leontiev
* Konstantin Pobedonostsev
* Konstantinos Michail
* Konstanty Michalski
* Korean philosophy
* Kosha
* Kostas Axelos
* Kosuke Koyama
* Krastyo Krastev
* Angelika Krebs
* Kripke semantics
* Krishna Chandra Bhattacharya
* Kronstadt rebellion
* Krystyn Lach Szyrma
* Krzysztof Pomian
* Ksenija Atanasijević
* Kūkai
* Kuki Shūzō
* Kumārajīva
* Kumārila Bhaṭṭa
* Kumazawa Banzan
* Kung
* Kung-sun Lung Tzu
* Kung Fu-tzu
* Kuno Fischer
* Kuno Lorenz
* Kunstreligion
* Kuo Hsiang
* Kuroda Kan'ichi
* Kuroda normal form
* Kurt Almqvist
* Kurt Baier
* Kurt Gödel
* Kurt Gödel Society
* Kurt Grelling
* Kurt Lewin
* Kurt Riezler
* Kurt Rudolf Fischer
* Kurt Singer
* Kurt Sternberg
* Kuzari
* Kwame Anthony Appiah
* Kwame Gyekye
* Kwame Nkrumah
* Kwasi Wiredu
* Kwŏn Kŭn
* Kyklos
* Kyle Stanford
* Kyoto school

## L

* L'Abécédaire de Gilles Deleuze
* L'Arco e la Clava
* L'En-Dehors
* L'existentialisme est un humanisme
* L'expérience intérieure
* L. Susan Brown
* L. T. F. Gamut
* L. W. Sumner
* La Part maudite
* La Peau de chagrin
* La Riposte
* Labadie Collection
* Labor aristocracy
* Labor theory of property
* Labour power
* Lacan at the Scene
* Laches (dialogue)
* Lacydes of Cyrene
* Ladislav Klíma
* Lady Masham
* Laelius de Amicitia
* Lai Zhide
* Laïcité
* Lakatos Award
* Lambda calculus
* Lambert of Auxerre
* Lambertus de Monte
* Land ethic
* Landless Peoples Movement
* Landless Workers' Movement
* Language
* Language-game
* Language and thought
* Language equation
* Language game
* Language identification in the limit
* Language of thought
* Language of thought hypothesis
* Language, Truth, and Logic
* Languages of Art
* Lanza del Vasto
* Laozi
* Laplace's demon
* Larry Laudan
* Larry Sanger
* Lars-Henrik Schmidt
* Lars Gule
* Last man
* Lastheneia of Mantinea
* Late modernism
* Lateral thinking
* Latin Conservatism
* Latitudinarianism
* Latitudinarianism (philosophy)
* Lattice theory
* Laughter
* Laughter (Bergson)
* Laura Kipnis
* Laurence BonJour
* Laurence Jonathan Cohen
* Laurence Lampert
* Laurens Perseus Hickok
* Laurent Tailhade
* Law
* Law (principle)
* Law as integrity
* Law in action
* Law of accumulation
* Law of attraction (New Thought)
* Law of contraries
* Law of double negation
* Law of excluded middle
* Law of identity
* Law of large numbers
* Law of nature
* Law of non-contradiction
* Law of succession
* Law of the Infinite Cornucopia
* Law of thought
* Law of trichotomy
* Law of Unintended Consequences
* Law of value
* Law, Legislation and Liberty
* Lawrence C. Becker
* Lawrence Ferlinghetti
* Lawrence Kohlberg
* Lawrence Sklar
* Lawrence Stepelevich
* Lawrence Storione
* Laws (dialogue)
* Laws of Form
* Laws of nature
* Laws of thought
* Lazarus Geiger
* Laziness
* Lazy argument
* Lazy Reason
* Le Ton beau de Marot
* Leadership
* League of peace
* Leap of faith
* Learned Hand
* Learning
* Least squares method
* Lebensphilosophie
* Lebenswelt
* Lectures on Aesthetics
* Lectures on the Philosophy of Religion
* Lectures on the History of Philosophy
* Lectures on the Philosophy of History
* Lee Carroll
* Leemon McHenry
* Left communism
* Left quotient
* Left recursion
* Left SR uprising
* Legal code (municipal)
* Legal concept
* Legal death
* Legal Education and the Reproduction of Hierarchy
* Legal ethics
* Legal formalism
* Legal interpretation
* Legal liability
* Legal malpractice
* Legal moralism
* Legal naturalism
* Legal origins theory
* Legal philosophy
* Legal positivism
* Legal principle
* Legal realism
* Legal right
* Legal rights
* Legal science
* Legalism
* Legalism (Chinese philosophy)
* Legalism (Western philosophy)
* Legisign
* Legitimacy (political)
* Legitimists (disambiguation)
* Leibniz's gap
* Leibniz's law
* Leibniz–Clarke correspondence
* Lelio Basso
* Lemma (logic)
* Lemma (mathematics)
* Leninism
* Lennart Åqvist
* Leo Apostel
* Léo Ferré
* Leo Harrington
* Leo Kofler
* Leo Kuper
* Leo Mikhailovich Lopatin
* Leo Strauss
* Leo the Mathematician
* Leo Tolstoy
* Leo Tolstoy bibliography
* Leon Battista Alberti
* Léon Brunschvicg
* Leon Chwistek
* Leon Czolgosz
* Léon Dumont
* Leon Henkin
* Léon Ollé-Laprune
* Leon Petrazycki
* Leon Petrażycki
* Leon Trotsky
* Leonard B. Meyer
* Leonard Harris (philosopher)
* Leonard Linsky
* Leonard Nelson
* Leonard Peikoff
* Leonard Read
* Leonard Trelawny Hobhouse
* Leonardo da Vinci
* Leonardo Garzoni
* Leonardo Moledo
* Leonardo Polo
* Léonce Crenier
* Leonid Grinin
* Leonid Pitamic
* Leonid Stolovich
* Leonidas Donskis
* Leonteus of Lampsacus
* Leontion
* Leopold Flam
* Leopold Kronecker
* Leopold Löwenheim
* Leopoldo Zea Aguilar
* Les Automatistes
* Les jeux sont faits
* Les Nabis
* Les Temps modernes
* Lesbian feminism
* Leslie Armour
* Leslie Green (philosopher)
* Leslie Stephen
* Letter to a Christian Nation
* Letters of Ayn Rand
* Letters of Insurgents
* Letters to a Philosophical Unbeliever
* Letters to Malcolm: Chiefly on Prayer
* Lettre sur les aveugles à l'usage de ceux qui voient
* Lettrism
* Leucippus
* Lev Chernyi
* Lev Semenovich Vygotskii
* Lev Semënovich Vygotskii
* Lev Semenovich Vygotsky
* Lev Shestov
* Lev Vygotskii
* Lev Vygotsky
* Level
* Levels of adequacy
* Levels of Knowing and Existence
* Levi ben Gershom
* Levi Hedge
* Leviathan (book)
* Leviathan and the Air-Pump
* Lew Rockwell
* Lewis's trilemma
* Lewis Call
* Lewis Carroll
* Lewis Gordon
* Lewis Mumford
* Lewis White Beck
* LewRockwell.com
* Lex talionis
* Lex, Rex
* Lexical ambiguity
* Lexical definition
* Lexicology
* Lexicon
* Lexington Avenue bombing
* Lexis (Aristotle)
* LF (logical framework)
* LGBT topics and Confucianism
* Li
* Li (Confucian)
* Li (Neo-Confucianism)
* Li Ao
* Li Ao (philosopher)
* Li Chi
* Li Kui (legalist)
* Li Shenzhi
* Li Shicen
* Li Si
* Li Zhi (philosopher)
* Liang Ch'i-ch'ao
* Liang Qichao
* Liang Shuming
* Liar paradox
* Liber de Causis
* Liberal arts
* Liberal conservatism
* Liberal eugenics
* Liberal movements within Islam
* Liberal nationalism
* Liberal paradox
* Liberalism
* Liberalism in Canada
* Liberalism worldwide
* Liberation theology
* Libero International
* Libertarian League
* Libertarian Marxism
* Libertarian municipalism
* Libertarian perspectives on revolution
* Libertarian socialism
* Libertarian theories of law
* Libertarian transhumanism
* Libertarian Workers' Group
* Libertarianism
* Libertarianism (metaphysics)
* Libertarianism (philosophy)
* Libertarianism (politics)
* Libertarias
* Liberté, égalité, fraternité
* Libertinism
* Liberty
* Liberty right
* Liberum arbitrium
* Library of Friedrich Nietzsche
* Library of Living Philosophers
* Lie
* Lie Yukou
* Liezi
* Life
* Life-world
* Life and death
* Life and Labor Commune
* Life course theory
* Life imitating art
* Life is a Dream
* Life Is Real Only Then, When 'I Am'
* Life of Apollonius of Tyana
* Life of Jesus (Hegel)
* Life of Pi
* Life stance
* Lifeboat ethics
* Lifestyle (sociology)
* Lifestyle anarchism
* Lifeworld
* Light of nature
* Lightness (philosophy)
* Likkutei Sichos
* Lila: An Inquiry into Morals
* Lilian Wolfe
* Lilli Alanen
* Limbo
* Limit-experience
* Limited Inc
* Lin-chi
* Lin Yutang
* Linacre Quarterly
* Linda Martín Alcoff
* Linda Trinkaus Zagzebski
* Lindley Darden
* Line of Beauty
* Line of flight
* Lineage (Buddhism)
* Linear grammar
* Linear logic
* Linear order
* Linguistic analysis
* Linguistic competence
* Linguistic determinism
* Linguistic discrimination
* Linguistic performance
* Linguistic philosophy
* Linguistic relativity
* Linguistic semantics
* Linguistic turn
* Linguistics and Philosophy
* Linji Yixuan
* List of aestheticians
* List of African American philosophers
* List of American philosophers
* List of anarchist books
* List of anarchist communities
* List of anarchist movements by region
* List of anarchist musicians
* List of anarchist organizations
* List of anarchist periodicals
* List of anarchist poets
* List of anarcho-punk bands
* List of ancient Greek philosophers
* List of ancient Platonists
* List of Argentine philosophers
* List of Armenian scientists and philosophers
* List of books about philosophy
* List of British philosophers
* List of Canadian philosophers
* List of Catholic philosophers and theologians
* List of Chinese philosophers
* List of cognitive biases
* List of communist ideologies
* List of communist parties
* List of Confucianists
* List of contributors to Marxist theory
* List of critical theorists
* List of culturally linked qualities of music
* List of current communist states
* List of Cynic philosophers
* List of environmental philosophers
* List of Epicurean philosophers
* List of epistemologists
* List of ethicists
* List of ethics topics
* List of existentialists
* List of fallacies
* List of female mystics
* List of female philosophers
* List of fictional anarchists
* List of French artistic movements
* List of French philosophers
* List of German-language philosophers
* List of humanism topics
* List of humanists
* List of Iranian philosophers
* List of Italian philosophers
* List of Jewish American philosophers
* List of Jewish anarchists
* List of Jewish scientists and philosophers
* List of Korean philosophers
* List of Latin phrases (A–E)
* List of logicians
* List of metaphysicians
* List of Muslim philosophers
* List of Nazi ideologues
* List of new religious movements
* List of nontheists (philosophy)
* List of Pakistani scientists and philosophers
* List of paradoxes
* List of philosophers
* List of philosophers (A–C)
* List of philosophers (D–H)
* List of philosophers (I–Q)
* List of philosophers (R–Z)
* List of philosophers born in the centuries BC
* List of philosophers born in the eighteenth century
* List of philosophers born in the eleventh through fourteenth centuries
* List of philosophers born in the fifteenth and sixteenth centuries
* List of philosophers born in the first through tenth centuries
* List of philosophers born in the nineteenth century
* List of philosophers born in the seventeenth century
* List of philosophers born in the twentieth century
* List of philosophers of language
* List of philosophers of mind
* List of philosophers of science
* List of philosophical topics
* List of philosophies
* List of philosophy anniversaries
* List of philosophy journals
* List of political philosophers
* List of postmodern critics
* List of rasa'il in the Encyclopedia of the Brethren of Purity
* List of Renaissance commentators on Aristotle
* List of Renaissance humanists
* List of Romanian philosophers
* List of rules of inference
* List of Russian anarchists
* List of Russian philosophers
* List of scholastic philosophers
* List of schools of philosophy
* List of Slovenian philosophers
* List of social and political philosophers
* List of speakers in Plato's dialogues
* List of Stoic philosophers
* List of teachers of Advaita Vedanta
* List of thinkers influenced by deconstruction
* List of thought processes
* List of topics in philosophical aesthetics
* List of topics in sexual ethics
* List of Turkish philosophers
* List of Turkish philosophers and scientists
* List of utilitarians
* List of works about Friedrich Nietzsche
* List of works by Joseph Priestley
* List of works by Lucian
* List of works in critical theory
* List of writers influenced by Aristotle
* List of years in philosophy
* Listen, Anarchist!
