# Carl Jung

Carl Gustav Jung (/jʊŋ/ YUUNG; German:; 26 July 1875 – 6 June 1961) was a Swiss psychiatrist, psychotherapist, and psychologist who founded the school of analytical psychology. He was a prolific author, illustrator, and correspondent, and a complex and controversial character, in certain ways best known through his autobiography Memories, Dreams, Reflections.
Jung's work has been influential in the fields of psychiatry, anthropology, archaeology, literature, philosophy, psychology, and religious studies. He worked as a research scientist at the Burghölzli psychiatric hospital in Zurich, under Eugen Bleuler. Jung established himself as an influential mind, developing a friendship with Sigmund Freud, founder of psychoanalysis, conducting a lengthy correspondence paramount to their joint vision of human psychology. Jung is widely regarded as one of the most influential psychologists in history.
Freud saw the younger Jung not only as the heir he had been seeking to take forward his "new science" of psychoanalysis but as a means to legitimize his own work: Freud and other contemporary psychoanalysts were Jews facing rising antisemitism in Europe, and Jung was Christian. Freud secured Jung's appointment as president of Freud's newly founded International Psychoanalytical Association. Jung's research and personal vision, however, made it difficult to follow his older colleague's doctrine, and they parted ways. This division was painful for Jung and resulted in the establishment of Jung's analytical psychology, as a comprehensive system separate from psychoanalysis. Scholar Yosef Hayim Yerushalmi believed that what he claims to be Jung's antisemitic remarks may be a clue to the schism.
Among the central concepts of analytical psychology is individuation—the lifelong psychological process of differentiation of the self out of each individual's conscious and unconscious elements. Jung considered it to be the main task of human development. He created some of the best-known psychological concepts, including synchronicity, archetypal phenomena, the collective unconscious, the psychological complex, and extraversion and introversion. His treatment of American businessman and politician Rowland Hazard in 1926 with his conviction that alcoholics may recover if they have a "vital spiritual (or religious) experience" played a crucial role in the chain of events that led to the formation of Alcoholics Anonymous. Jung was an artist, craftsman, builder, and prolific writer. Many of his works were not published until after his death, and some remain unpublished.

## Biography
### Early life
#### Childhood

Carl Gustav Jung was born 26 July 1875 in Kesswil, in the Swiss canton of Thurgau, as the first surviving son of Paul Achilles Jung (1842–1896) and Emilie Preiswerk (1848–1923). His birth was preceded by two stillbirths and that of a son named Paul, born in 1873, who survived only a few days.
Paul Jung, Carl's father, was the youngest son of a noted German-Swiss professor of medicine at Basel, Karl Gustav Jung (1794–1864). Paul's hopes of achieving a fortune never materialised, and he did not progress beyond the status of an impoverished rural pastor in the Swiss Reformed Church. Emilie Preiswerk, Carl's mother, had also grown up in a large family whose Swiss roots went back five centuries. Emilie was the youngest child of a distinguished Basel churchman and academic, Samuel Preiswerk (1799–1871), and his second wife. Samuel Preiswerk was an Antistes, the title given to the head of the Reformed clergy in the city, as well as a Hebraist, author, and editor, who taught Paul Jung as his professor of Hebrew at Basel University.
Jung's father was appointed to a more prosperous parish in Laufen when Jung was six months old. Tensions between father and mother had developed. Jung's mother was an eccentric and depressed woman; she spent considerable time in her bedroom, where she said spirits visited her at night. Though she was normal during the day, Jung recalled that at night his mother became strange and mysterious. He said that one night, he saw a faintly luminous and indefinite figure coming from her room, with a head detached from the neck and floating in the air in front of the body. Jung had a better relationship with his father.
Jung's mother left Laufen for several months of hospitalization near Basel for an unknown physical ailment. His father took Carl to be cared for by Emilie Jung's unmarried sister in Basel, but he was later brought back to his father's residence. Emilie Jung's continuing bouts of absence and depression deeply troubled her son and caused him to associate women with "innate unreliability", whereas "father" meant for him reliability, but also powerlessness. In his memoir, Jung would remark that this parental influence was the "handicap I started off with". Later, these early impressions were revised: "I have trusted men friends and been disappointed by them, and I have mistrusted women and was not disappointed." After three years living in Laufen, Paul Jung requested a transfer. In 1879, he was called to Kleinhüningen, next to Basel, where his family lived in a church parsonage. The relocation brought Emilie Jung closer to contact with her family and lifted her melancholy. When he was 9, Jung's sister Johanna Gertrud (1884–1935) was born. Known in the family as "Trudi", she became a secretary to her brother.

