The following are given passages.
Passage 1:
Buddhist atomism
Buddhist atomism is a school of atomistic Buddhist philosophy that flourished on the Indian subcontinent during two major periods. During the first phase, which began to develop prior to the 6th century CE, Buddhist atomism had a very qualitative, Aristotelian-style atomic theory. This form of atomism identifies four kinds of atoms, corresponding to the standard elements. Each of these elements has a specific property, such as solidity or motion, and performs a specific function in mixtures, such as providing support or causing growth.  Like the Hindus and Jains, the Buddhists were able to integrate a theory of atomism with their logical presuppositions. 

According to Noa Ronkin, this kind of atomism was developed in the Sarvastivada and Sautrantika schools for whom material reality can be: reduced to discrete momentary atoms, namely, the four primary elements. These momentary atoms, through their spatial arrangement and by their concatenation with prior and posterior atoms of the same type, create the illusion of persisting things as they appear in our everyday experience. Atomic reality is thus understood first and foremost as change, though not in the sense of a thing x transforming into y. That is, change itself is the very nature of atomic reality rather than its being made of enduring substances the qualities of which undergo change. Atoms that appear to endure are, in fact, a series of momentary events that ascend and fall in rapid succession and in accordance with causal relations. Unlike the atoms of the Vaifesika, the atoms of the Sarvastivada-Vaibhasika and the Sautrantika are not permanent: they come into being and cease from one moment to the next going through a process of birth, continuance, decay and destruction. Yet the material compounds that consist of these atoms are real, if only in the minimal, phenomenological sense.The second phase of Buddhist atomism, which flourished in the 7th century CE, was very different from the first. Indian Buddhist philosophers, including Dharmakirti and Dignāga, considered atoms to be point-sized, durationless, and made of energy. In discussing Buddhist atomism, Stcherbatsky writes:
... The Buddhists denied the existence of substantial matter altogether. Movement consists for them of moments, it is a staccato movement, momentary flashes of a stream of energy... "Everything is evanescent," ... says the Buddhist, because there is no stuff ... Both systems [Sānkhya and later Indian Buddhism] share in common a tendency to push the analysis of Existence up to its minutest, last elements which are imagined as absolute qualities, or things possessing only one unique quality. They are called "qualities" (guna-dharma) in both systems in the sense of absolute qualities, a kind of atomic, or intra-atomic, energies of which the empirical things are composed. Both systems, therefore, agree in denying the objective reality of the categories of Substance and Quality, ... and of the relation of Inference uniting them. There is in Sānkhya philosophy no separate existence of qualities. What we call quality is but a particular manifestation of a subtle entity. To every new unit of quality corresponds a subtle quantum of matter which is called guna "quality", but represents a subtle substantive entity. The same applies to early Buddhism where all qualities are substantive ... or, more precisely, dynamic entities, although they are also called dharmas ("qualities").

See also
Atomism
Dharmakirti
Dignaga
Kalapas
Mereological nihilism

Notes
Passage 2:
Leucippus
Leucippus (; Greek: Λεύκιππος, Leúkippos; fl. 5th century BCE) was a pre-Socratic Greek philosopher who has been credited as the first philosopher to develop a theory of atomism.
Leucippus' reputation, even in antiquity, was obscured by the reputation of his much more famous pupil, Democritus, who is also credited with the first development of atomic theory. Few details about Leucippus' life are known, and even his historical existence has on occasion been questioned.

Biography
Leucippus's dates are not recorded and he is often mentioned in conjunction with his more well-known pupil Democritus. Diogenes Laertius lists possible birthplaces as Miletus, Abdera and Elea. Some sources claim that around 440 or 430 BCE Leucippus founded a school at Abdera, with which his pupil, Democritus, was closely associated. There is mention that a Leucippus founded the city of Metapontum, which honored this Leucippus with a coin.

Philosophical views
"Nothing happens at random, but everything from reason and by necessity."
Leucippus is typically associated with atomism—the idea that the only two things are atoms, which are imperishable, indivisible elements that compose everything, and void, which is the space that atoms do occupy or can occupy. It is difficult to determine which contributions to atomism come from Democritus and which come from Leucippus. Aristotle and his student Theophrastus explicitly credit Leucippus with the invention of atomism. In Aristotelian terms, Leucippus agreed with the Eleatic argument that "true being does not admit of vacuum" and there can be no movement in the absence of vacuum. Leucippus contended that since movement exists, there must be empty space. However, he concludes that vacuum is identified with nonbeing, since "nothing" cannot really be. According to Aristotle, Leucippus differed from the Eleatics in not being encumbered by the "conceptual intermingling" of being and non-being, and Plato made the necessary distinction between "grades of being and types of negation".

Writings
According to Theophrastus, Leucippus was the author of a work called The Great World System that was otherwise typically attributed to Democritus, which has not survived. A single quotation survives from another work attributed to him called On Mind.

Legacy
A brief notice in Diogenes Laërtius's life of Epicurus says that on the testimony of Epicurus, Leucippus never existed. As the philosophical heir of Democritus, Epicurus's word has some weight, and indeed a controversy over this matter raged in German scholarship for many years at the close of the 19th century. Furthermore, in his Corpus Democriteum, Thrasyllus of Alexandria, an astrologer and writer living under the emperor Tiberius (14–37 CE), compiled a list of writings on atomism that he attributed to Democritus to the exclusion of Leucippus. The present consensus among the world's historians of philosophy is that this Leucippus is historical. Moreover, it is not clear how to interpret Epicurus' comment in the first place. Epicurus said that there was no philosopher Leucippus, which might mean that Leucippus never existed, but it also might mean that Leucippus existed but was not a philosopher. As far as ancient evidence of his existence is concerned, it must be mentioned that Aristotle, who lived closer in time to Leucippus than Epicurus, attributes to Leucippus the framework of atomism as a philosophical system, lending more credibility to the thesis that Leucippus existed.
Fragments and doxographical reports about Leucippus were collected by Hermann Diels (1848–1922), firstly in Doxographi Graeci (Berlin, 1879, reprint Berlin: de Gruyter, 1929) and then in Die Fragmente der Vorsokratiker, Berlin, 1903, 6th ed., rev. by Walther Kranz (Berlin: Weidmann, 1952; the editions after the 6th are mainly reprints with little or no change.) Diels was the leading proponent for a historical Leucippus.

See also
Indeterminism
Kanada

Notes
Bibliography
Surviving Fragments and Testimonia
In the Diels-Kranz numbering system for fragments of the pre-Socratic philosophers, Leucippus is number 67. The following works contain Diels-Kranz fragments.
 Laërtius, Diogenes (1925). "Others: Leucippus" . Lives of the Eminent Philosophers. Vol. 2:9. Translated by Hicks, Robert Drew (Two volume ed.). Loeb Classical Library. § 30-33. - A1
 Laërtius, Diogenes (1925). "Epicurus" . Lives of the Eminent Philosophers. Vol. 2:10. Translated by Hicks, Robert Drew (Two volume ed.). Loeb Classical Library. § 13. - A2
Simplicius, Commentary on Aristotle's Physics - A3, A8, A13-14,20
Clement of Alexandria, Stromata - A4, A37
Pseudo-Galen, History of philosophy - A5
Aristotle, Metaphysics - A6, A18
Aristotle, On Generation and Corruption -A7, A9
Aristotle, On The Heavens - A19
Aristotle, On the Soul - A28
Hippolytus, Refutation of all Heresies A10
Cicero, Academica - A11
Stobaeus, Anthologium - A12, A15, A16, A21, A22, A23, A24, A25, A26, A29, A30, A31, A32, A34, A35, A36, B2
Epiphanius - A33
Achilles Tatius - B1These fragments are collected together in:

Hermann Diels; Walther Kranz (1963). Die Fragmente der Vorsokratiker (in Ancient Greek). Vol. 2. Hildesheim Weidmann. ISBN 978-3-615-12200-8. Retrieved 8 April 2022.
Passage 3:
Atomism (social)
Atomism or social atomism is a sociological theory arising from the scientific notion atomic theory, coined by the ancient Greek philosopher Democritus and the Roman philosopher Lucretius. In the scientific rendering of the word, atomism refers to the notion that all matter in the universe is composed of basic indivisible components, or atoms. When placed into the field of sociology, atomism assigns the individual as the basic unit of analysis for all implications of social life. This theory refers to "the tendency for society to be made up of a collection of self-interested and largely self-sufficient individuals, operating as separate atoms." Therefore, all social values, institutions, developments and procedures evolve entirely out of the interests and actions of the individuals who inhabit any particular society. The individual is the "atom" of society and therefore the only true object of concern and analysis.