* Lists of anarchism topics
* Lists of philosophers
* Lists of philosophy topics
* Literal meaning
* Literary criticism
* Literary merit
* Literary theory
* Littoral art
* Liu Boming (philosopher)
* Liu Bowen
* Liu Shaoqi
* Liu Shifu
* Liu Xie
* Lived body
* Lives and Opinions of Eminent Philosophers
* Living Ethics
* Living Garment of God
* Living High and Letting Die
* Living Marxism
* Living My Life
* Ljubomir Cuculovski
* Loaded question
* Löb's theorem
* Local skepticism
* Localism (politics)
* Locke's Socks
* Locutionary act
* Locutions
* Logic
* Logic alphabet
* Logic as a Positive Science
* Logic diagram
* Logic in China
* Logic in computer science
* Logic in Islamic philosophy
* Logic Made Easy
* Logic of information
* Logic redundancy
* Logic Spectacles
* Logica nova
* Logica Universalis
* Logical argument
* Logical atomism
* Logical biconditional
* Logical certainty
* Logical connective
* Logical consequence
* Logical constant
* Logical constants
* Logical disjunction
* Logical empiricism
* Logical equality
* Logical equivalence
* Logical extreme
* Logical form
* Logical graph
* Logical harmony
* Logical holism
* Logical implication
* Logical independence
* Logical matrix
* Logical necessity
* Logical NOR
* Logical paradox
* Logical positivism
* Logical Positivism
* Logical possibility
* Logical predicate
* Logical quality
* Logical reasoning
* Logical symbols
* Logical syntax
* Logical system
* Logical theory
* Logical truth
* Logicism
* Logicomix
* Logics
* Logocentric
* Logocentrism
* Logoi
* Logorrhoea (linguistics)
* Logos
* Logos: A Journal of Modern Society and Culture
* Logosophy
* Lon L. Fuller
* London Action Resource Centre
* London Autonomists
* London Positivist Society
* Lonergan Institute
* Longchenpa
* Longinus
* Longinus (literature)
* Looking Backward
* Lookism
* Lopamudra
* Lord Kames
* Lord Monboddo
* Lord Shaftesbury
* Lord Shang
* Loren Eiseley
* Loren Lomasky
* Lorenz Oken
* Lorenzo Magalotti
* Lorenzo Magnani
* Lorenzo Peña
* Lorenzo Valla
* Los Solidarios
* Loss aversion
* Lottery of birth
* Lottery paradox
* Lou Marinoff
* Louis-Françisque Lélut
* Louis Althusser
* Louis Billot
* Louis Claude de Saint-Martin
* Louis Couturat
* Louis Dupré
* Louis Eugène Marie Bautain
* Louis Gabriel Ambroise de Bonald
* Louis H. Mackey
* Louis Lavelle
* Louis Narens
* Louis Pojman
* Louis Rougier
* Louise Berger
* Louise Bryant
* Louise Michel
* Love
* Lovefeast
* Lowenfield v. Phelps
* Löwenheim–Skolem theorem
* Loyalty
* Lu-shih ch'un-ch'iu
* Lü-shih ch'un-ch'iu
* Lu Ban
* Lu Hsiang-shan
* Lu Jiuyuan
* Lü Liuliang
* Lu Xiangshan
* Luc Bovens
* Luc de Clapiers, marquis de Vauvenargues
* Luc Ferry
* Luce Irigaray
* Lucía Sánchez Saornil
* Lucian
* Lucian Blaga
* Lucian Floridi
* Lucian of Samosata
* Luciano Floridi
* Lucien Goldmann
* Lucien Lévy-Bruhl
* Lucifer the Lightbearer
* Lucilio Vanini
* Lucio Colletti
* Lucio Urtubia
* Lucius Annaeus Cornutus
* Lucius Annaeus Seneca
* Luck
* Lucretius
* Lucy Parsons
* Luddite
* Ludic
* Ludic fallacy
* Ludovico Geymonat
* Ludwig Feuerbach
* Ludwig Babenstuber
* Ludwig Boltzmann
* Ludwig Büchner
* Ludwig Klages
* Ludwig Landgrebe
* Ludwig Marcuse
* Ludwig Tieck
* Ludwig von Mises
* Ludwig Wittgenstein
* Ludwik Fleck
* Luigi Fabbri
* Luigi Ferri
* Luigi Galleani
* Luigi Guido Grandi
* Luigi Lucheni
* Luigi Pareyson
* Luis de Molina
* Luís Filipe Teixeira
* Luisa Capetillo
* Luitzen Egbertus Jan Brouwer
* Luminism (American art style)
* Lun Yu
* Lunheng
* Lunyu
* Luo Rufang
* Lương Kim Định
* Lüshi Chunqiu
* Lust
* Lutheran scholasticism
* Lutz Wingert
* Luxemburgism
* Lwów–Warsaw school
* Lyceum
* Lyceum (classical)
* Lyco of Iasos
* Lyco of Troas
* Lycophron (sophist)
* Lying
* Lynn Pasquerella
* Lynne Rudder Baker
* Lyrical abstraction
* Lysander Spooner
* Lysis (dialogue)
* Lysis of Taras
* Lyubomir Ivanov (explorer)
* Lyubov Axelrod

## M

* M. Nasroen
* Ma Rong
* Mach's principle
* Machiavellianism
* Macrocosm
* Macrocosm and microcosm
* Mad pain and Martian pain
* Madame de Stael
* Madame de Staël
* Madeleine Doran
* Madhava
* Madhusūdana Sarasvatī
* Madhvacharya
* Madhwas
* Madhyamaka
* Madhyamika
* Mādhyamika
* Madhyamika Buddhism
* Mādhyamika Buddhism
* Magdalena Środa
* Magical thinking
* Magna Moralia
* Magnanimity
* Magnificence (History of ideas)
* Mahabharata
* Mahābhūta
* Mahamudra
* Mahasi Sayadaw
* Mahatma Gandhi
* Mahavira
* Mahayana
* Mahayana Buddhism
* Mahmoud Khatami
* Maieutics
* Maimonides
* Maine de Biran
* Maitreya-nātha
* Maitreyi
* Major term
* Makapansgat pebble
* Makhnovshchina
* Maksim Rayevsky
* Malakia
* Malcolm Knox
* Malinda Cramer
* Malthusian catastrophe
* Malthusian equilibrium
* Man's Fate
* Man's inhumanity to man
* Man a Machine
* Man and Society
* Man and Technics
* Manas-vijnana
* Manchester Literary and Philosophical Society
* Mandala
* Maṇḍana Miśra
* Mandate of Heaven
* Mandated choice
* Mandeville's paradox
* Manfred Frank
* Mani
* Mani Kaul
* Manichaeism
* Manicheanism
* Manifesto of the Sixteen
* Manifold
* Manlio Sgalambro
* Mannerism
* Mantra
* Manuchehr Jamali
* Manuel Buenacasa Tomeo
* Manuel Chrysoloras
* Manuel de Landa
* Manuel Lassala
* Manuel Sacristán
* Many-minds interpretation
* Many-valued logic
* Many-valued logics
* Many-worlds interpretation of quantum mechanics
* Manzoor Ahmad
* Mao Zedong
* Maoism
* Map–territory relation
* Mappō
* Marburg School
* Marc-Alain Ouaknin
* Marc de Vries
* Marc Jean-Bernard
* Marc Sautet
* Marcantonio Genua
* Marcel Conche
* Marcel Gauchet
* Marcello Pera
* Marcelo Dascal
* Marcelo Sánchez Sorondo
* Marco Camenisch
* Marcus Aurelius
* Marcus Favonius
* Marcus George Singer
* Marcus Minucius Felix
* Marcus Musurus
* Marek Siemek
* Margaret Canovan
* Margaret Cavendish, Duchess of Newcastle-upon-Tyne
* Margaret Elizabeth Egan
* Margaret Gilbert
* Margaret Somerville
* Margareta i Kumla
* Marginal utility
* Marginalization
* Maria Gaetana Agnesi
* Maria Montessori
* Maria Nikiforova
* Maria Occhipinti
* Maria Ossowska
* María Zambrano
* Maria: or, The Wrongs of Woman
* Marian Hillar
* Marian Jaworski
* Marian Massonius
* Marian Zdziechowski
* Marianna Marquesa Florenzi
* Mariano Artigas
* Marie-Louise Berneri
* Marie Equi
* Marilena Chaui
* Marilyn Frye
* Marilyn McCord Adams
* Marin Mersenne
* Marinus of Neapolis
* Mario Bettinus
* Mario Bunge
* Mario De Caro
* Mario Kopić
* Mario Perniola
* Marius the Epicurean
* Marius Victorinus
* Marjorie Grene
* Mark Addis
* Mark Alan Walker
* Mark C. Taylor
* Mark Cherry
* Mark de Bretton Platts
* Mark Johnson (philosopher)
* Mark Kingwell
* Mark Kuczewski
* Mark Lance
* Mark Olssen
* Mark Philp
* Mark Sacks
* Mark Sainsbury (philosopher)
* Mark Sainsbury (philosopher)
* Mark Steiner
* Mark Vernon
* Mark Wrathall
* Market populism
* Market socialism
* Marketing ethics
* Markov process
* Markus Herz
* Marlène Zarader
* Marpa Lotsawa
* Marquis de Condorcet
* Marriage
* Marshall Berman
* Marshall McLuhan
* Marsiglio of Padua
* Marsilio dei Mainardine
* Marsilio Ficino
* Marsilius of Inghen
* Marsilius of Padua
* Marta Petreu
* Martha C. Nussbaum
* Martha Craven Nussbaum
* Martha Klein
* Martha Nussbaum
* Martial Guéroult
* Martian scientist
* Martin A. Hainz
* Martin Buber
* Martin Davis
* Martin Deutinger
* Martin Gardner
* Martin Heidegger
* Martin Hollis (philosopher)
* Martin Knutzen
* Martin Kusch
* Martin Löb
* Martin Luther
* Martin Luther King Jr.