#### Memories of childhood

Jung was a solitary and introverted child. From childhood, he believed that, like his mother, he had two personalities—a modern Swiss citizen and a personality more suited to the 18th century. "Personality Number 1", as he termed it, was a typical schoolboy living in the era of the time. "Personality Number 2" was a dignified, authoritative, and influential man from the past. Though Jung was close to both parents, he was disappointed by his father's academic approach to faith.
Some childhood memories made lifelong impressions on him. As a boy, he carved a tiny mannequin into the end of the wooden ruler from his pencil case and placed it inside it. He added a stone, which he had painted into upper and lower halves, and hid the case in the attic. Periodically, he would return to the mannequin, often bringing tiny sheets of paper with messages inscribed on them in his own secret language. He later reflected that this ceremonial act brought him a feeling of inner peace and security. Years later, he discovered similarities between his personal experience and the practices associated with totems in Indigenous cultures, such as the collection of soul-stones near Arlesheim or the tjurungas of Australia. He concluded that his intuitive ceremonial act was an unconscious ritual, which he had practiced in a way that was strikingly similar to those in distant locations which he, as a young boy, knew nothing about. His observations about symbols, archetypes, and the collective unconscious were inspired, in part, by these early experiences combined with his later research.
At the age of 12, shortly before the end of his first year at the Humanistisches Gymnasium in Basel, Jung was pushed to the ground by another boy so hard he momentarily lost consciousness. (Jung later recognized the incident was indirectly his fault.) A thought then came to him—"Now you won't have to go to school anymore". From then on, whenever he walked to school or began homework, he fainted. He remained home for six months until he overheard his father speaking hurriedly to a visitor about the boy's future ability to support himself. They suspected he had epilepsy. Confronted with his family's poverty, he realized the need for academic excellence. He entered his father's study and began poring over Latin grammar. He fainted three more times but eventually overcame the urge and did not faint again. This event, Jung later recalled, "was when I learned what a neurosis is".

#### University studies and early career

Initially, Jung had aspirations of becoming a Christian minister. His household had a strong moral sense, and several of his family were clergy. Jung had wanted to study archaeology, but his family could not afford to send him further than the University of Basel, which did not teach it. After studying philosophy in his teens, Jung decided against the path of religious traditionalism and decided to pursue psychiatry and medicine. His interest was captured—it combined the biological and spiritual, exactly what he was searching for. In 1895 Jung began to study medicine at the University of Basel. Barely a year later, his father, Paul, died and left the family nearly destitute. They were helped by relatives who also contributed to Jung's studies. During his student days, he entertained his contemporaries with the family legend that his paternal grandfather was the illegitimate son of Goethe and his German great-grandmother, Sophie Ziegler. In later life, he pulled back from this tale, saying only that Sophie was a friend of Goethe's niece.
It was during this early period when Jung was an assistant at the Anatomical Institute at Basel University, that he took an interest in palaeoanthropology and the revolutionary discoveries of Homo erectus and Neanderthal fossils. These formative experiences contributed to his fascination with the evolutionary past of humanity and his belief that an ancient evolutionary layer in the psyche, represented by early fossil hominins, is still evident in the psychology of modern humans.
In 1900, Jung moved to Zurich and began working at the Burghölzli psychiatric hospital under Eugen Bleuler. Bleuler was already in communication with the Austrian neurologist Sigmund Freud. Jung's dissertation, published in 1903, was titled On the Psychology and Pathology of So-Called Occult Phenomena. It was based on the analysis of the supposed mediumship of Jung's cousin Hélène Preiswerk, under the influence of Freud's contemporary Théodore Flournoy. Jung studied with Pierre Janet in Paris in 1902 and later equated his view of the complex with Janet's idée fixe subconsciente. In 1905, Jung was appointed as a permanent 'senior' doctor at the hospital and became a lecturer Privatdozent in the medical faculty of Zurich University. In 1904, he published with Franz Riklin their Diagnostic Association Studies, of which Freud obtained a copy. In 1909, Jung left the psychiatric hospital and began a private practice in his home in Küsnacht.
Eventually, a close friendship and strong professional association developed between the elder Freud and Jung, which left a sizeable correspondence. In late summer 1909, the two sailed for the U.S., where Freud was the featured lecturer at the twentieth-anniversary celebration of the founding of Clark University in Worcester, Massachusetts, the Vicennial Conference on Psychology and Pedagogy, September 7–11. Jung spoke as well and received an honorary degree.
It was during this trip that Jung first began separating psychologically from Freud, his mentor, which occurred after intense communications around their individual dreams. It was during this visit that Jung was introduced to the elder philosopher and psychologist William James, known as the "Father of American psychology," whose ideas Jung would incorporate into his own work. Jung connected with James around their mutual interests in mysticism, spiritualism and psychical phenomena. James wrote to a friend after the conference stating Jung "left a favorable impression," while "his views of Freud were mixed." James died about eleven months later.
The ideas of both Jung and James, on topics including hopelessness, self-surrender, and spiritual experiences, were influential in the development and founding of the international altruistic, self-help movement Alcoholics Anonymous on June 10, 1935, in Akron, Ohio, a quarter of a century after James' death and in Jung's sixtieth year.
For six years, Jung and Freud cooperated in their work. In 1912, however, Jung published Psychology of the Unconscious, which manifested the developing theoretical divergence between the two. Consequently, their personal and professional relationship fractured—each stating the other could not admit he could be wrong. After the culminating break in 1913, Jung went through a difficult and pivotal psychological transformation, exacerbated by the outbreak of the First World War. Henri Ellenberger called Jung's intense experience a "creative illness" and compared it favorably to Freud's own period of what he called neurasthenia and hysteria.$^{:173}$