Political implications
Political theorists such as John Locke and Thomas Hobbes extend social atomism to the political realm. They assert that human beings are fundamentally self-interested, equal, and rational social atoms that together form an aggregate society of self-interested individuals. Those participating in society must sacrifice a portion of their individual rights in order to form a social contract with the other persons in society. Ultimately, although some rights are renounced, self-interested cooperation occurs for the mutual preservation of the individuals and for society at large.
According to the philosopher Charles Taylor, The term "atomism" is used loosely to characterize the doctrines of social contract theory which arose in the seventeenth century and also successor doctrines which may not have made use of the concept of social contract but which inherited a vision of society as in some sense constituted by individuals for the fulfilment of ends which were primarily individual. Certain forms of utilitarianism are successor doctrines in this sense. The term is also applied to contemporary doctrines which hark back to social contract theory, or which try to defend in some sense the priority of the individual and his rights over society, or which present a purely instrumental view of society.

Critiques
Those who criticize the theory of social atomism believe that it neglects the idea of the individual as unique. The sociologist Elizabeth Wolgast asserts that, From the atomistic standpoint, the individuals who make up a society are interchangeable like molecules in a bucket of water – society a mere aggregate of individuals. This introduces a harsh and brutal equality into our theory of human life and it contradicts our experience of human beings as unique and irreplaceable, valuable in virtue of their variety – in what they don't share – not in virtue of their common ability to reason. Those who question social atomism argue that it is unjust to treat all persons equally when individual necessities and circumstances are clearly dissimilar.

See also
Anomie
Differentiation (sociology)
Holism
Id, ego and super-ego § Ego
Independence
Individualism
Social alienation
Social integration
Socialization
Passage 4:
Pluralist school
Pre-Socratic philosophy, also known as Early Greek Philosophy, is ancient Greek philosophy before Socrates. Pre-Socratic philosophers were mostly interested in cosmology, the beginning and the substance of the universe, but the inquiries of these early philosophers spanned the workings of the natural world as well as human society, ethics, and religion. They sought explanations based on natural law rather than the actions of gods. Their work and writing has been almost entirely lost. Knowledge of their views comes from testimonia, i.e. later authors' discussions of the work of pre-Socratics. Philosophy found fertile ground in the ancient Greek world because of the close ties with neighboring civilizations and the rise of autonomous civil entities, poleis.
Pre-Socratic philosophy began in the 6th century BCE with the three Milesians: Thales, Anaximander, and Anaximenes. They all attributed the arche (a word that could take the meaning of "origin," "substance" or "principle") of the world to, respectively, water, apeiron (the unlimited), and air. Another three pre-Socratic philosophers came from nearby Ionian towns: Xenophanes, Heraclitus, and Pythagoras. Xenophanes is known for his critique of the anthropomorphism of gods. Heraclitus, who was notoriously difficult to understand, is known for his maxim on impermanence, ta panta rhei, and for attributing fire to be the arche of the world. Pythagoras created a cult-like following that advocated that the universe was made up of numbers. The Eleatic school (Parmenides, Zeno of Elea, and Melissus) followed in the 5th century BCE. Parmenides claimed that only one thing exists and nothing can change. Zeno and Melissus mainly defended Parmenides' opinion. Anaxagoras and Empedocles offered a pluralistic account of how the universe was created. Leucippus and Democritus are known for their atomism, and their views that only void and matter exist. The Sophists advanced philosophical relativism.
The impact of the pre-Socratics has been enormous. The pre-Socratics invented some of the central concepts of Western civilization, such as naturalism and rationalism, and paved the way for scientific methodology.

Terminology
Pre-Socratic is a term adopted in the 19th century to refer to this group of philosophers. It was first used by the German philosopher J.A. Eberhard as "vorsokratische Philosophie' in the late 18th century. In earlier literature they were referred to as physikoi ("physicists", after physis, "nature"), and their activity, as physiologoi (physical or natural philosophers), with this usage arising with Aristotle to differentiate them from theologoi (theologians) and mythologoi (storytellers and bards who conveyed Greek mythology), who attributed natural phenomena to the gods.The term was coined to highlight a fundamental change in philosophical inquiries between the philosophers who lived before Socrates, who were interested in the structure of nature and cosmos (i.e., the universe, with the implication that the universe had order to it), and Socrates and his successors, who were mostly interested in ethics and politics. The term comes with drawbacks, as several of the pre-Socratics were highly interested in ethics and how to live the best life. Further, the term implies that the pre-Socratics are less significant than Socrates, or even that they were merely a stage (implying teleology) to classical era philosophy. The term is also chronologically inaccurate, as the last of the pre-Socratics were contemporaries of Socrates.According to James Warren, the distinction between the pre-Socratic philosophers and philosophers of the classical era is demarcated not so much by Socrates, but by geography and what texts survived. The shift from the pre-Socratic to the classical periods involves a shift from philosophers being dispersed throughout the Greek-speaking world to their being concentrated in Athens. Further, starting in the classical period we have complete surviving texts, whereas in the pre-Socratic era we have only fragments. Scholar André Laks distinguishes two traditions of separating pre-Socratics from Socratics, dating back to the classical era and running through current times. The first tradition is the Socratic-Ciceronian, which uses the content of their philosophical inquires to divide the two groups: the pre-Socratics were interested in nature whereas Socrates focused on human affairs. The other tradition, the Platonic-Aristotelian, emphasizes method as the distinction between the two groups, as Socrates moved to a more epistemological approach of studying various concepts. Because of the drawbacks of the term pre-Socratic, Early Greek Philosophy is also used, most commonly in Anglo-Saxon literature.André Laks and Glenn W. Most have especially popularized this shift in describing the era as "Early Greek Philosophy" over "Pre-Socratic Philosophy" through their comprehensive, nine volume Loeb editions of Early Greek Philosophy. In their first volume, they distinguish their systematic approach from that of Hermann Diels, beginning with the choice of "Early Greek Philosophy" over "pre-Socratic philosophy" most notably because Socrates is contemporary and sometimes even prior to philosophers traditionally considered "pre-Socratic" (e.g., the Atomists).