* Martin Stokhof
* Martin van Hees
* Martine Batchelor
* Martinus Smiglecius
* Martyn Evans (academic)
* Marvin Farber
* Marvin Minsky
* Marx's Historical Stages
* Marx's theory of alienation
* Marx's theory of history
* Marx's theory of human nature
* Marx W. Wartofsky
* Marx’s method
* Marxism
* Marxism–Leninism
* Marxist aesthetics
* Marxist feminism
* Marxist humanism
* Marxist philosophy
* Marxist philosophy of nature
* Marxist sociology
* Mary's room
* Mary Anne Atwood
* Mary Anne Warren
* Mary Astell
* Mary Daly
* Mary Hesse
* Mary Louise Pratt
* Mary Midgley
* Mary Tiles
* Mary Warnock
* Mary Warnock, Baroness Warnock
* Mary Whiton Calkins
* Mary Wollstonecraft
* Masakazu Nakai
* Masao Abe
* Masculism
* Masked-man fallacy
* Mass noun
* Massimo Cacciari
* Massimo Pigliucci
* Master-slave dialectic
* Master-slave morality
* Master argument
* Master suppression techniques
* Mateo Aimerich
* Material conditional
* Material equivalence
* Material good
* Material implication
* Material monism
* Material nonimplication
* Material substratum
* Materialism
* Materialism and Empirio-criticism
* Mateu Morral
* Mathematical analysis
* Mathematical beauty
* Mathematical constructivism
* Mathematical fallacy
* Mathematical function
* Mathematical induction
* Mathematical intuitionism
* Mathematical logic
* Mathematical Proceedings of the Cambridge Philosophical Society
* Mathematical space
* Mathematical universe hypothesis
* Mathematics and art
* Matheolus Perusinus
* Mathesis universalis
* Matrix grammar
* Matrix mechanics
* Matteo Campani-Alimenis
* Matteotti Battalion
* Matter
* Matter (philosophy)
* Matter and Memory
* Matthew Ferchi
* Matthew Foreman
* Matthew Lipman
* Matthew of Aquasparta
* Matthew Stewart (philosopher)
* Matthew Tindal
* Matti Häyry
* Maurice Blanchot
* Maurice Blondel
* Maurice Brinton
* Maurice Cranston
* Maurice De Wulf
* Maurice Halbwachs
* Maurice Merleau-Ponty
* Maurice Pradines
* Mauricio Suarez
* Max Baginski
* Max Bense
* Max Black
* Max Dessoir
* Max Hödel
* Max Horkheimer
* Max More
* Max Müller
* Max Müller (Catholic intellectual)
* Max Planck
* Max Scheler
* Max Scheler's Concept of Ressentiment
* Max Stirner
* Max Weber
* Maxence Caron
* Maxim (philosophy)
* Maximal consistent set
* Maximalism
* Maximilien Luce
* Maximinus (Praetorian Prefect)
* Maximus of Ephesus
* Maximus of Tyre
* Maximus the Confessor
* Maxine Greene
* Maxwell's demon
* May 68, Philosophy is in the Street!
* Maya (illusion)
* Maya Keyes
* Mazdak
* Mazu Daoyi
* Meaning
* Meaning (existential)
* Meaning (linguistics)
* Meaning (non-linguistic)
* Meaning (philosophy of language)
* Meaning (semiotics)
* Meaning of life
* Meaning of life (philosophy)
* Meaning postulate
* Meaningless statement
* Means to an end
* Measurement
* Measurement in quantum mechanics
* Mechanics
* Mechanics (Aristotle)
* Mechanism (philosophy)
* Media accountability
* Media ecology
* Media ethics
* Media transparency
* Mediated reference theory
* Mediation (Marxist theory and media studies)
* Medical error
* Medical ethics
* Medical gaze
* Medical torture
* Medical waste
* Medieval logic
* Medieval philosophy
* Medieval science
* Mediocrity principle
* Meditations
* Meditations on First Philosophy
* Meditations on the Peaks
* Meera Nanda
* Megalothymia and Isothymia
* Megarian school
* Megarians
* Mehdi Belhaj Kacem
* Mehmet Aydın
* Meiklejohnian absolutism
* Meinong's jungle
* Meister Eckhart
* Mel Bradford
* Melbourne School of Continental Philosophy
* Melchiorre Gioia
* Melchor Rodríguez García
* Meleager of Gadara
* Meletus
* Meliorism
* Melissus
* Melissus of Samos
* Melville Y. Stewart
* Meme
* Meme pool
* Memeplex
* Memetics
* Memoirs Illustrating the History of Jacobinism
* Memoirs of Emma Courtney
* Memorabilia (Xenophon)
* Memory
* Men's rights
* Men Among the Ruins
* Mencius
* Mencius (book)
* Mendelian genetics
* Menedemus
* Menedemus of Pyrrha
* Menedemus the Cynic
* Menexenus (dialogue)
* Meng-tzu
* Meng K'o
* Mengzi
* Menippus
* Meno
* Mens rea
* Mental body
* Mental causation
* Mental event
* Mental functions
* Mental illness
* Mental image
* Mental imagery
* Mental process
* Mental property
* Mental representation
* Mental space
* Mental state
* Mental substance
* Mental world
* Mentalese
* Mentalism (philosophy)
* Mentality
* Menyhért Palágyi
* Meontology
* Merab Mamardashvili
* Mercy
* Mere addition paradox
* Mereological essentialism
* Mereological nihilism
* Mereology
* Mereotopology
* Merit
* Merit (Buddhism)
* Meritarian
* Meritocracy
* Merton School
* Meshico
* Mesillat Yesharim
* Message from the East
* Messianic democracy
* Messianism
* Messius Phoebus Severus
* Meta
* Meta-discussion
* Meta-emotion
* Meta-epistemology
* Meta-ethics
* Meta-ontology
* Meta-philosophy
* Meta-rights
* Metadiscourse
* Metaethics
* Metaknowledge
* Metakosmia
* Metal Gear Solid 3: Snake Eater
* Metalanguage
* Metalogic
* Metamagical Themas
* Metamathematics
* Metameme
* Metametaphysics
* Metaphilosophy
* Metaphor
* Metaphor in philosophy
* Metaphor of the Sun
* Metaphysical art
* Metaphysical Foundations of Natural Science
* Metaphysical naturalism
* Metaphysical necessity
* Metaphysical nihilism
* Metaphysical objectivism
* Metaphysical poets
* Metaphysical realism
* Metaphysical Society
* Metaphysical solipsism
* Metaphysical subjectivism
* Metaphysics
* Metaphysics (Aristotle)
* Metaphysics of Morals
* Metaphysics of presence
* Metaphysics of quality
* Metaphysics of War
* Metarealism
* Metasyntax
* Metatheorem
* Metatheory
* Metaxy
* Metempsychosis
* Meteorology (Aristotle)
* Method of agreement
* Method of concomitant variations
* Method of residues
* Methodic doubt
* Methodical culturalism
* Methodios Anthrakites
* Methodism
* Methodism (philosophy)
* Methodological individualism
* Methodological naturalism
* Methodological relativism
* Methodological skepticism
* Methodological solipsism
* Methodology
* Methods of obtaining knowledge
* Metrocles
* Metrodorus of Athens
* Metrodorus of Chios
* Metrodorus of Cos
* Metrodorus of Lampsacus (the elder)
* Metrodorus of Lampsacus (the younger)
* Metrodorus of Stratonicea
* Mexican Liberal Party
* Michael A. E. Dummett
* Michael A. Smith (philosopher)
* Michael Anthony Eardley Dummett
* Michael Bratman
* Michael Davis (philosopher)
* Michael Devitt
* Michael Dummett
* Michael E. Rosen
* Michael E. Zimmerman (philosopher)
* Michael Ferejohn
* Michael Foster (philosopher)
* Michael Fourman
* Michael Frede
* Michael Friedman (philosopher)
* Michael Gelven
* Michael Gottlieb Birckner
* Michael Hardt
* Michael Hissmann
* Michael Ignatieff
* Michael Joseph Oakeshott
* Michael Levin (philosopher)
* Michael Lockwood (philosopher)
* Michael Lynch (philosopher)
* Michael Martin (philosopher)
* Michael Matteson
* Michael Neumann
* Michael Novak
* Michael O. Rabin
* Michael Oakeshott
* Michael of Ephesus
* Michael of Massa
* Michael Otsuka
* Michael Polanyi
* Michael Psellos
* Michael R. Ayers
* Michael Ruse
* Michael Sandel
* Michael Schmidt-Salomon
* Michael Scriven
* Michael Sprinker
* Michael Talbot (author)
* Michael Tye (philosopher)
* Michael Vavrus
* Michael Walzer
* Michael Williams (philosopher)
* Michał Falkener
* Michał Heller
* Michał Sędziwój
* Michał Twaróg of Bystrzyków
* Michał Wiszniewski
* Michel Bitbol
* Michel de Certeau
* Michel de Montaigne
* Michel Eyquem de Montaigne
* Michel Fattal
* Michel Foucault
* Michel Foucault bibliography
* Michel Henry
* Michel Onfray
* Michel Pêcheux
* Michel Serres
* Michel Seymour
* Michelangelo Fardella
* Michele Cianciulli
* Michele Le Doeuff
* Michèle Le Doeuff
* Michèle Le Dœuff
* Microcosm
* Middle knowledge
* Middle Platonism
* Middle term
* Middle Way
* Midrash