### Marriage

In 1903, Jung married Emma Rauschenbach (1882–1955), seven years his junior and the elder daughter of a wealthy industrialist in eastern Switzerland, Johannes Rauschenbach-Schenck. Rauschenbach was the owner, among other concerns, of IWC Schaffhausen—the International Watch Company, manufacturer of luxury time-pieces. Upon his death in 1905, his two daughters and their husbands became owners of the business. Jung's brother-in-law—Ernst Homberger—became the principal proprietor, but the Jungs remained shareholders in a thriving business that ensured the family's financial security for decades. Emma Jung, whose education had been limited, showed considerable ability and interest in her husband's research and threw herself into studies and acted as his assistant at Burghölzli. She eventually became a noted psychoanalyst in her own right. The marriage lasted until Emma died in 1955. They had five children:
* Agathe Niehus, born on December 28, 1904
* Gret Baumann, born on February 8, 1906
* Franz Jung-Merker, born on November 28, 1908
* Marianne Niehus, born on September 20, 1910
* Helene Hoerni, born on March 18, 1914
None of the children continued their father's career. The daughters, Agathe and Marianne, assisted in publishing work.
During his marriage, Jung engaged in at least one extramarital relationship: his affair with his patient and, later, fellow psychoanalyst Sabina Spielrein. A continuing affair with Toni Wolff is also alleged.

### Relationship with Freud
#### Meeting and collaboration

Jung and Freud influenced each other during the intellectually formative years of Jung's life. Jung became interested in psychiatry as a student by reading Psychopathia Sexualis by Richard von Krafft-Ebing. In 1900, Jung completed his degree and started work as an intern (voluntary doctor) under the psychiatrist Eugen Bleuler at Burghölzli Hospital. It was Bleuler who introduced him to the writings of Freud by asking him to write a review of The Interpretation of Dreams (1899). In the early 1900s psychology as a science was still in its early stages, but Jung became a qualified proponent of Freud's new "psycho-analysis". Freud needed collaborators and pupils to validate and spread his ideas. Burghölzli was a renowned psychiatric clinic in Zurich, and Jung's research had already gained him international recognition. Jung sent Freud a copy of his Studies in Word Association in 1906. The same year, he published Diagnostic Association Studies, a copy of which he later sent to Freud—who had already purchased a copy. Preceded by a lively correspondence, Jung met Freud for the first time in Vienna on 3 March 1907. Jung recalled the discussion between himself and Freud as interminable and unceasing for 13 hours. Six months later, the then 50-year-old Freud sent a collection of his latest published essays to Jung in Zurich. This began an intense correspondence and collaboration that lasted six years. In 1908, Jung became an editor of the newly founded Yearbook for Psychoanalytical and Psychopathological Research.
In 1909, Jung traveled with Freud and Hungarian psychoanalyst Sándor Ferenczi to the United States; in September, they took part in a conference at Clark University in Worcester, Massachusetts. The conference at Clark University was planned by the psychologist G. Stanley Hall and included 27 distinguished psychiatrists, neurologists, and psychologists. It represented a watershed in the acceptance of psychoanalysis in North America. This forged welcome links between Jung and influential Americans. Jung returned to the United States the next year for a brief visit.
In 1910, Freud proposed Jung, "his adopted eldest son, his crown prince, and successor," for the position of lifetime President of the newly formed International Psychoanalytical Association. However, after forceful objections from his Viennese colleagues, it was agreed Jung would be elected to serve a two-year term of office.