Sources
Very few fragments of the works of the pre-Socratic philosophers have survived. The knowledge we have of the pre-Socratics derives from the accounts of later writers such as Plato, Aristotle, Plutarch, Diogenes Laërtius, Stobaeus, and Simplicius, and some early Christian theologians, especially Clement of Alexandria and Hippolytus of Rome. Many of the works are titled Peri Physeos, or On Nature, a title probably attributed later by other authors. These accounts, known as testimonia (testimonies), often come from biased writers. Consequently, it is sometimes difficult to determine the actual line of argument some pre-Socratics used in supporting their views. Adding more difficulty to their interpretation is the obscure language they used. Plato paraphrased the pre-Socratics and showed no interest in accurately representing their views. Aristotle was more accurate, but saw them under the scope of his philosophy. Theophrastus, Aristotle's successor, wrote an encyclopedic book Opinion of the Physicists that was the standard work about the pre-Socratics in ancient times. It is now lost, but Simplicius relied on it heavily in his accounts.In 1903, the German professors H. Diels and W. Kranz published Die Fragmente der Vorsokratiker (The Fragments of the pre-Socratics), which collected all of the known fragments. Scholars now use this book to reference the fragments using a coding scheme called Diels–Kranz numbering. The first two characters of the scheme are "DK" for Diels and Kranz. Next is a number representing a specific philosopher. After that is a code regarding whether the fragment is a testimonia, coded as "A", or "B" if is a direct quote from the philosopher. Last is a number assigned to the fragment, which may include a decimal to reflect specific lines of a fragment. For example, "DK59B12.3" identifies line 3 of Anaxagoras fragment 12. A similar way of referring to quotes is the system prefixed with "LM" by André Laks and Glenn W. Most who edited Early Greek Philosophy in 2016.Collectively, these fragments are called doxography (derived from the latin doxographus; derived from the Greek word for "opinion" doxa).

Historical background
Philosophy emerged in ancient Greece in the 6th century BCE. The pre-Socratic era lasted about two centuries, during which the expanding Persian Achaemenid Empire was stretching to the west, while the Greeks were advancing in trade and sea routes, reaching Cyprus and Syria. The first pre-Socratics lived in Ionia, on the western coast of Anatolia. Persians conquered the towns of Ionia c. 540 BCE and Persian tyrants then ruled them. The Greeks revolted in 499 BCE, but ultimately were defeated in 494 BCE. Slowly but steadily Athens became the philosophical center of Greece by the middle of the fifth century. Athens was entering its Classical Era, with philosophers such as Socrates, Plato, and Aristotle, but the impact of the pre-Socratics continued.Several factors contributed to the birth of pre-Socratic philosophy in Ancient Greece. Ionian towns, especially Miletus, had close trade relations with Egypt and Mesopotamia, cultures with observations about the natural world that differed from those of the Greeks. Apart from technical skills and cultural influences, of paramount significance was that the Greeks acquired the alphabet c. 800 BCE.Another factor was the ease and frequency of intra-Greek travel, which led to the blending and comparison of ideas. During the sixth century BCE, various philosophers and other thinkers moved easily around Greece, especially visiting pan-Hellenic festivals. While long-distance communication was difficult during ancient times, persons, philosophers, and books moved through other parts of the Greek peninsula, the Aegean islands, and Magna Graecia, a coastal area in Southern Italy.The democratic political system of independent poleis also contributed to the rise of philosophy. Most Greek towns were not ruled by autocrats or priests, allowing citizens to question freely a wide range of issues. Various poleis flourished and became wealthy, especially Miletus. which was a centre of trade and production during the early phases of pre-Socratic philosophy. Trade of grain, oil, wine, and other commodities among each polis and colonies meant these towns were not isolated but embedded – and economically dependent – on a complex and changeable web of trade routes.Greek mythology also influenced the birth of philosophy. The philosophers' ideas, were, to a certain extent, answers to questions that were subtly present in the work of Homer and Hesiod. The pre-Socratics arose from a world dominated by myths, sacred places, and local deities. The work of epic poets such as Homer, Hesiod and others reflected this environment. They are considered predecessors of the pre-Socratics since they seek to address the origin of the world and to organize traditional folklore and legends systematically. Greek popular religion contained many features of the religions of neighboring civilizations, such as the Egyptians, Mesopotamians, and Hittites. The first pre-Socratic philosophers also traveled extensively to other lands, meaning that pre-Socratic thought had roots abroad as well as domestically.Homer, in his two epic poems, not only personifies gods and other natural phenomena, such as the Night, but he hints at some views on the origin and the nature of the world that came under scrutiny by the pre-Socratics. In his epic poem Theogony (literally meaning the birth of gods) Hesiod (c. 700 BCE) describes the origin of gods, and apart from the solid mythical structure, one can notice an attempt towards organizing beliefs using some form of rationalization; an example would be that Night gives birth to Death, Sleep and Dreams.  Transmigration of life, a belief of the Orphics, a religious cult originating from Thrace, had affected the thought of the 5th century BCE but the overall influence of their cosmology on philosophy is disputed. Pherecydes, a poet, magician, and contemporary of Thales, in his book describes a particular cosmogony, asserting that three gods pre-existed – a step towards rationality.

General features
The most important feature of pre-Socratic philosophy was the use of reason to explain the universe. The pre-Socratic philosophers shared the intuition that there was a single explanation that could explain both the plurality and the singularity of the whole – and that explanation would not be direct actions of the gods. The pre-Socratic philosophers rejected traditional mythological explanations of the phenomena they saw around them in favor of more rational explanations, initiating analytic and critical thought. Their efforts were directed at the investigation of the ultimate basis and essential nature of the external world. Many sought the material principle (arche) of things, and the method of their origin and disappearance. They emphasized the rational unity of things and rejected supernatural explanations, seeking natural principles at work in the world and human society. The pre-Socratics saw the world as a cosmos, an ordered arrangement that could be understood via rational inquiry. In their effort to make sense of the cosmos they coined new terms and concepts such as rhythm, symmetry, analogy, deductionism, reductionism, mathematization of nature and others.An important term that is met in the thought of several pre-Socratic philosophers is arche. Depending on the context, it can take various related meanings. It could mean the beginning or origin with the undertone that there is an effect on the things to follow. Also, it might mean a principle or a cause (especially in Aristotelian tradition).A common feature of the pre-Socratics is the absence of empiricism and experimentation in order to prove their theories. This may have been because of a lack of instruments, or because of a tendency to view the world as a unity, undeconstructable, so it would be impossible for an external eye to observe tiny fractions of nature under experimental control.According to Jonathan Barnes, a professor of ancient philosophy, pre-Socratic philosophy exhibits three significant features: they were internal, systematic and economical. Internal meaning they tried to explain the world with characteristics found within this world. Systematic because they tried to universalize their findings. Economical because they tried to invoke only a few new terms. Based on these features, they reached their most significant achievement, they changed the course of human thought from myth to philosophy and science.The pre-Socratics were not atheists; however, they minimized the extent of the gods' involvement in natural phenomena such as thunder or totally eliminated the gods from the natural world.Pre-Socratic philosophy encompasses the first of the three phases of ancient Greek philosophy, which spanned around a thousand years. The pre-Socratic phase itself is divided into three phases. The first phase of pre-Socratic philosophy, mainly the Milesians, Xenophanes, and Heraclitus, consisted of rejecting traditional cosmogony and attempting to explain nature based on empirical observations and interpretations. A second phase – that of the Eleatics – resisted the idea that change or motion can happen. Based on their radical monism, they believed that only one substance exists and forms Kosmos. The Eleatics were also monists (believing that only one thing exists and everything else is just a transformation of it).  In the third phase, the post-Eleatics (mainly Empedocles, Anaxagoras, and Democritus) opposed most Eleatic teaching and returned to the naturalism of the Milesians.The pre-Socratics were succeeded by the second phase of ancient philosophy, where the philosophical movements of Platonism, Cynicism, Cyrenaicism, Aristotelianism, Pyrrhonism, Epicureanism, Academic skepticism, and Stoicism rose to prominence until 100 BCE. In the third phase, philosophers studied their predecessors.

Pre-Socratic philosophers
Milesian beginning: Thales, Anaximander and Anaximenes
The Milesian school was located in Miletus, Ionia, in the 6th century BCE.  It consisted of Thales, Anaximander, and Anaximenes, who most probably had a teacher-pupil relationship. They were mainly occupied with the origin and substance of the world; each of them attributed the Whole to a single arche (beginning or principle), starting the tradition of naturalistic monism.