* Midwest Studies in Philosophy
* Might Is Right
* Might makes right
* Miguel de Unamuno
* Miguel de Unamuno y Jugo
* Miguel García (anarchist)
* Miguel García Vivancos
* Miguel Larreynaga
* Miguel Reale
* Miguel Serrano
* Mihailo Đurić
* Mihailo Marković
* Mikael Stenmark
* Mike Lesser
* Mike Sandbothe
* Mikel Dufrenne
* Mikelis Avlichos
* Mikhail Bakhtin
* Mikhail Bakunin
* Mikhail Lifshitz
* Mikhail Ovsyannikov
* Mikhail Shcherbatov
* Miki Kiyoshi
* Mikyo Dorje
* Mikyö Dorje
* Milan Damnjanović (philosopher)
* Milan Kangrga
* Milan Komar
* Milan Vidmar
* Milarepa
* Milesian school
* Milgram experiment
* Military medical ethics
* Mill's methods
* Mill's Methods
* Millan Puelles
* Milly Witkop
* Mimamsa
* Mimāṃsā
* Mimesis
* Minarchism
* Mind
* Mind's eye
* Mind-body problem
* Mind–body dichotomy
* Mind & Language
* Mind (journal)
* Mind children
* Mind extension
* Mind over matter
* Minds, Machines and Gödel
* Mindset
* Mindstream
* Ming Dynasty
* Mingei
* Minima Moralia
* Minimal decency
* Minimalism
* Minimax
* Minimax strategy
* Minimum Intelligent Signal Test
* Minimum programme
* Minkowski space-time
* Minor premise
* Minor term
* Minority (philosophy)
* Minors and abortion
* Minos (dialogue)
* Mir Damad
* Mir Fendereski
* Miracle
* Miracle of the roses
* Miran Božovič
* Miranda Fricker
* Mircea Eliade
* Mircea Eliade bibliography
* Mirosław Dzielski
* Mirror stage
* Mirror test
* Misanthropy
* Misinformation effect
* Miskawayh
* Misleading vividness
* Misology
* Misopogon
* Misotheism
* Mitchell Miller (philosopher)
* Mitchell Thomashow
* Miura Baien
* Miyabi
* Mladen Dolar
* Mnason of Phocis
* Mnesarchus of Athens
* Mo Ti
* Mo Tzu
* Mochus
* Modal fictionalism
* Modal logic
* Modal operator
* Modal property
* Modal realism
* Modalities (sociology)
* Modality
* Mode of production
* Model (abstract)
* Model theory
* Models of scientific inquiry
* Moderate objectivism
* Moderate realism
* Moderation
* Moderatus of Gades
* Modern liberalism in the United States
* Modern Moral Philosophy
* Modern philosophy
* Modern Physics and Ancient Faith
* Modern School (United States)
* Modernism
* Modernity
* Modesty
* Modistae
* Modjtaba Sadria
* Modor
* Modular constructivism
* Modularity
* Modularity of mind
* Modus ponendo tollens
* Modus ponens
* Modus tollendo ponens
* Modus tollens
* Mohamed Osman Elkhosht
* Mohammad Baqir al-Sadr
* Mohammad Ibn Abd-al-Haq Ibn Sab’in
* Mohammad Taghi Jafari
* Mohammed Abed al-Jabri
* Mohammed Aziz Lahbabi
* Mohammed Chaouki Zine
* Mohammed Sabila
* Mohandas Karamchand Gandhi
* Mohism
* Mohist philosophy
* Mohist School
* Moishe Tokar
* Mojżesz Presburger
* Moksa (Jainism)
* Moksha
* Molecular biology
* Molinism
* Molyneux's Problem
* Molyneux problem
* Molyneux question
* Monad
* Monad (Greek philosophy)
* Monadic predicate calculus
* Monadology
* Monarchomachs
* Monetary reform
* Monimus
* Monism
* Monistic idealism
* Monopoly on violence
* Monotheism
* Monotonic
* Monroe Beardsley
* Montague grammar
* Montanism
* Montanus
* Monte Carlo fallacy
* Montesquieu
* Monty Hall problem
* Mood (psychology)
* Moore's paradox
* Moral
* Moral absolutism
* Moral agency
* Moral agent
* Moral agents
* Moral certainty
* Moral character
* Moral community
* Moral core
* Moral development
* Moral dilemma
* Moral dilemmas
* Moral economy
* Moral education
* Moral epistemology
* Moral equivalence
* Moral evil
* Moral example
* Moral hazard
* Moral hierarchy
* Moral high ground
* Moral imperative
* Moral judgment
* Moral law
* Moral luck
* Moral motivation
* Moral nihilism
* Moral non-naturalism
* Moral objectivism
* Moral obligation
* Moral panic
* Moral particularism
* Moral perception
* Moral philosophy
* Moral pluralism
* Moral psychology
* Moral rationalism
* Moral realism
* Moral reasoning
* Moral relativism
* Moral responsibility
* Moral scepticism
* Moral sense
* Moral sense theory
* Moral skepticism
* Moral status of animals in the ancient world
* Moral subjectivism
* Moral syncretism
* Moral treatment
* Moral universalism
* Moralism
* Moralistic fallacy
* Morality
* Morality play
* Morality without religion
* Moralium dogma philosophorum
* Morals
* Morals by Agreement
* Moravec's paradox
* Mordecai Kaplan
* Mores
* Moritz Carrière
* Moritz Geiger
* Moritz Lazarus
* Moritz Schlick
* Morphological freedom
* Morris Weitz
* Mortalism
* Morteza Motahhari
* Mortimer J. Adler
* Morton White
* Mos maiorum
* Moscow Conceptualists
* Moses Ben Jacob Ibn Ezra
* Moses ben Joshua
* Moses ben Maimon
* Moses ben Nahman
* Moses Hess
* Moses ibn Ezra
* Moses Ibn Ezra
* Moses Maimonides
* Moses Mendelssohn
* Moses Nahmanides
* Moses Schönfinkel
* Moshé Machover
* Mostafa Malekian
* Motion (physics)
* Motivation
* Motivational internalism
* Motoori Norinaga
* Mottainai
* Mou Zongsan
* Movement Against the Monarchy
* Movement of Animals
* Moving the goalpost
* Mozi
* Mr. Palomar
* Mu'ayyad fi'l-Din al-Shirazi
* Mu'tazila
* Muhammad 'Abduh
* Muhammad Abduh
* Muhammad Ali Siddiqui
* Muhammad Baqir Mir Damad
* Muhammad Husayn Tabatabaei
* Muhammad ibn Muhammad Tabrizi
* Muhammad ibn Zakariya al-Razi
* Muhammad Iqbal
* Muhammed Hamdi Yazır
* Muhsen Feyz Kashani
* Muirhead Library of Philosophy
* Mujeres Libres
* Mujo
* Mujō
* Mūlamadhyamakakārikā
* Mulla Hadi Sabzevari
* Mulla Sadra
* Multi-criteria decision analysis
* Multi-valued logic
* Multicultural particularism
* Multiculturalism
* Multimodal logic
* Multiperspectivalism
* Multiple-conclusion logic
* Multiple discovery
* Multiple Drafts Model
* Multiple realizability
* Multiple time dimensions
* Multiplicity (philosophy)
* Multitude
* Multitudes (journal)
* Multiverse
* Mumbo Jumbo (phrase)
* Münchhausen trilemma
* Mundane reason
* Munich phenomenology
* Muro Kyūsō
* Murray Bookchin
* Murray Clarke
* Murray Rothbard
* Musa al-Sadr
* Musa Ibn Maimon
* Music
* Musica universalis
* Musical historicism
* Musicology
* Musonius Rufus
* Mussar movement
* Mutatis mutandis
* Mutual aid (organization theory)
* Mutual Aid: A Factor of Evolution
* Mutual liberty
* Mutualism (economic theory)
* Mutually exclusive events
* My Philosophical Development
* Myia
* Mykhailo Drahomanov
* Mylan Engel
* Myles Burnyeat
* Myles Frederic Burnyeat
* Myōe
* Myson of Chenae
* Mysterium Cosmographicum
* Mystical experience
* Mystical philosophy of antiquity
* Mystical realism
* Mystical theology
* Mysticism
* Myth of Er
* Myth of Progress
* Myth of the given
* Mythologies (book)
* Mythos (Aristotle)

## N

* N-tuple
* Nabat
* Nachman Krochmal
* Nader El-Bizri
* Nae Ionescu
* Nagarjuna
* Nāgārjuna
* Nahmanides
* Naïve empiricism
* Naive realism
* Naïve realism
* Najmuddin Kubra
* Nakae Chōmin
* Nalin de Silva
* Namarupa
* Name
* Name calling
* Names
* Naming and Necessity
* Namus
* Nancey Murphy
* Nancy Cartwright (philosopher)
* Narayana Guru
* Narhar Ambadas Kurundkar
* Naropa
* Narrative
* Nasir al-Din al-Tusi
* Nasir Khusraw
* Nassim Nicholas Taleb
* Nasty, brutish, and short
* Nate Ackerman
* Nathan Birnbaum
* Nathan Salmon
* Nathaniel Culverwell
* Nation
* National-Anarchism
* National character
* National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research
* National Federation of Atheist, Humanist and Secular Student Societies
* National Research Act
* National Secular Society
* Nationalism
* Nationalism and Culture
* Nationalism studies
* Nations and Nationalism
* Nativism
* Natura naturans
* Natura naturata
* Natura non facit saltus
* Natural (disambiguation)
* Natural and legal rights
* Natural deduction
* Natural Design
* Natural evil
* Natural justice
* Natural kind
* Natural language
* Natural law
* Natural laws
* Natural light
* Natural morality
* Natural number
* Natural order (philosophy)
* Natural philosophy