#### Divergence and break

While Jung worked on his Psychology of the Unconscious: a study of the transformations and symbolisms of the libido, tensions manifested between him and Freud because of various disagreements, including those concerning the nature of libido. Jung de-emphasized the importance of sexual development and focused on the collective unconscious: the part of the unconscious that contains memories and ideas that Jung believed were inherited from ancestors. While he did think that the libido was an important source of personal growth, unlike Freud, Jung did not think that the libido alone was responsible for the formation of the core personality.
In 1912, these tensions came to a peak because Jung felt severely slighted after Freud visited his colleague Ludwig Binswanger in Kreuzlingen without paying him a visit in nearby Zurich, an incident Jung referred to as "the Kreuzlingen gesture". Shortly thereafter, Jung again traveled to the US and gave the Fordham University lectures, a six-week series, which were published later in the year as Psychology of the Unconscious, subsequently republished as Symbols of Transformation. While they contain remarks on Jung's dissenting view on the libido, they represent largely a "psychoanalytical Jung" and not the theory of analytical psychology, for which he became famous in the following decades. Nonetheless, it was their publication which, Jung declared, "cost me my friendship with Freud".
Another disagreement with Freud stemmed from their differing concepts of the unconscious. Jung saw Freud's theory of the unconscious as incomplete, unnecessarily negative, and inelastic. According to Jung, Freud conceived the unconscious solely as a repository of repressed emotions and desires. Jung's observations overlap to an extent with Freud's model of the unconscious, what Jung called the "personal unconscious", but his hypothesis is more about a process than a static model, and he also proposed the existence of a second, overarching form of the unconscious beyond the personal, that he named the psychoid—a term borrowed from neo-vitalist philosopher and embryologist Hans Driesch (1867–1941)—but with a somewhat altered meaning. The collective unconscious is not so much a 'geographical location', but a deduction from the alleged ubiquity of archetypes over space and time.
In November 1912, Jung and Freud met in Munich for a meeting among prominent colleagues to discuss psychoanalytical journals. At a talk about a new psychoanalytic essay on Amenhotep IV, Jung expressed his views on how it related to actual conflicts in the psychoanalytic movement. While Jung spoke, Freud suddenly fainted, and Jung carried him to a couch.
Jung and Freud personally met for the last time in September 1913 at the Fourth International Psychoanalytical Congress in Munich. Jung gave a talk on psychological types, the introvert and extraverted types, in analytical psychology.

### Midlife isolation

It was the publication of Jung's book The Psychology of the Unconscious in 1912 that led to the final break with Freud. The letters they exchanged show Freud's refusal to consider Jung's ideas. This rejection caused what Jung described in his posthumously published autobiography, Memories, Dreams, Reflections (1962) as a "resounding censure". Everyone he knew dropped away from him except two of his colleagues. After the Munich congress, he was on the verge of a suicidal psychosis that precipitated his writing of his Red Book, his seven-volume personal diaries that were only published partially and posthumously in 2009. Eleven years later, in 2020, they were published as his Black Books. Jung described his 1912 book as "an attempt, only partially successful, to create a wider setting for medical psychology and to bring the whole of the psychic phenomena within its purview". The book was later revised and retitled Symbols of Transformation in 1952.