Thales
Thales (c. 624–546 BCE) is considered to be the father of philosophy. None of his writings have survived. He is considered the first western philosopher since he was the first to use reason, to use proof, and to generalize. He created the word cosmos, the first word to describe the universe. He contributed to geometry and predicted the eclipse of 585 BCE. Thales may have been of Phoenician ancestry. Miletus was a meeting point and trade centre of the then great civilizations, and Thales visited the neighbouring civilizations, Egypt, Mesopotamia, Crete, and Phoenicia.  In Egypt, geometry was advanced as a means of separating agricultural fields. Thales, though, advanced geometry with his abstract deductive reasoning reaching universal generalizations. Proclus, a later Athenian philosopher, attributed the theorem now known as Thales's theorem to Thales. He is also known for being the first to claim that the base angles of isosceles triangles are equal, and that a diameter bisects the circle. Thales visited Sardis, as many Greeks then, where astronomical records were kept and used astronomical observations for practical matters (oil harvesting). Thales was widely considered a genius in ancient times and was revered as one of the Seven Sages of Greece.Most importantly, what marks Thales as the first philosopher is the posing of the fundamental philosophical question about the origin and the substance of the world, while providing an answer based on empirical evidence and reasoning. He attributed the origin of the world to an element instead of a divine being. Our knowledge of Thales' claim derives from Aristotle. Aristotle, while discussing opinions of previous philosophers, tells us that "Thales, the founder of this type of philosophy, says the principle (arche) is water." What he meant by arche, is a matter of interpretation (might be the origin, the element, or an ontological matrix), but regardless of the various interpretations, he conceived the world as One thing instead of a collection of various items and speculated on the binding/original elements.Another important aspect of Thales' philosophy is his claim that everything is full of gods. What he meant by that is again a matter of interpretation, that could be from a theistic view to an atheist one. But the most plausible explanation, suggested by Aristotle, is that Thales is advocating a theory of hylozoism, that the universe, the sum of all things that exist, is divine and alive. Lastly, another notable claim by Thales is that earth "rests on water"- maybe that was a conclusion after observing fish fossils on land.

Anaximander
Anaximander (610–546 BCE), also from Miletus, was 25 years younger than Thales. He was a member of the elite of Miletus, wealthy and a statesman. He showed interest in many fields, including mathematics and geography. He drew the first map of the world, was the first to conclude that the earth is spherical, and made instruments to mark time, something like a clock. In response to Thales, he postulated as the first principle an undefined, unlimited substance without qualities (apeiron), out of which the primary opposites, hot and cold, moist and dry, became differentiated. His answer was an attempt to explain observable changes by attributing them to a single source that transforms to various elements. Like Thales, he provided a naturalistic explanation for phenomena previously given supernatural explanations. He is also known for speculating on the origin of mankind. He proclaimed that the earth is not situated in another structure but lies unsupported in the middle of the universe. Further, he developed a rudimentary evolutionary explanation for biodiversity in which constant universal powers affected the lives of animals. According to Giorgio de Santillana, a philosophy professor at the Massachusetts Institute of Technology, Anaximander's conception of a universe governed by laws shaped the philosophical thinking of centuries to come and was as important as the discovery of fire or Einstein's breakthroughs in science.

Anaximenes
Little is known of Anaximenes' (585–525 BCE) life. He was a younger contemporary and friend of Anaximander, and the two worked together on various intellectual projects. He also wrote a book on nature in prose. Anaximenes took for his principle aēr (air), conceiving it as being modified, via thickening and thinning, into the other classical elements: fire, wind, clouds, water, and earth. While his theory resembled that of Anaximander, as they both claimed a single source of the universe, Anaximenes suggested sophisticated mechanisms in which air is transformed to other elements, mainly because of changes of density. Since the classical era, he was considered the father of naturalistic explanations. Anaximenes expanded Anaximander's attempt to find a unitary cause explaining natural phenomena both living and nonliving, without, according to James Warren, having to "reduce living things in some way to mere locations of material change".

Xenophanes
Xenophanes was born in Colophon, an Ionian town near Miletus. He was a well-traveled poet whose primary interests were theology and epistemology. Concerning theology, he pointed out that we did not know whether there was one god or many gods, or in such case whether there was a hierarchy among them. To critique the anthropomorphic representation of the gods by his contemporary Greeks, he pointed out that different nations depicted their gods as looking like themselves. He famously said that if oxen, horses, or lions could draw, they would draw their gods as oxen, horses, or lions. This critique was not limited to the looks of gods but also their behaviour. Greek mythology, mostly shaped by the poets Homer and Hesiod, attributed moral failures such as jealously and adultery to the gods. Xenophanes opposed this. He thought gods must be morally superior to humans. Xenophanes, however, never claimed the gods were omnipotent, omnibenevolent, or omniscient. Xenophanes also offered naturalistic explanations for phenomena such as the sun, the rainbow and St. Elmo's fire. Traditionally these were attributed to divine intervention but according to Xenophanes they were actually effects of clouds. These explanations of Xenophanes indicate empiricism in his thought and might constitute a kind of proto-scientism. Scholars have overlooked his cosmology and naturalism since Aristotle (maybe due to Xenophanes' lack of teleology) until recently but current literature suggests otherwise. Concerning epistemology,  Xenophanes questioned the validity of human knowledge. Humans usually tend to assert their beliefs are real and represent truth. While Xenophanes was a pessimist about the capability of humans to reach knowledge, he also believed in gradual progress through critical thinking. Xenophanes tried to find naturalistic explanations for meteorological and cosmological phenomena.Ancient philosophy historian Alexander Mourelatos notes Xenophanes used a pattern of thought that is still in use by modern metaphysics. Xenophanes, by reducing meteorological phenomena to clouds, created an argument that "X in reality is Y", for example B32, "What they call Iris [the rainbow] that too is in reality a cloud: one that
appears to the eye as purple, red, and green. This is still use[d] today 'lightning is massive electrical discharge' or 'items such as tables are a cloud of micro-particles'." Mourelatos comments that the type of analogy that the cloud analogy is remains present in scientific language and "...is the modern philosopher's favourite subject for illustrations of inter-theoretic identity".According to Aristotle and Diogenes Laertius, Xenophanes was Parmenides' teacher; but is a matter of debate in current literature whether Xenophanes should also be considered an Eleatic.

Heraclitus
The hallmark of Heraclitus' philosophy is flux. In fragment DK B30, Heraclitus writes: This world-order [Kosmos], the same of all, no god nor man did create, but it ever was and is and will be: everliving fire, kindling in measures and being quenched in measures. Heraclitus posited that all things in nature are in a state of perpetual flux. Like previous monist philosophers, Heraclitus claimed that the arche of the world was fire, which was subject to change – that makes him a materialist monist. From fire all things originate and all things return to it again in a process of eternal cycles. Fire becomes water and earth and vice versa. These everlasting modifications explain his view that the cosmos was and is and will be. The idea of continual flux is also met in the "river fragments". There, Heraclitus claims we can not step into the same river twice, a position summarized with the slogan ta panta rhei (everything flows). One fragment reads: "Into the same rivers we both step and do not step; we both are and are not" (DK 22 B49a). Heraclitus is seemingly suggesting that not only the river is constantly changing, but we do as well, even hinting at existential questions about humankind.Another key concept of Heraclitus is that opposites somehow mirror each other, a doctrine called unity of opposites. Two fragments relating to this concept state, "As the same thing in us is living and dead, waking and sleeping, young and old. For these things having changed around are those, and those in turn having changed around are these" (B88) and "Cold things warm up, the hot cools off, wet becomes dry, dry becomes wet" (B126).  Heraclitus' doctrine on the unity of opposites suggests that unity of the world and its various parts is kept through the tension produced by the opposites. Furthermore, each polar substance contains its opposite, in a continual circular exchange and motion that results in the stability of the cosmos. Another of Heraclitus' famous axioms highlights this doctrine (B53): "War is father of all and king of all; and some he manifested as gods, some as men; some he made slaves, some free", where war means the creative tension that brings things into existence.A fundamental idea in Heraclitus is logos, an ancient Greek word with a variety of meanings; Heraclitus might have used a different meaning of the word with each usage in his book. Logos seems like a universal law that unites the cosmos, according to a fragment: "Listening not to me but to the logos, it is wise to agree (homologein) that all things are one" (DK 22 B50). While logos is everywhere, very few people are familiar with it. B 19 reads: [hoi polloi] "...do not know how to listen [to Logos] or how to speak [the truth]"  Heraclitus' thought on logos influenced the Stoics, who referred to him to support their belief that rational law governs the universe.