* Natural religion
* Natural right
* Natural rights
* Natural selection
* Natural sign
* Natural slavery
* Natural Supernaturalism
* Natural theology
* Naturales quaestiones
* Naturalism
* Naturalism (arts)
* Naturalism (philosophy)
* Naturalistic fallacy
* Naturalistic pantheism
* Naturalization
* Naturalized epistemology
* Nature
* Nature (essay)
* Nature (innate)
* Nature (philosophy)
* Nature of God
* Nature versus nurture
* Naturphilosophie
* Naturwissenschaften
* Nausea (novel)
* Nausiphanes
* Navya-Nyāya
* Necessary and sufficient condition
* Necessary and sufficient conditions
* Necessary being
* Necessary condition
* Necessary truth
* Necessitarianism
* Necessity
* Ned Block
* Needs
* Neetham
* NEFAC
* Negarchy
* Negation
* Negative and positive rights
* Negative capability
* Negative Dialectics
* Negative feedback
* Negative freedom
* Negative liberty
* Negative rights
* Negative theology
* Negativity effect
* Neglect of probability
* Negotiation
* Negritude
* Neil Gillman
* Neil MacCormick
* Neil Tennant (philosopher)
* Neither Victims Nor Executioners
* Nel Noddings
* Neleus of Scepsis
* Nelly Richard
* Nelly Roussel
* Nelson Goodman
* Nemesius
* Nemesius of Emesa
* Neo-Aristotelianism (philosophy)
* Neo-conceptual art
* Neo-Confucianism
* Neo-Dada
* Neo-expressionism
* Neo-figurative
* Neo-Futurists
* Neo-Kantianism
* Neo-Luddism
* Neo-medievalism
* Neo-Objectivism
* Neo-pop
* Neo-primitivism
* Neo-Pythagoreanism
* Neo-romanticism
* Neo-Scholasticism
* Neo-theocracy
* Neo-Thomism
* Neoclassicism
* Neocolonial Dependence
* Neofunctionalism (sociology)
* Neomodern
* Neomodernism
* Neonatal perception
* Neoplatonism
* Neoplatonism and Christianity
* Neoplatonism and Gnosticism
* Neopragmatism
* Neopythagoreanism
* Neostoicism
* Neotribalism
* Nespelem (art)
* Néstor García Canclini
* Nestor Makhno
* Neti neti
* Netocracy
* Neue Slowenische Kunst
* Neural correlate
* Neural Darwinism
* Neural net
* Neurath's boat
* Neuroesthetics
* Neuroethics
* Neuromantic (Philosophy)
* Neurophenomenology
* Neurophilosophy
* Neuroscience
* Neutral monism
* Neutrality (philosophy)
* Neven Sesardic
* New Academy
* New Age
* New Confucianism
* New Democracy
* New England Reformers
* New England transcendentalism
* New England Transcendentalists
* New Essays on Human Understanding
* New Federalism
* New Foundations
* New historicism
* New legal realism
* New Libertarian Manifesto
* New mysterianism
* New Objectivity
* New Philosophers
* New realism
* New realism (philosophy)
* New religious movement
* New Revolutionary Alternative
* New Right
* New Sincerity
* New Thought
* New Times (politics)
* New Wittgenstein
* New York Figurative Expressionism
* Newcomb's paradox
* Newcomb's problem
* Newspeak
* Newton's flaming laser sword
* Newton da Costa
* Newtonian
* Newtonianism
* Niall Shanks
* Nicarete of Megara
* Niccolò Cabeo
* Niccolò Machiavelli
* Nichiren
* Nicholas Agar
* Nicholas Hill (scientist)
* Nicholas Kalliakis
* Nicholas Krebs
* Nicholas Kryfts
* Nicholas Leonicus Thomaeus
* Nicholas Maxwell
* Nicholas of Autrecourt
* Nicholas of Cusa
* Nicholas of Kues
* Nicholas Onufrievich Lossky
* Nicholas Rescher
* Nicholas Wolterstorff
* Nick Bostrom
* Nick Land
* Nick Ribush
* Nick Trakakis
* Nicla Vassallo
* Nicola Abbagnano
* Nicola Antonio Stigliola
* Nicolai A. Vasiliev
* Nicolai Hartmann
* Nicolás Gómez Dávila
* Nicolas Malebranche
* Nicolaus Copernicus
* Nicolaus Hieronymus Gundling
* Nicolaus of Damascus
* Nicolaus Taurellus
* Nicole C. Karafyllis
* Nicole Oresme
* Nicoletto Vernia
* Nicomachean Ethics
* Nicomachus
* Nicomachus (son of Aristotle)
* Nida Vasiliauskaitė
* Niels Bohr
* Niels Treschow
* Nietzsche's views on women
* Nietzsche-Archiv
* Nietzsche and free will
* Nietzsche and Philosophy
* Nietzsche contra Wagner
* Nietzschean affirmation
* Nigel Warburton
* Nigidius Figulus
* Nihilism
* Nihilist paradox
* Nikephoros Choumnos
* Nikola Milošević (politician)
* Nikolai Berdyaev
* Nikolai Bugaev
* Nikolai Fedorovich Federov
* Nikolai Fëdorovich Fëderov
* Nikolai Fyodorovich Fyodorov
* Nikolai Konstantinovich Mikhailovskii
* Nikolai Lobachevsky
* Nikolai Lossky
* Nikolai Putyatin
* Nikolas Kompridis
* Nikolay Chernyshevsky
* Nikolay Strakhov
* Nikos Kazantzakis
* Nimbarka
* Nina Karin Monsen
* Nine Noble Virtues
* Nino Cocchiarella
* Ninth Letter (Plato)
* Nirvana
* Nirvana (Jainism)
* Nirvana fallacy
* Nishi Amane
* Nishida Kitaro
* Nishida Kitarō
* Nishitani Keiji
* Nishkam Karma
* No Exit
* No true Scotsman
* Noam Chomsky
* Noam Chomsky's political views
* Noble Eightfold Path
* Noble lie
* Noble savage
* Nocebo
* Noe Ito
* Noël Carroll
* Noema
* Noesis (phenomenology)
* Noetics
* Noise
* Nomenclature
* Nominal definition
* Nominalism
* Nominalization
* Nomological danglers
* Nomos
* Nomothetic
* Nomothetic and idiographic
* Non-archimedean time
* Non-Aristotelian logic
* Non-classical logic
* Non-cognitivism
* Non-essentialism
* Non-Euclidean geometry
* Non-heart-beating donation
* Non-monotonic logic
* Non-philosophy
* Non-physical entity
* Non-politics
* Non-rigid designator
* Non-standard analysis
* Non-standard model
* Non-voting
* Non causa pro causa
* Non sequitur (logic)
* Nona L. Brooks
* Noncognitivism
* Noncontracting grammar
* Nondualism
* Noneism
* Nonfirstorderizability
* Nonmaleficence
* Nonsense
* Nontheism
* Nontheist Friend
* Nonviolence
* Noogony
* Noology
* Noosphere
* Norbert Bolz
* Norbert Leser
* Norberto Bobbio
* Nordic Journal of Philosophical Logic
* Norm (philosophy)
* Norm (sociology)
* Norm Daniels
* Norm of reciprocity
* Normal
* Normal form
* Normalization
* Norman Daniels
* Norman Geisler
* Norman Kemp Smith
* Norman Kretzmann
* Norman Malcolm
* Norman Melchert
* Norman Robert Campbell
* Norman Swartz
* Normative
* Normative ethics
* Normative science
* Normative statement
* Normlessness
* Northrop Frye
* Northwest School (art)
* Norwich School (art movement)
* Norwood Russell Hanson
* Nos, Book of the Resurrection
* Not even wrong
* Notation
* Notations
* Notes on "Camp"
* Nothing
* Nothingness
* Notion
* Notion (philosophy)
* Noumena
* Noumenon
* Nous
* Noûs
* Novalis
* Novum Organum
* Now and After
* Nuccio Ordine
* Núcleo de Estudos em Ética e Desconstrução
* Nuel Belnap
* Number
* Number theory
* Numenius
* Numenius of Apamea
* Numerical identity
* Numinous
* NuPRL
* Nur Ali Elahi
* Nuremberg Code
* Nursing ethics
* Nyaya
* Nyāya
* Nyāya Sūtras
* NYC Ya Basta Collective
* Nymphidianus of Smyrna

## O

* Oath
* Oath of Asaph
* Obedience (human behavior)
* Object (philosophy)
* Object of the mind
* Objectification
* Objection (argument)
* Objective idealism
* Objective precision
* Objective reality
* Objectivism
* Objectivism: The Philosophy of Ayn Rand
* Objectivist movement
* Objectivist movement in India
* Objectivist philosophy
* Objectivist theory of value
* Objectivity (philosophy)
* Objectivity (science)
* Objet petit a
* Obligation
* Obscurantism
* Observation
* Observations on Man
* Observations on the Feeling of the Beautiful and Sublime
* Observer-expectancy effect
* Observer effect
* Obversion
* Occam's razor
* Occasion of sin
* Occasionalism
* Occurrent belief
* Ocellus Lucanus
* Ockham's razor
* Octave Garnier
* Octave Hamelin
* Octave Mirbeau
* Octavio Paz
* October (journal)
* Odium theologicum
* Odo of Châteauroux
* Oeconomicus
* Oedipus Rex
* Oenomaus of Gadara
* Oets Kolk Bouwsma
* Of Grammatology
* Of Miracles
* Of the Conduct of the Understanding
* Ogyū Sorai
* Okishio's theorem
* Olaf Helmer
* Olaf Stapledon
* Olavo de Carvalho
* Oleksiy Onyschenko
* Olga Hahn-Neurath
* Olga Taratuta
* Oligarchy
* Oliver Franks, Baron Franks
* Oliver Leaman
* Oliver Letwin
* Oliver Wendell Holmes Jr.