#### London 1913–1914

Jung spoke at meetings of the Psycho-Medical Society in London in 1913 and 1914. His travels were soon interrupted by the war, but his ideas continued to receive attention in England primarily through the efforts of Constance Long, who translated and published the first English volume of his collected writings.

#### The Black Books and The Red Book

In 1913, at the age of 38, Jung experienced a horrible "confrontation with the unconscious". He saw visions and heard voices. He worried at times that he was "menaced by a psychosis" or was "doing a schizophrenia". He decided that it was a valuable experience and, in private, he induced hallucinations or, in his words, a process of "active imagination". He recorded everything he experienced in small journals, which Jung referred to in the singular as his Black Book, considering it a "single integral whole", even though some of these original journals have a brown cover. The material Jung wrote was subjected to several edits, hand-written and typed, including another, "second layer" of text, his continual psychological interpretations during the process of editing. Around 1915, Jung commissioned a large red leather-bound book, and began to transcribe his notes and paint, working intermittently for sixteen years.
Jung left no posthumous instructions about the final disposition of what he called the Liber Novus or Red Book. Sonu Shamdasani, a historian of psychology from London, tried for three years to persuade Jung's resistant heirs to have it published. Ulrich Hoerni, Jung's grandson who manages the Jung archives, decided to publish it when the necessary additional funds were raised through the Philemon Foundation. Up to September 2008, fewer than about two dozen people had ever seen it.
In 2007, two technicians for DigitalFusion, working with New York City publishers W. W. Norton & Company, scanned the manuscript with a 10,200-pixel scanner. It was published on 7 October 2009 in German, with a "separate English translation along with Shamdasani's introduction and footnotes" at the back of the book. According to Sara Corbett, reviewing the text for The New York Times, "The book is bombastic, baroque and like so much else about Carl Jung, a willful oddity, synched with an antediluvian and mystical reality."
The Rubin Museum of Art in New York City displayed Jung's Red Book leather folio, as well as some of his original "Black Book" journals, from 7 October 2009 to 15 February 2010. According to them, "During the period in which he worked on this book Jung developed his principal theories of archetypes, collective unconscious, and the process of individuation." Two-thirds of the pages bear Jung's illuminations and illustrations to the text.

### Wartime army service

During World War I, Jung was drafted as an army doctor and soon made commandant of an internment camp for British officers and soldiers. The Swiss were neutral and obliged to intern personnel from either side of the conflict, who crossed their frontier to evade capture. Jung worked to improve the conditions of soldiers stranded in Switzerland and encouraged them to attend university courses.

### Travels

Jung emerged from his period of isolation in the late nineteen-tens with the publication of several journal articles, followed in 1921 with Psychological Types, one of his most influential books. There followed a decade of active publication, interspersed with overseas travels.

#### England (1920, 1923, 1925, 1935, 1938, 1946)

Constance Long arranged for Jung to deliver a seminar in Cornwall in 1920. Another seminar was held in 1923, this one organized by Jung's British protégé Helton Godwin Baynes (known as "Peter") (1882–1943), and another in 1925.
In 1935, at the invitation of his close British friends and colleagues, H. G. Baynes, E. A. Bennet and Hugh Crichton-Miller, Jung gave a series of lectures at the Tavistock Clinic in London, later published as part of the Collected Works.
In 1938, Jung was awarded an honorary degree by the University of Oxford. At the tenth International Medical Congress for Psychotherapy held at Oxford from 29 July to 2 August 1938, Jung gave the presidential address, followed by a visit to Cheshire to stay with the Bailey family at Lawton Mere.
In 1946, Jung agreed to become the first Honorary President of the newly formed Society of Analytical Psychology in London, having previously approved its training programme devised by Michael Fordham.

#### United States 1909–1912, 1924–1925, & 1936–1937

During the period of Jung's collaboration with Freud, both visited the US in 1909 to lecture at Clark University, Worcester, Massachusetts, where both were awarded honorary degrees. In 1912, Jung gave a series of lectures at Fordham University, New York, which were published later in the year as Psychology of the Unconscious. Jung made a more extensive trip westward in the winter of 1924–5, financed and organized by Fowler McCormick and George Porter. Of particular value to Jung was a visit with Chief Mountain Lake of the Taos Pueblo near Taos, New Mexico. Jung made another trip to America in 1936, receiving an honorary degree at Harvard and giving lectures in New York and New England for his growing group of American followers. He returned in 1937 to deliver the Terry Lectures at Yale University, later published as Psychology and Religion.