Pythagoreanism
Pythagoras (582–496 BCE) was born on Samos, a small island near Miletus. He moved to Croton at about age 30, where he established his school and acquired political influence. Some decades later he had to flee Croton and relocate to Metapontum.Pythagoras was famous for studying numbers and the geometrical relations of numbers. A large following of Pythagoreans adopted and extended his doctrine. They advanced his ideas, reaching the claim that everything consists of numbers, the universe is made by numbers and everything is a reflection of analogies and geometrical relations. Numbers, music and philosophy, all interlinked, could comfort the beauty-seeking human soul and hence Pythagoreans espoused the study of mathematics.Pythagorianism perceived the world as perfect harmony, dependent on number, and aimed at inducing humankind likewise to lead a harmonious life, including ritual and dietary recommendations. Their way of life was ascetic, restraining themselves from various pleasures and food. They were vegetarians and placed enormous value on friendship.  Pythagoras politically was an advocate of a form of aristocracy, a position which later Pythagoreans rejected, but generally, they were reactionary and notably repressed women. Other pre-Socratic philosophers mocked Pythagoras for his belief in reincarnation.Notable Pythagorians included Philolaus (470-380 BCE), Alcmaeon of Croton, Archytas (428-347 BCE) and Echphantus. The most notable was Alcmaeon, a medical and philosophical writer. Alcmaeon noticed that most organs in the body come in pairs and suggested that human health depends on harmony between opposites (hot/cold, dry/wet), and illness is due to an imbalance of them. He was the first to think of the brain as the center of senses and thinking. Philolaus advanced cosmology through his discovery of heliocentricism – the idea that the Sun lies in the middle of the earth's orbit and other planets.Pythagoreanism influenced later Christian currents as Neoplatonism, and its pedagogical methods were adapted by Plato. Furthermore, there seems to be a continuity in some aspects of Plato's philosophy. As Prof. Carl Huffman notes, Plato had a tendency to invoke mathematics in explaining natural phenomena, and he also believed in the immortality, even divinity of the human soul.

The Eleatics: Parmenides, Zeno and Melissus
The Eleatic school is named after Elea, an ancient Greek town on the southern Italian Peninsula. Parmenides is considered the founder of the school. Other eminent Eleatics include Zeno of Elea and Melissus of Samos. According to Aristotle and Diogenes Laertius, Xenophanes was Parmenides' teacher, and it is debated whether Xenophanes should also be considered an Eleatic.  Parmenides was born in Elea to a wealthy family around 515 BCE. Parmenides of Elea was interested in many fields, such as biology and astronomy. He was the first to deduce that the earth is spherical. He was also involved in his town's political life.

Parmenides' contributions were paramount not only to ancient philosophy but to all of western metaphysics and ontology. Parmenides wrote a hard to interpret poem, named On Nature or On What-is, that substantially influenced later Greek philosophy. Only 150 fragments of this poem survive. It tells a story of a young man (kouros in ancient Greek) dedicated to finding the truth carried by a goddess on a long journey to the heavens. The poem consists of three parts, the proem (i.e., preface), the Way of Truth and the Way of Opinion.  Very few pieces from the Way of Opinion survive. In that part, Parmenides must have been dealing with cosmology, judging from other authors' references. The Way of Truth was then, and is still today, considered of much more importance. In the Way of Truth, the goddess criticizes the logic of people who do not distinguish the real from the non-existent ("What-is" and "What-is-Not"). In this poem Parmenides unfolds his philosophy: that all things are One, and therefore nothing can be changed or altered. Hence, all the things that we think to be true, even ourselves, are false representations. What-is, according to Parmenides, is a physical sphere that is unborn, unchanged, and infinite. This is a monist vision of the world, far more radical than that of Heraclitus. The goddess teaches Kouros to use his reasoning to understand whether various claims are true or false, discarding senses as fallacious. Other fundamental issues raised by Parmenides' poem are the doctrine that nothing comes from nothing and the unity of being and thinking. As quoted by DK fragment 3: To gar auto noein estin te kai einai (For to think and to be is one and the same).Zeno and Melissus continued Parmenides' thought on cosmology. Zeno is mostly known for his paradoxes, i.e., self-contradictory statements which served as proofs that Parmenides' monism was valid, and that pluralism was invalid. The most common theme of those paradoxes involved traveling a distance, but since that distance comprises infinite points, the traveler could never accomplish it. His most famous is the Achilles paradox, which is mentioned by Aristotelis: "The second is called the 'Achilles' and says that the slowest runner will never be caught by the fastest, because it is necessary for the pursuer first to arrive at the point from which the pursued set off, so it is necessary that the slower will always be a little ahead." (Aristotle Phys. 239b14–18 [DK 29 A26]) Melissus defended and advanced Parmenides' theory using prose, without invoking divinity or mythical figures. He tried to explain why we think various non-existent objects exist.The Eleatics' focus on Being through means of logic initiated the philosophical discipline of ontology. Other philosophers influenced by the Eleatics (such as the Sophists, Plato, and Aristotle) further advanced logic, argumentation, mathematics and especially elenchos (proof). The Sophists even placed Being under the scrutiny of elenchos. Because of the Eleatics reasoning was acquiring a formal method.

The Pluralists: Anaxagoras and Empedocles
The Pluralist school marked a return to Milesian natural philosophy, though much more refined because of Eleatic criticism.Anaxagoras was born in Ionia, but was the first major philosopher to emigrate to Athens. He was soon associated with the Athenian statesman Pericles and, probably due to this association, was accused by a political opponent of Pericles for impiety as Anaxagoras held that the sun was not associated with divinity; it was merely a huge burning stone. Pericles helped Anaxagoras flee Athens and return to Ionia. Anaxagoras was also a major influence on Socrates.Anaxagoras is known for his "theory of everything". He claimed that "in everything there is a share of everything." Interpretations differ as to what he meant. Anaxagoras was trying to stay true to the Eleatic principle of the everlasting (What-is) while also explaining the diversity of the natural world. Anaxagoras accepted Parmenides' doctrine that everything that exists (What-is) has existed forever, but contrary to the Eleatics, he added the ideas of panspermia and nous. All objects were mixtures of various elements, such as air, water, and others. One special element was nous, i.e., mind, which is present in living things and causes motion. According to Anaxagoras, Nous was one of the elements that make up the cosmos. Things that had nous were alive.  According to Anaxagoras, all things are composites of some basic elements; although it is not clear what these elements are. All objects are a mixture of these building blocks and have a portion of each element,  except nous. Nous was also considered a building block of the cosmos, but it exists only in living objects. Anaxagoras writes: "In everything there is a portion (moira) of everything except mind (nous), but there are some things in which mind too is present." Nous was not just an element of things, somehow it was the cause of setting the universe into motion.  Anaxagoras advanced Milesian thought on epistemology, striving to establish an explanation that could be valid for all natural phenomena. Influenced by the Eleatics, he also furthered the exploration of metatheoretical questions such as the nature of knowledge.Empedocles was born in Akragas, a town in the southern Italian peninsula. According to Diogenes Laertius, Empedocles wrote two books in the form of poems: Peri Physeos (On nature) and the Katharmoi (Purifications). Some contemporary scholars argue these books might be one; all agree that interpreting Empedocles is difficult.On cosmological issues, Empedocles takes from the Eleatic school the idea that the universe is unborn, has always been and always will be. He also continues Anaxagoras' thought on the four "roots" (i.e., classical elements), that by intermixing, they create all things around us. These roots are fire, air, earth, and water. Crucially, he adds two more components, the immaterial forces of love and strife. These two forces are opposite and by acting upon the material of the four roots unite in harmony or tear apart the four roots, with the resulting mixture being all things that exist. Empedocles uses an analogy of how this is possible: as a painter uses a few basic colors to create a painting, the same happens with the four roots. It is not quite clear if love and strife co-operate or have a greater plan, but love and strife are in a continual cycle that generates life and the earth we live in. Other beings, apart from the four roots and love and strife, according to Empedocles' Purifications are mortals, gods, and daemons. Like Pythagoras, Empedocles believed in the soul's transmigration and was vegetarian.