* Olympiodorus the Elder
* Olympiodorus the Younger
* Omar Khayyám
* Omega
* Omega-consistent
* Omega-regular language
* Omega language
* Omega Point
* Omission
* Omission bias
* Omnibenevolence
* Omnipotence
* Omnipotence paradox
* Omnipresence
* Omniscience
* Omphalos hypothesis
* On Ayn Rand
* On Breath
* On Bullshit
* On Certainty
* On Colors
* On Contradiction (Mao Zedong)
* On Denoting
* On Divination in Sleep
* On Dreams
* On Formally Undecidable Propositions of Principia Mathematica and Related Systems
* On Generation and Corruption
* On Indivisible Lines
* On Length and Shortness of Life
* On Liberty
* On Marvellous Things Heard
* On Melissus, Xenophanes, and Gorgias
* On Memory
* On Nature
* On Plants
* On Sleep
* On the Basis of Morality
* On the Bondage of the Will
* On the Concept of Irony with Continual Reference to Socrates
* On the Fourfold Root of the Principle of Sufficient Reason
* On the Freedom of the Will
* On the Genealogy of Morality
* On the Heavens
* On the Plurality of Worlds
* On the Poverty of Student Life
* On the Soul
* On the Universe
* On Things Heard
* On Truth
* On Truth and Lies in a Nonmoral Sense
* On Virtues and Vices
* On Vision and Colors
* On Youth, Old Age, Life and Death, and Respiration
* Onasander
* Onatas (philosopher)
* One-sided argument
* Onesicritus
* Onora O'Neill
* Onora O'Neill, Baroness O'Neill of Bengarve
* Ontic
* Onto-theology
* OntoClean
* Ontological argument
* Ontological argument for the existence of God
* Ontological commitment
* Ontological maximalism
* Ontological paradox
* Ontological pluralism
* Ontological security
* Ontologism
* Ontology
* Ontology alignment
* Ontotheology
* Op art
* Opaque context
* Open government
* Open-ended question
* Open individualism
* Open-question argument
* Open sentence
* Open society
* Open source
* Open texture
* Open world assumption
* Openness
* Operant conditioning
* Operational definition
* Operationalism
* Operationalization
* Opinion
* Opium of the people
* Opportunity cost
* Oppression
* Optics
* Optimism
* Optimism bias
* Or Adonai
* Oration on the Dignity of Man
* Orch-OR
* Orchot Tzaddikim
* Ordered n-tuple
* Ordered pair
* Ordered set
* Ordinal utility
* Ordinary-language philosophy
* Ordinary and extraordinary care
* Ordinary language
* Ordinary language philosophy
* Orestes Brownson
* Organ donation
* Organ donation in Jewish law
* Organic (model)
* Organic composition of capital
* Organic law
* Organic society
* Organic statute
* Organic unity
* Organic work
* Organicism
* Organism
* Organizational ethics
* Organizing principle
* Organon
* Oriental despotism
* Orientalism
* Orientalism (book)
* Origen
* Origen the Pagan
* Origin of Consciousness in the Breakdown of the Bicameral Mind
* Original intent
* Original meaning
* Original position
* Original proof of Gödel's completeness theorem
* Original sin
* Originalism
* Orlando J. Smith
* Orpheus
* Orphism
* Orphism (art)
* Orphism (religion)
* Orthodox Trotskyism
* Orthogenesis
* Orthotes
* Oscar Wilde
* Oskar Becker
* Oskar Ewald
* Oskar Kraus
* Oskar Negt
* Osmund Lewry
* Ostension
* Ostensive definition
* Osvaldo Lira
* Oswald Hanfling
* Oswald Spengler
* Otfried Höffe
* Other (philosophy)
* Other minds
* Other minds problem
* Othmar Spann
* Otto Bauer
* Otto Buek
* Otto Friedrich Bollnow
* Otto Friedrich Gruppe
* Otto Kirchheimer
* Otto Liebmann
* Otto Mencke
* Otto Neurath
* Otto Selz
* Otto von Gierke
* Otto Weininger
* Ought
* Ought-is
* Ought-is distinction
* Ought-is problem
* Ought and is
* Our Generation
* Our Posthuman Future
* Ousia
* Out-group homogeneity bias
* Outcome bias
* Outlaw
* Outline of anarchism
* Outline of critical theory
* Outline of epistemology
* Outline of humanism
* Outline of logic
* Outline of philosophy
* Outline of theology
* Over-soul
* Overbelief
* Overconfidence effect
* Overdetermination
* Overlapping consensus
* Overproduction
* Overwhelming exception
* Owen Barfield
* Owen Flanagan
* Owenism
* Owl of Minerva
* Ownership
* Oxford Calculators
* Oxford Franciscan school
* Oxford Literary Review

## P

* P. D. Ouspensky
* P. F. Strawson
* P. G. Winch
* Pacific Philosophical Quarterly
* Pacific Street Films
* Pacificism
* Pacifism
* Pacifism as Pathology: Notes on an American Pseudopraxis
* Package-deal fallacy
* Paconius Agrippinus
* Padmapadacharya
* Padmasambhava
* Pain
* Pain (philosophy)
* Paired opposites
* Pakistani philosophy
* Paleoconservatism
* Palingenesis
* Páll Skúlason
* Palla Strozzi
* Pamela Sue Anderson
* Pamprepius
* Pan-Africanism
* Pan-Slavism
* Pan Pingge
* Panaetius
* Panagiotis Kondylis
* Panait Cerna
* Panarchism
* Panayot Butchvarov
* Pancrates of Athens
* Pancritical rationalism
* Pandeism
* Panentheism
* Panic Movement
* Panlogism
* Panopticon
* Panpsychism
* Panrationalism
* Pantheism
* Pantheism controversy
* Panthoides
* Pantisocracy
* Paola Cavalieri
* Paolo da Pergola
* Paolo Virno
* Papunya Tula
* Parable of the Invisible Gardener
* Paracelsus
* Paraconsistency
* Paraconsistent logic
* Parade of horribles
* Paradigm
* Paradigm shift
* Paradox
* Paradox of analysis
* Paradox of hedonism
* Paradox of the Court
* Paradox of the heap
* Paradox of the stone
* Paradox of tolerance
* Paradoxes
* Paradoxes of material implication
* Paradoxes of set theory
* Paradoxology
* Paragone
* Paralanguage
* Parallel distributed processing
* Parallel universe
* Parallelism
* Paramartha
* Pāramitā
* Paranormal phenomena
* Paraphrasis
* Parapsychology
* Pareidolia
* Parenting For Everyone
* Pareto efficiency
* Pareto optimality
* Pareto principle
* Paris Commune
* Park Yeol
* Parmenides
* Parmenides (dialogue)
* Parmenides Foundation
* Parousia
* Parrhesia
* Pars destruens/pars construens
* Parse tree
* Parsimony
* Parsing
* Part-whole theory
* Partial function
* Partial order
* Partial ordering
* Participation
* Participation (philosophy)
* Participatory democracy
* Participatory theory
* Particle physics
* Particular
* Particular proposition
* Particularism
* Particulars
* Partido por la Victoria del Pueblo
* Partiinost'
* Partition
* Partonomy
* Parts of Animals
* Parva Naturalia
* Pascal's wager
* Pascal's Wager
* Pascal Engel
* Pasicles of Thebes
* Pasquale Galluppi
* Passions (philosophy)
* Passions of the Soul
* Passive euthanasia
* Passive intellect
* Past
* Pastiche
* Patañjali
* 'Pataphysics
* Paternalism
* Pathetic fallacy
* Pathological fascism
* Pathological science
* Pathos
* Patience
* Patient advocacy
* Patient safety
* Patri Friedman
* Patriarch Gennadios II of Constantinople
* Patriarchalism
* Patricia Churchland
* Patricia Russell (nee Spence)
* Patrick Benedict Zimmer
* Patrick Edward Dove
* Patrick Suppes
* Patro the Epicurean
* Pattern
* Pau Sabater
* Paul-Henri-Dietrich d'Holbach
* Paul-Henri Thiry, Baron d'Holbach
* Paul-Louis Couchoud
* Paul A. Freund
* Paul Avrich
* Paul Benacerraf
* Paul Bernays
* Paul Boghossian
* Paul Carus
* Paul Chamberlain
* Paul Churchland
* Paul Cobben
* Paul Copan
* Paul de Man
* Paul Deussen
* Paul Draper (philosopher)
* Paul Edwards (philosopher)
* Paul Erdős
* Paul Feyerabend
* Paul Fletcher (theologian)
* Paul Gerhard Natorp
* Paul Gochet
* Paul Grice
* Paul Guyer
* Paul Häberlin
* Paul Hensel
* Paul Horwich
* Paul Humphreys (philosopher)
* Paul J. Griffiths
* Paul Janet
* Paul Karl Feyerabend
* Paul Kurtz
* Paul Lorenzen
* Paul Moser
* Paul Natorp
* Paul Nizan
* Paul Nougé
* Paul of Venice
* Paul R. Patton
* Paul Ramsey (ethicist)
* Paul Ree
* Paul Rée
* Paul Ricoeur
* Paul Ricœur
* Paul Russell (philosopher)
* Paul Taylor (philosopher)
* Paul Thagard
* Paul Tillich
* Paul Virilio
* Paul Weiss (philosopher)
* Paul Woodruff
* Paul Yorck von Wartenburg
* Paul Ziff
* Paulin J. Hountondji
* Paulo Cesar Duque-Estrada
* Paulo Freire
* Paulus Persa
* Paulus Venetus
* Pavel Aleksandrovich Florenskii
* Pavel Florensky
* Pavel Tichý
* Peace
* Peace in Islamic philosophy
* Peacekeeping
* Peak–end rule
* Peano axioms
* Peano postulates
* Pedro da Fonseca (philosopher)
* Pedro Hurtado de Mendoza
* Peirce's law
* Pekka Himanen
* Pelagianism
* Pelagius
* Pema Chödrön
* Penelope Mackie
* Penelope Maddy
* Pennsylvania Impressionism
* Pensées
* Pension spiking
* Pentti Linkola
* People (disambiguation)
* Pepita Carpeña
* Per Bauhn
* Per Martin-Löf
* Percept
* Perception
* Percepts
* Perceptual paradox
* Percy Williams Bridgman
* Perdurance
* Perdurantism
* Peregrinus Proteus
* Perennial philosophy
* Perfect competition
* Perfect solution fallacy
* Perfection
* Perfection (concept)
* Perfection (disambiguation)
* Perfectionism (philosophy)
* Performance
* Performative
* Performative contradiction
* Performative text
* Performative utterance
* Performative utterances
* Performatives
* Performativity
* Performing art
* Perictione
* Peripatetic axiom
* Peripatetic school
* Peripatetics
* Peripatos
* Peritrope
* Periyar E. V. Ramasamy
* Perlocutionary act
* Permanent war economy
* Permission (philosophy)
* Perpetual peace
* Persaeus
* Persecution
* Persecution and the Art of Writing