Atomists: Leucippus and Democritus
Leucippus and Democritus both lived in Abdera, in Thrace. They are most famous for their atomic cosmology even though their thought included many other fields of philosophy, such as ethics, mathematics, aesthetics, politics, and even embryology. The atomic theory of Leucippus and Democritus was a response to the Eleatic school, who held that motion is not possible because everything is occupied with What-is. Democritus and Leucippus reverted the Eleatic axiom, claiming that since motions exist, What-is-not must also exist; hence void exists. Democritus and Leucippus were skeptics regarding the reliability of our senses, but they were confident that motion exists. Atoms, according to Democritus and Leucippus, had some characteristics of the Eleatic What-is: they were homogeneous and indivisible. These characteristics allowed answers to Zeno's paradoxes. Atoms move within the void, interact with each other, and form the plurality of the world we live in, in a purely mechanical manner.One conclusion of the Atomists was determinism - the philosophical view that all events are determined completely by previously existing causes. As Leucippus said, (DK 67 B2) "Nothing comes to be random but everything is by reason and out of necessity." Democritus concluded that since everything is atoms and void, several of our senses are not real but conventional. Color, for example, is not a property of atoms; hence our perception of color is a convention. As Democritus said, (DK 68 B9) "By convention sweet, by convention bitter, by convention hot, by convention cold, by convention colour; in reality atoms and void." This can be interpreted in two ways. According to James Warren there is an eliminativist interpretation, such that Democritus means that color is not real, and there is a relativist interpretation, such that Democritus means that color and taste are not real but are perceived as such by our senses through sensory interaction.

Sophists
The sophists were a philosophical and educational movement that flourished in ancient Greece before Socrates. They attacked traditional thinking, from gods to morality, paving the way for further advances of philosophy and other disciplines such as drama, social sciences, mathematics, and history.Plato disparaged the sophists, causing long-lasting harm to their reputation. Plato thought philosophy should be reserved for those who had the appropriate intellect to understand it; whereas the sophists would teach anyone who would pay tuition. The sophists taught rhetoric and how to address issues from multiple viewpoints. Since the sophists and their pupils were persuasive speakers at court or in public, they were accused of moral and epistemological relativism, which indeed some sophists appeared to advocate. Prominent sophists include Protagoras, Gorgias, Hippias, Thrasymachus, Prodicus, Callicles, Antiphon, and Critias.Protagoras is mostly known for two of his quotes. One is that  "[humans are..] the measure of all things, of things that are that they are, of things that are not that they are not" which is commonly interpreted as affirming philosophical relativism, but it can also be interpreted as claiming that knowledge is only relevant to humankind, that moral rightness and other forms of knowledge are relevant to and limited to human mind and perception. The other quote is, "Concerning the gods, I cannot ascertain whether they exist or whether they do not, or what form they have; for there are many obstacles to knowing, including the obscurity of the question and the brevity of human life."Gorgias wrote a book named On Nature, in which he attacked the Eleatics' concepts of What-is and What-is-not. He claimed it is absurd to hold that nonexistence exists, and that What-is was impossible since it had to either be generated or be unlimited and neither is sufficient. There is an ongoing debate among modern scholars whether he was a serious thinker, a precursor of extreme relativism and skepticism, or merely a charlatan.Antiphon placed natural law against the law of the city. One need not obey the city's laws as long as one will not get caught. One could argue that Antiphon was a careful hedonist—rejecting dangerous pleasures.

Philolaous of Croton and Diogenes of Apollonia
Philolaus of Croton and Diogenes of Apollonia from Thrace (born c. 460 BCE) are considered the last generation of pre-Socratics. Rather than advancing a cosmological perspective on how our universe is constructed, they are mostly noted for advancing abstract thinking and argumentation.
Pythagorianism, Anaxagoras and Empedocles influenced Philolaus. He attempted to explain both the variety and unity of the cosmos. He addressed the need to explain how the various masses of the universe interact among them and coined the term Harmonia, a binding force that allows mass to take shape. The structure of the cosmos consisted of apeira (unlimiteds) and perainonta (limiters).
Diogenes of Apollonia returned to Milesian monism, but with a rather more elegant thought. As he says in DK64 B2 "It seems to me, overall, that all things are alterations of the same things and are the same thing". He explains that things, even when changing shapes, remain ontologically the same.

Topics
Knowledge
The mythologoi, Homer and Hesiod, along with other poets, centuries before the pre-Socratics, thought that true knowledge was exclusive to the divine. But starting with Xenophanes, the pre-Socratics moved towards a more secular approach to knowledge. The pre-Socratics sought a method to understand the cosmos, while being aware that there is a limit to human knowledge.While Pythagoras and Empedocles linked their self-proclaimed wisdom to their divinely inspired status, they tried to teach or urge mortals to seek the truth about the natural realm—Pythagoras by means of mathematics and geometry and Empedocles by exposure to experiences. Xenophanes thought that human knowledge was merely an opinion that cannot be validated or proven to be true. According to Jonathan Warren, Xenophanes set the outline of the nature of knowledge. Later, Heraclitus and Parmenides stressed the capability of humans to understand how things stand in nature through direct observation, inquiry, and reflection.

Theology
Pre-Socratic thought contributed to the demythologization of the Greek popular religion. The narrative of their thought contributed to shifting the course of ancient Greek philosophy and religion away from the realm of divinity and even paved the way for teleological explanations. They attacked the traditional representations of gods that Homer and Hesiod had established and put Greek popular religion under scrutiny, initiating the schism between natural philosophy and theology.  Pre-Socratic philosophers did not have atheistic beliefs, but it should be kept in mind that being an atheist those days was not without social or legal dangers. Despite that, arguments rejecting deities were not barred from the public sphere which can be seen in Protagoras's quotation on the gods: "About the gods I am able to know neither that they exist nor that they do not exist."The theological thought starts with the Milesian philosophers. It is evident in Anaximander's idea of the apeiron steering everything, which had other abilities usually attributed to Zeus. Later, Xenophanes developed a critique of the anthropomorphism of the gods. Xenophanes set three preconditions for God: he had to be all good, immortal and not resembling humans in appearance, which had a major impact on western religious thought.The theological thought of Heraclitus and Parmenides is not entirely certain, but it is generally accepted that they believed in some kind of divinity. The Pythagoreans and Empedocles believed in the transmigration of souls. Anaxagoras asserted that cosmic intelligence (nous) gives life to things. Diogenes of Appollonia expanded this line of thinking and might have constructed the first teleological argument "it would not be possible without Intellection for it so to be divided up that it has the measures of all things — of winter and summer and night and day and rains and winds and fair weather. The other things, too, if one wishes to consider them, one would find disposed of in the best possible way." While some pre-Socratics were trying to find alternatives to divinity, others were setting the foundation of explaining the universe in terms of teleology and intelligent design by a divine force.