* Persecution of philosophers
* Persian Letters
* Persian Psalms
* Persistence
* Person
* Personal horizon
* Personal identity
* Personal life
* Personal life of Marcus Tullius Cicero
* Personalism
* Personhood
* Persons
* Perspectival realism
* Perspective (cognitive)
* Perspectives on Anarchist Theory
* Perspectivism
* Persuasive definition
* Persuasive technology
* Perverse incentive
* Perversion
* Pessimism
* Pessimistic induction
* Peter A. Singer
* Peter Abelard
* Peter Achinstein
* Peter Arshinov
* Peter Aureol
* Peter B. Andrews (mathematician)
* Peter Bieri (author)
* Peter Browne (theologian)
* Peter Carruthers (philosopher)
* Peter Caws
* Peter Ceffons
* Peter Crockaert
* Peter D. Klein
* Peter Damian
* Peter de Rivo
* Peter Deunov
* Peter Dews
* Peter F. Strawson
* Peter Frederick Strawson
* Peter Geach
* Peter Gelderloos
* Peter Glassen
* Peter Godfrey-Smith
* Peter Goldie
* Peter Hacker
* Peter Hallward
* Peter Helias
* Peter Janich
* Peter John Olivi
* Peter Joseph Elvenich
* Peter Kaufmann (philosopher)
* Peter Kingsley
* Peter Kreeft
* Peter Kropotkin
* Peter Lavrovich Lavrov
* Peter Lipton
* Peter Lombard
* Peter Ludlow
* Peter Lunenfeld
* Peter Millican
* Peter Munz
* Peter Ochs
* Peter of Ailly
* Peter of Auvergne
* Peter of Capua the Elder
* Peter of Corbeil
* Peter of Poitiers
* Peter of Spain
* Peter Olivi
* Peter Pagin
* Péter Pázmány
* Peter Railton
* Peter Serracino Inglott
* Peter Simons
* Peter Singer
* Peter Sloterdijk
* Peter Steinberger
* Peter Stephen Du Ponceau
* Peter Stillman (academic)
* Peter Strawson
* Peter Suber
* Peter the Iberian
* Peter Thielst
* Peter Thomas Geach
* Peter Tudvad
* Peter Unger
* Peter Vallentyne
* Peter van Inwagen
* Peter Vardy (theologian)
* Peter Wenz
* Peter Wessel Zapffe
* Peter Winch
* Petitio principii
* Petr Alekseevich Kropotkin
* Pëtr Alekseevich Kropotkin
* Petr Lavrovich Lavrov
* Pëtr Lavrovich Lavrov
* Petrarch
* Petre Ţuţea
* Petrick's method
* Petrus Aureolus
* Petrus de Ibernia
* Petrus Ramus
* Phaedo
* Phaedo of Elis
* Phaedrus (dialogue)
* Phaedrus the Epicurean
* Phaleas of Chalcedon
* Phallogocentrism
* Phaneron
* Phanias of Eresus
* Phanto of Phlius
* Phase space
* Phenomena
* Phenomenal
* Phenomenal conservatism
* Phenomenalism
* Phenomenological definition of God
* Phenomenological life
* Phenomenological reduction
* Phenomenological Sociology
* Phenomenology (philosophy)
* Phenomenology of essences
* Phenomenology of Perception
* Phenomenology of religion
* Phenomenon
* Pherecydes of Syros
* Phi Sigma Tau
* Philanthropreneur
* Philanthropy
* Philebus
* Philia
* Philip Berrigan
* Philip Faber
* Philip Grosser
* Philip H. Rhinelander
* Philip Hallie
* Philip II of Macedon
* Philip Jourdain
* Philip Kitcher
* Philip L. Quinn
* Philip Melanchthon
* Philip Mirowski
* Philip of Opus
* Philip Pettit
* Philip the Chancellor
* Philip Wheelwright
* Philip Willem van Heusde
* Philipp Albert Stapfer
* Philipp Frank
* Philipp Mainländer
* Philipp Melanchthon
* Philippa Foot
* Philippa R. Foot
* Philippe Devaux
* Philippe Lacoue-Labarthe
* Philippe Nys
* Philippe Van Parijs
* Philiscus of Aegina
* Philiscus of Thessaly
* Philistinism
* Philistus
* Phillip Cary
* Phillip H. Wiebe
* Philo
* Philo's view of God
* Philo's Works
* Philo (journal)
* Philo Judaeus
* Philo of Alexandria
* Philo of Larissa
* Philo the Dialectician
* Philo the Megarian
* Philodemus
* Philolaus
* Philonides of Laodicea
* Philoponus
* Philosophaster
* Philosophe
* Philosopher
* Philosopher's axe
* Philosopher's Axe
* Philosopher's football
* Philosopher's Football
* Philosopher's stone
* Philosopher's Stone
* Philosopher's Walk
* Philosopher's wool
* Philosopher-king
* Philosopher Han Xiang
* Philosopher king
* Philosopher Kings
* Philosopher of history
* Philosopher of science
* Philosopher stone
* Philosophers
* Philosophers' Football
* Philosophers' Imprint
* Philosophers' stone
* Philosophers Football Match
* Philosophes
* Philosophia Africana
* Philosophia perennis
* Philosophiae Naturalis Principia Mathematica
* Philosophic
* Philosophic school
* Philosophic sin
* Philosophical
* Philosophical analysis
* Philosophical anarchism
* Philosophical anthropology
* Philosophical arguments for censorship
* Philosophical aspects of the abortion debate
* Philosophical Consultancy
* Philosophical counseling
* Philosophical Counseling
* Philosophical dictionaries and encyclopaedias
* Philosophical dictionaries and encyclopedias
* Philosophical Dictionary
* Philosophical Explanations
* Philosophical Explorations
* Philosophical fiction
* Philosophical Foundations of Marxist-Leninist Atheism
* Philosophical Fragments
* Philosophical Gourmet
* Philosophical Gourmet Report
* Philosophical idealism
* Philosophical Inquiries into the Essence of Human Freedom
* Philosophical interpretation of classical physics
* Philosophical introspection
* Philosophical intuition
* Philosophical Investigations
* Philosophical Investigations (journal)
* Philosophical Issues
* Philosophical journals
* Philosophical language
* Philosophical logic
* Philosophical method
* Philosophical Method
* Philosophical method/Introduction
* Philosophical movement
* Philosophical Movements
* Philosophical naturalism
* Philosophical naturalist
* Philosophical novel
* Philosophical Perspectives
* Philosophical pessimism
* Philosophical presentism
* Philosophical problems of testimony
* Philosophical progress
* Philosophical Psychology (journal)
* Philosophical Radicals
* Philosophical realism
* Philosophical scepticism
* Philosophical School of Elis
* Philosophical schools
* Philosophical sin
* Philosophical skepticism
* Philosophical Studies
* Philosophical subdisciplines
* Philosophical Subdisciplines
* Philosophical theism
* Philosophical theology
* Philosophical theories
* Philosophical theory
* Philosophical Topics
* Philosophical Transactions
* Philosophical view
* Philosophical View
* Philosophical Writings
* Philosophical zombie
* Philosophie Zoologique
* Philosophies
* Philosophy
* Philosophy (journal)
* Philosophy and literature
* Philosophy and Literature
* Philosophy and Phenomenological Research
* Philosophy and Public Affairs
* Philosophy and Real Politics
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* Phrase structure
* Phronesis
* Physical attractiveness
* Physical body
* Physical law
* Physical ontology
* Physical symbol system
* Physicalism
* Physician-assisted suicide
* Physician–patient privilege
* Physics (Aristotle)
* Physics envy
* Physiognomonics
* Physis
* Pi
* Picture language
* Picture superiority effect
* Pictures
* Picturesque
* Pien
* Pieranna Garavaso
* Piergiorgio Odifreddi
* Pierre-André Taguieff
* Pierre-Joseph Proudhon
* Pierre-Maurice-Marie Duhem
* Pierre-Simon Ballanche
* Pierre-Simon Laplace
* Pierre-Simon, Marquis de Laplace
* Pierre-Sylvain Regis
* Pierre-Sylvain Régis
* Pierre Abailard
* Pierre Abélard
* Pierre Bayle
* Pierre Besnard
* Pierre Bourdieu
* Pierre Boutang
* Pierre Cally
* Pierre Charron
* Pierre d'Ailly
* Pierre Daniel Huet
* Pierre de Bar
* Pierre de la Ramee
* Pierre de la Ramée
* Pierre Duhem
* Pierre Eugene du Simitiere
* Pierre Gassendi
* Pierre Hadot
* Pierre Hyacinthe Azais
* Pierre Jean George Cabanis
* Pierre Klossowski
* Pierre La Ramee
* Pierre La Ramée
* Pierre Laffitte
* Pierre Laromiguière
* Pierre Lecomte du Noüy
* Pierre Leroux
* Pierre Lévy (philosopher)
* Pierre Manent
* Pierre Maurice Marie Duhem
* Pierre Monatte
* Pierre Nicole
* Pierre Paul Royer-Collard
* Pierre Teilhard de Chardin
* Piers Benn
* Pietas (virtue)
* Pieter Nicolaas van Eyck
* Pietism
* Pietro Alcionio
* Pietro d'Abano
* Pietro Pomponazzi
* Pietro Ubaldi
* Pietro Verri
* Piety
* Pineal gland
* Pio Colonnello
* Pioneers of American Freedom
* Piotr Chmielowski
* Piotr Lenartowicz
* Pirate utopia
* Pirmin Stekeler-Weithofer
* Pirsig's metaphysics of Quality
* Pistis
* Pistolerismo
* Pity
* Piya Tan
* Placebo
* Placide Tempels
* Plagiarism
* Plane of immanence
* Plane Stupid
* Plank of Carneades
* Planned economy
* Planned obsolescence
* Planning fallacy
* Plasticien
* Platform Sutra
* Platformism
* Plato
* Plato's allegory of the cave
* Plato's divided line
* Plato's Dream
* Plato's five regimes
* Plato's four cardinal virtues
* Plato's metaphor of the Sun
* Plato's number
* Plato's Problem
* Plato's Republic
* Plato's tripartite theory of soul
* Plato and a Platypus Walk Into a Bar
* Platonic Academy
* Platonic Academy (Florence)
* Platonic epistemology
* Platonic form
* Platonic idealism
* Platonic love
* Platonic realism
* Platonism
* Platonism in the Renaissance
* Plausibility
* Playing God (ethics)
* Pleasure
* Pleasure principle (psychology)
* Plenist
* Plenitude principle
* Plenitude
* Pleonexia
* Pleroma
* Pliny the Elder
* Pliny the Younger
* Plotinus
* Plural quantification
* Pluralism (philosophy)
* Pluralism (political philosophy)
* Pluralist school
* Pluralist theories of truth
* Plutarch
* Plutarch of Athens
* Plutarch of Chaeronea