Medicine
Prior to the pre-Socratics, health and illness were thought to be governed by gods. Pre-Socratic philosophy and medicine advanced in parallel, with medicine as a part of philosophy and vice versa. It was Hippocrates (often hailed as the father of medicine) who separated – but not completely – the two domains. Physicians incorporated pre-Socratic philosophical ideas about the nature of the world in their theoretical framework, blurring the border between the two domains. An example is the study of epilepsy, which in popular religion was thought to be a divine intervention to human life, but Hippocrates' school attributed it to nature, just as Milesian rationalism demythologized other natural phenomena such as earthquakes. The systematic study of anatomy, physiology, and illnesses led to the discovery of cause-effect relations and a more sophisticated terminology and understanding of the diseases that ultimately yielded rational science.

Cosmology
The pre-Socratics were the first to attempt to provide reductive explanations for a plethora of natural phenomena.Firstly, they were preoccupied with the mystery of the cosmic matter—what was the basic substance of the universe? Anaximander suggested apeiron (limitless), which hints, as Aristotle analyzed, there is no beginning and no end to it, both chronologically and within the space. Anaximenes placed aêr (air) as the primary principle, probably after realizing the importance of air to life and/or the need to explain various observable changes. Heraclitus, also seeking to address the issue of the ever changing world, placed fire as the primary principle of the universe, that transforms to water and earth to produce the universe. Ever-transforming nature is summarized by Heraclitus' axiom panta rhei (everything is in a state of flux). Parmenides suggested two ever-lasting primary building blocs, night and day, which together form the universe. Empedocles increased the building blocks to four and named them roots, while also adding Love and Strife, to serve as the driving force for the roots to mingle. Anaxagoras extended even more the plurality of Empedocles, claiming everything is in everything, myriads of substances were mixing among each other except one, Nous (mind) that orchestrates everything—but did not attribute divine characteristics to Nous. Leucippus and Democritus asserted the universe consists of atoms and void, while the motion of atoms is responsible for the changes we observe.

Rationalism, observation and the beginning of scientific thought
The pre-Socratic intellectual revolution is widely considered to have been the first step towards liberation of the human mind from the mythical world and initiated a march towards reason and scientific thought that yielded modern western philosophy and science. The pre-Socratics sought to understand the various aspects of nature by means of rationalism, observations, and offering explanations that could be deemed as scientific, giving birth to what became Western rationalism.  Thales was the first to seek for a unitary arche of the world. Whether arche meant the beginning, the origin, the main principle or the basic element is unclear, but was the first attempt to reduce the explanations of the universe to a single cause, based on reason and not guided by any sort of divinity.  Anaximander offered the principle of sufficient reason, a revolutionary argument that would also yield the principle that nothing comes out of nothing. Most of pre-Socratics seemed indifferent to the concept of teleology, especially the Atomists who fiercely rejected the idea. According to them, the various phenomena were the consequence of the motion of atoms without any purpose. Xenophanes also advanced a critique of anthropomorphic religion by highlighting in a rational way the inconsistency of depictions of the gods in Greek popular religion.Undoubtedly, pre-Socratics paved the way towards science, but whether what they did could constitute science is a matter of debate. Thales had offered the first account of a reduction and a generalization, a significant milestone towards scientific thought. Other pre-Socratics also sought to answer the question of arche, offering various answers, but the first step towards scientific thought was already taken. Philosopher Karl Popper, in his seminal work Back to Presocratics (1958) traces the roots of modern science (and the West) to the early Greek philosophers. He writes: "There can be little doubt that the Greek tradition of philosophical criticism had its main source in Ionia ... It thus leads the tradition which created the rational or scientific attitude, and with it our Western civilization, the only civilization, which is based upon science (though, of course, not upon science alone)." Elsewhere in the same study Popper diminishes the significance of the label they should carry as purely semantics. "There is the most perfect possible continuity of thought between [the Presocratics'] theories and the later developments in physics. Whether they are called philosophers, or pre-scientists, or scientists, matters very little." Other scholars did not share the same view. F. M. Cornford considered the Ionanians as dogmatic speculators, due to their lack of empiricism.

Reception and legacy
Antiquity
The pre-Socratics had a direct influence on classical antiquity in many ways. The philosophic thought produced by the pre-Socratics heavily influenced later philosophers, historians and playwrights. One line of influence was the Socrato-Ciceronian tradition, while the other was the Platonic-Aristotelian.Socrates, Xenophon and Cicero were highly influenced by the physiologoi (naturalists) as they were named in ancient times. The naturalists impressed young Socrates and he was interested in the quest for the substance of the cosmos, but his interest waned as he became steadily more focused on epistemology, virtue, and ethics rather than the natural world. According to Xenophon, the reason was that Socrates believed humans incapable of comprehending the cosmos. Plato, in the Phaedo, claims that Socrates was uneasy with the materialistic approach of the pre-Socratics, particularly Anaxagoras. Cicero analyzed his views on the pre-Socratics in his Tusculanae Disputationes, as he distinguished the theoretical nature of pre-Socratic thought from previous "sages" who were interested in more practical issues. Xenophon, like Cicero, saw the difference between pre-Socratics and Socrates being his interest in human affairs (ta anthropina).The pre-Socratics deeply influenced both Plato and Aristotle. Aristotle discussed the pre-Socratics in the first book of Metaphysics, as an introduction to his own philosophy and the quest for arche. He was the first to state that philosophy starts with Thales. It is not clear whether Thales talked of water as arche, or that was a retrospective interpretation by Aristotle, who was examining his predecessors under the scope of his views. More crucially, Aristotle  criticized the pre-Socratics for not identifying a purpose as a final cause, a fundamental idea in Aristotelian metaphysics. Plato also attacked pre-Socratic materialism.Later, during the Hellenistic era, philosophers of various currents focused on the study of nature and advanced pre-Socratic ideas. The Stoics incorporated features from Anaxagoras and Heraclitus, such as nous and fire respectively. The Epicureans saw Democritus' atomism as their predecessor while the Sceptics were linked to Xenophanes.

Modern era
The pre-Socratics, along with the rest of ancient Greece,  invented the central concepts of Western civilization: freedom, democracy, individual autonomy and rationalism. Francis Bacon, a 16th-century philosopher known for advancing the scientific method, was probably the first philosopher of the modern era to use pre-Socratic axioms extensively in his texts. He criticized the pre-Socratic theory of knowledge by Xenophanes and others, claiming that their deductive reasoning could not yield meaningful results—an opinion contemporary philosophy of science rejects. Bacon's fondness for the pre-Socratics, especially Democritus' atomist theory, might have been because of his anti-Aristotelianism.Friedrich Nietzsche admired the pre-Socratics deeply, calling them "tyrants of the spirit" to mark their antithesis and his preference against Socrates and his successors. Nietzsche also weaponized pre-Socratic antiteleology, coupled with the materialism exemplified by Democritus, for his attack on Christianity and its morals. Nietzsche saw the pre-Socratics as the first ancestors of contemporary science—linking Empedocles to Darwinism and Heraclitus to physicist Helmholtz. According to his narrative, limned in many of his books, the pre-Socratic era was the glorious era of Greece, while the so-called Golden Age that followed was an age of decay, according to Nietzsche. Nietzsche incorporated the pre-Socratics in his Apollonian and Dionysian dialectics, with them representing the creative Dionysian aspect of the duo.Martin Heidegger found the roots of his phenomenology and later thinking of Things and the Fourfold in the pre-Socratics, considering Anaximander, Parmenides, and Heraclitus as the original thinkers on being, which he identified in their work as physis [φύσις] (emergence, contrasted against κρύπτεσθαι, kryptesthai, in Heraclitus’ Fragment 123) or aletheia [αλήθεια] (truth as unconcealment).
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Pluralist theories of truth
A pluralist theory of truth is a theory of truth which posits that there may be more than one property that makes a proposition true.

Overview
Most traditional theories of truth are monist: that is, they hold that there is one and only property the having of which makes a belief or proposition true. Pluralist theories of truth deny this assumption. According to pluralism, ethical propositions might be true by more than one property, for example by virtue of coherence; propositions about the physical world might also be true by corresponding to the objects and properties they are about. Pluralism, in short, holds out the prospect that propositions might be "true in more than one way".
Crispin Wright is the most well-known advocate of pluralism about truth. In his 1992 book Truth and Objectivity, Wright argued that any predicate which satisfied certain platitudes about truth qualified as a truth predicate. In some discourses, Wright argued, the role of the truth predicate might be played by the notion of superassertibility.Michael Lynch (philosopher) has recently advocated a different type of pluralism about truth. In a series of articles and in his 2009 book Truth as One and Many Lynch argues that we should see truth as a functional property capable of being multiply manifested in distinct properties like correspondence or coherence.

See also
Criteria of truth
Degrees of truth
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Ann Pettifor
Ann Pettifor (born February 1947) is a British economist who advises governments and organisations. She has published several books. Her work focuses on the global financial system, sovereign debt restructuring, international finance and sustainable development. Pettifor is best known for correctly predicting the financial crisis of 2007–08. She was one of the leaders of the Jubilee 2000 debt cancellation campaign.
She is the director of Policy Research In Macroeconomics (PRIME) a network of economists researching Keynesian monetary theory and policies, an honorary research fellow at the Political Economy Research Centre at City, University of London (CITYPERC), Chair of the  Political Economy Research Centre's Advisory Board at Goldsmiths, a fellow of the New Economics Foundation, a director of  Advocacy International and a trustee of the PREP Foundation for pluralist economics. Pettifor is a member of the Green New  Deal Group of economists, environmentalists and entrepreneurs.

Biography
Lynda Ann Pettifor was born in South Africa in February 1947, and graduated with a degree in politics and economics from the University of the Witwatersrand. In the 1980s she held several posts as adviser to Frances Morrell, the leader of the Inner London Education Authority and later advised  Greater London Council, Ken Livingstone. She also advised the Right Hon. Margaret Beckett MP who went on to serve in the 1997 Labour government. She also worked as a lobbyist for Ian Greer Associates.
Pettifor co-founded the Jubilee 2000 worldwide campaign for the cancellation of the debts of the poorest countries. In 1998 Jubilee 2000 organised a human chain of approximately 70,000 people, which surrounded the 1998 G8 summit in Birmingham, United Kingdom. In 1999 at the Cologne G8 Summit the G8 agreed to write off approximately $100 billion of third world debt owed by 37 countries, in large part due to the campaign. Jubilee 2000 had supporters including Pope John Paul II, Muhammad Ali, Bono, Tony Blair, Gordon Brown and Bill Clinton. The Independent would later describe her work on the campaign as 'genius'.At the conclusion of the Jubilee 2000 campaign Pettifor joined the New Economics Foundation in London where she headed their research unit on global macro-economics.Pettifor became a member of the Green New  Deal Group of economists, environmentalists and entrepreneurs that published The Green New Deal in July 2008. The group argued that "The triple crunch of financial meltdown, climate change and ‘peak oil’ has its origins firmly rooted in the current model of globalisation. Financial deregulation has facilitated the creation of almost limitless credit. With this credit boom have come irresponsible and often fraudulent patterns of lending, creating inflated bubbles in assets such as property, and powering environmentally unsustainable consumption."
In the 2010 general election Pettifor attempted to stand for Parliament as a Labour candidate and was shortlisted in the North West Durham selection process but lost to Pat Glass. She has also unsuccessfully stood as a local election candidate for the West End ward on Westminster City Council.
As a director of Advocacy International she worked on designing and promoting the MamaYe campaign together with Options Consultancy Services. Working in five African countries the campaign makes life-saving changes for mothers and babies during pregnancy and childbirth.In September 2015, she was appointed to the British Labour Party's Economic Advisory Committee, convened by Shadow Chancellor John McDonnell and reporting to Labour Party Leader Jeremy Corbyn, regarding which she stated that she was honoured to be asked to serve with such distinguished colleagues and that she hoped to play her part in overturning the Chancellor's deficit fetishism, and his employment of it as a smokescreen for an attack on the state. She currently resides in London, England.
Pettifor contributed an article to the Labour in the City Anthology in October 2018, which was launched at the City Corporation by Alistair Darling. Pettifor argues that far more radical reforms are needed to prevent a recurrence of the 2008 crisis.

Awards
Pettifor was granted the freedom of the city of Callao in Peru in 1999 (for her work on debt cancellation for Peru); and the Pax Christi International Peace Award in 2000. In 2001 she was awarded an honorary doctorate by Lord Patten, Vice-Chancellor of Newcastle University, and in the same year was honoured with a Masters of Letters Degree (a Lambeth Degree) by the Archbishop of Canterbury. The President of Nigeria, President Obasanjo made her a Member of the Order of the Niger (MON) for her work in leading the campaign to write off billions of dollars of debt owed by Africa's poorest countries. In 2018, she was awarded with the Hannah Arendt Prize.

Works
Pettifor is known for correctly predicting the global financial crises in several publications including in the book The Real World Economic Outlook, and summarised in the New Statesman in an article published on 1 September 2003 entitled "Coming soon: The new poor”. This was followed by her September 2006 book The Coming First World Debt Crisis.
1996: Debt, the Most Potent Form of Slavery: : a discussion of the role of Western lending policies in subordinating the economies of poor countries. Debt Crisis Network.
2000: Kicking the Habit: Finding a Lasting Solution to Addictive Lending and Borrowing and Its Corrupting Side-Effects (Joseph Hanlon & Angela Travis). Jubilee 2000 Coalition.
2001: It Takes Two to Tango: Creditor Co-Responsibility for Argentina's Crisis – and the Need for Independent Resolution (with Liana Cisneros & Alejandro Olmos). New Economics Foundation.
2002: Chapter 9/11?: Resolving International Debtcrises – The Jubilee Framework for International Insolvency. New Economics Foundation. ISBN 978-1-899407-44-6
2003: The Real World Economic Outlook Palgrave Macmillan. ISBN 978-1-4039-1794-2
2006: The Coming First World Debt Crisis. Palgrave Macmillan. ISBN 978-0-230-00784-0
2008: The Green New Deal – Joined up policies to solve the triple crunch of credit crises, climate change and high oil prices  New Economics Foundation. ISBN 978-1-904882-35-0
2013: National Plan for the UK: From Austerity to the Age of the Green New Deal New Economics Foundation
2014: Just Money: How Society Can Break the Despotic Power of Finance. Commonwealth Publishing.
2017: The Production of Money – How to Break the Power of Bankers, Verso ISBN 9781786631374
2019: The Case for the Green New Deal. Verso ISBN 9781788738156

Answer the question based on the given passages. Only give me the answer and do not output any other words.

Question: The Pluralist school is said to have included what creator of the theory of atomism? 



Answer: Leucippus