* Plutocracy
* Pneuma
* Pneuma (Stoic)
* Poale Zion
* Poetics (Aristotle)
* Poetry
* Poiesis
* Poisoning the well
* Polarity
* Polarized pluralism
* Polemarchus
* Polemic (magazine)
* Polemon (scholarch)
* Polemon of Athens
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* Policraticus
* Polish logic
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* Politics
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* Politics and Vision: Continuity and Innovation in Western Political Thought
* Politics Drawn from the Very Words of Holy Scripture
* Polity (Aristotle)
* Pollyanna principle
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* Polyaenus of Lampsacus
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* Polysemy
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* Polysyllogism
* Pons asinorum
* Pontus Wikner
* Pooh and the Philosophers
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* Popper's experiment
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* Popular errors
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* Population
* Population ethics
* Populism
* Pornography
* Porphyrian tree
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* Pour soi
* Poverty of the stimulus
* Power (philosophy)
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* Prabhākara
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* Practical reason
* Practical reasoning
* Practical syllogism
* Practice in Christianity
* Praepositinus
* Prafulla Kumar Sen
* Pragma-dialectics
* Pragmatic contradiction
* Pragmatic mapping
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* Pragmaticism
* Pragmatics
* Pragmatism
* Praise
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* Predrag Vranicki
* Preestablished harmony
* Preexistence
* Preface paradox
* Prefaces
* Preference
* Preference utilitarianism
* Prefigurative politics
* Prefix grammar
* Preformation theory
* Preformationism
* Prehension
* Preintuitionism
* Prejudice
* Premise
* Prenex normal form
* Prescriptivism
* Prescriptivity
* Present
* Presentationism
* Presentism (historical analysis)
* Presocratic philosophy
* Presupposition
* Presupposition (philosophy)
* Preventable medical error
* Prevention of Disasters Principle
* Prevention paradox
* Price discrimination
* Prices of production
* Pride
* Prima facie
* Prima facie duties
* Prima facie duty
* Prima facie right
* Primary and secondary qualities
* Primary qualities
* Primary substance
* Primary/secondary quality distinction
* Primitivism
* Primum movens
* Primum non nocere
* Prince Shōtoku
* Principia Ethica
* Principia Mathematica
* Principium individuationis
* Principle
* Principle of bivalence
* Principle of charity
* Principle of compositionality
* Principle of comprehension
* Principle of contradiction
* Principle of double effect
* Principle of excluded middle
* Principle of explosion
* Principle of Generic Consistency
* Principle of humanity
* Principle of identity
* Principle of indifference
* Principle of individuation
* Principle of insufficient reason
* Principle of law
* Principle of non-contradiction
* Principle of nonvacuous contrast
* Principle of parsimony
* Principle of rationality
* Principle of subsidiarity
* Principle of sufficient reason
* Principle of uncertainty
* Principles
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* Principlism
* Prior Analytics
* Prior probability
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* Prisoner's dilemma
* Privacy
* Private language
* Private language argument
* Private language problem
* Private law
* Private sphere
* Privation
* Privatism
* Privilege (legal ethics)
* Privileged access
* Priya Reddy
* Pro-aging trance
* Pro hominem
* Proactionary principle
* Probabilism
* Probabilistic automaton
* Probabilistic causation
* Probabilistic independence
* Probability
* Probability calculus
* Probability interpretations
* Probability theory
* Problem
* Problem-based learning
* Problem of evil
* Problem of evil in Hinduism
* Problem of future contingents
* Problem of Hell
* Problem of induction
* Problem of love
* Problem of mental causation
* Problem of multiple generality
* Problem of other minds
* Problem of the criterion
* Problem of universals
* Problematization
* Problems (Aristotle)
* Problems of Peace and Socialism
* Procedural democracy
* Procedural knowledge
* Proceedings of the American Philosophical Society
* Process (philosophy)
* Process and Reality
* Process art
* Process of elimination
* Process philosophy
* Process theism
* Process theology
* Proclus
* Proclus Mallotes
* Procreative beneficence
* Prodicus
* Product term
* Production theory
* Productive forces
* Profane Existence
* Professional courtesy
* Professional ethics
* Professional responsibility
* Professor of Moral Philosophy, Glasgow
* Profiat Duran
* Programming language
* Progress (history)
* Progression of Animals
* Progressivism in the United States
* Prohairesis
* Projectivism
* Prolegomena to Any Future Metaphysics
* Prolepsis
* Proletarian internationalism
* Proletarianization
* Proletariat
* Proletkult
* Promise
* Proof-theoretic semantics
* Proof by assertion
* Proof by contradiction
* Proof by example
* Proof by exhaustion
* Proof by intimidation
* Proof net
* Proof theory
* Proofs and Refutations
* Proofs of eternity
* Propaganda
* Propaganda of the deed
* Propensity
* Propensity probability
* Proper class
* Proper name (philosophy)
* Proper names
* Propertarianism
* Properties
* Property
* Property (philosophy)
* Property dualism
* Property is theft!
* Prophecy
* Proportional reasoning
* Proportionalism
* Proportionality (law)
* Proposition
* Proposition (philosophy)
* Propositional attitude
* Propositional attitudes
* Propositional function
* Propositional knowledge
* Propositional logic
* Propositional operator
* Propositional representation
* Proprietism
* Proprioception
* Proprium
* Prosecutor's fallacy
* Proslogion
* Prosyllogism
* Protagoras
* Protagoras (dialogue)
* Protasis
* Protected values
* Protestant ethic
* Protestant work ethic
* Protests in Washington, D.C. against the International Monetary Fund and the World Bank
* Prototype theory
* Protrepsis and paraenesis
* Provability logic
* Provo (movement)
* Proxenus of Atarneus
* Proximate and ultimate causation
* Prudence
* Prudentialism
* Pseudo-Aristotle
* Pseudo-Demikristo
* Pseudo-Dionysius
* Pseudo-Dionysius the Areopagite
* Pseudo-philosophy
* Pseudo-Plutarch
* Pseudo-science
* Pseudo-secularism
* Pseudo atheism
* Pseudocertainty effect
* Pseudohallucination
* Pseudomathematics
* Pseudophilosophy
* Pseudorandomness
* Pseudoreligion
* Pseudoscience
* Psyche (psychology)
* Psychedelia
* Psychical distance
* Psychical Nomadism
* Psychoanalysis
* Psychoanalysis and Religion
* Psycholinguistics
* Psychological behaviorism
* Psychological egoism
* Psychological hedonism
* Psychological nominalism
* Psychological pain
* Psychological pricing
* Psychological projection
* Psychologism
* Psychologist's fallacy
* Psychology of art
* Psychology of reasoning
* Psychology, Philosophy and Physiology
* Psychophysical parallelism
* Psychophysics
* Ptolemy
* Ptolemy-el-Garib
* Public Administration
* Public good
* Public interest
* Public morality
* Public order crime
* Public reason
* Public sector ethics
* Public sphere
* Public trust
* Publication bias
* Publication history of The Ego and Its Own
* Publius Clodius Thrasea Paetus
* Publius Egnatius Celer
* Puddle thinking
* Pumping lemma for context-free languages
* Punctuality
* Punishment
* Punk ideologies
* Punk visual art
* Pure practical reason
* Pure reason
* Pure thought
* Purgatory
* Purity of arms
* Purpose of government
* Purposive theory
* Purva Mimamsa
* Purva Mimamsa Sutras
* Pygmalion effect
* Pyotr Chaadayev
* Pyotr Novikov
* Pyrrho
* Pyrrho of Elis
* Pyrrhonian skepticism
* Pyrrhonism
* Pythagoras
* Pythagoreanism
* Python of Aenus

## Q

* Q.E.D.
* Qazi Sa’id Qumi
* Qi
* Qian Dehong
* Qigong
* Qin Hui (historian)
* Qingjing Jing
* Qotb al-Din Shirazi
* Qualia
* Qualification problem
* Qualisign
* Qualitative identity
* Quality-adjusted life year
* Quality (philosophy)
* Quality of life
* Quantification
* Quantifier
* Quantifier elimination
* Quantifier shift
* Quantifier shift fallacy
* Quantity
* Quantum field theory
* Quantum indeterminacy
* Quantum logic
* Quantum measurement problem
* Quantum mechanics
* Quantum mind
* Quantum mysticism
* Quasi-empirical method
* Quasi-empiricism
* Quasi-empiricism in mathematics
* Quasi-quotation
* Quasi-realism
* Quassim Cassam
* Quaternio terminorum
* Queer heterosexuality
* Queer pedagogy
* Queer theory
* Quentin Meillassoux
* Quentin Smith
* QUEST: An African Journal of Philosophy
* Question
* Questionable cause
* Quiddity
* Quietism
* Quietism (Christian philosophy)
* Quine's paradox
* Quine–McCluskey algorithm
* Quinque viae
* Quinque voces
* Quintus Lucilius Balbus
* Quintus Septimus Florens Tertullian
* Quintus Sextius
* Quis custodiet ipsos custodes?
* Quotation