#### East Africa

In October 1925, Jung embarked on his most ambitious expedition, the "Bugishu Psychological Expedition" to East Africa. He was accompanied by his English friend, "Peter" Baynes, and an American associate, George Beckwith. On the voyage to Africa, they became acquainted with an English woman named Ruth Bailey, who joined their safari a few weeks later. The group traveled through Kenya and Uganda to the slopes of Mount Elgon, where Jung hoped to increase his understanding of "primitive psychology" through conversations with the culturally isolated residents of that area. Later, he concluded that the major insights he had gleaned had to do with himself and the European psychology in which he had been raised. One of Jung's most famous proposed constructs is kinship libido. Jung defined this as an instinctive feeling of belonging to a particular group or family and believed it was vital to the human experience and used this as an endogamous aspect of the libido and what lies amongst the family. This is similar to a Bantu term called Ubuntu that emphasizes humanity and almost the same meaning as kinship libido, which is, "I am because you are."

#### India

In December 1937, Jung left Zurich again for an extensive tour of India with Fowler McCormick. In India, he felt himself "under the direct influence of a foreign culture" for the first time. In Africa, his conversations had been strictly limited by the language barrier, but he could converse extensively in India. Hindu philosophy became an important element in his understanding of the role of symbolism and the life of the unconscious, though he avoided a meeting with Ramana Maharshi. He described Ramana as being absorbed in "the self". During these travels, he visited the Vedagiriswarar Temple, where he had a conversation with a local expert about the symbols and sculptures on the gopuram of this temple. He later wrote about this conversation in his book Aion. Jung became seriously ill on this trip and endured two weeks of delirium in a Calcutta hospital. After 1938, his travels were confined to Europe.

### Later life and death

Jung became a full professor of medical psychology at the University of Basel in 1943 but resigned after a heart attack the next year to lead a more private life. In 1945, he began corresponding with an English Roman Catholic priest, Father Victor White, who became a close friend, regularly visiting the Jungs at the Bollingen estate. Jung became ill again in 1952.
Jung continued to publish books until the end of his life, including Flying Saucers: A Modern Myth of Things Seen in the Skies (1959), which analyzed the archetypal meaning and possible psychological significance of the reported observations of UFOs. In 1961, he wrote his last work, a contribution to Man and His Symbols entitled "Approaching the Unconscious" (published posthumously in 1964). Jung died on 6 June 1961 at Küsnacht after a short illness.$^{:450}$ He had been beset by circulatory diseases.

## Awards

Among his principal distinctions are honorary doctorates from:
* Clark University 1909
* Fordham University 1912
* Harvard University 1936
* University of Allahabad 1937
* University of Benares 1937
* University of Calcutta 1938
* University of Oxford 1938
* University of Geneva 1945
* Swiss Federal Institute of Technology in Zurich 1955 on his 80th birthday
In addition, he was:
* given a Literature prize from the city of Zurich, 1932
* made Titular Professor of the Swiss Federal Institute of Technology in Zurich, ETH 1935
* appointed Honorary Member of the Royal Society of Medicine 1939
* given a Festschrift at Eranos 1945
* appointed President of the Society of Analytical Psychology, London, 1946
* given a Festschrift by students and friends 1955
* named Honorary citizen of Kűsnacht 1960, on his 85th birthday.

## Thought

Jung's thought derived from the classical education he received at school and from early family influences, which on the maternal side were a combination of Reformed Protestant academic theology with an interest in occult phenomena. On his father's side was a dedication to academic discipline emanating from his grandfather, the physician, scientist, and first Basel Professor of Medicine, Karl Gustav Jung, a one-time student activist and convert from Catholicism to Swiss Reformed Protestantism. Family lore suggested there was at least a social connection to the German polymath, Johann Wolfgang Goethe, through the latter's niece, Lotte Kestner, known as "Lottchen" who was a frequent visitor in Jung senior's household.
Carl Jung, the practicing clinician, writer, and founder of analytical psychology, had, through his marriage, the economic security to pursue interests in other intellectual topics of the moment. His early celebrity as a research scientist through the Word Association Test led to the start of prolific correspondence and worldwide travel. It opened academic as well as social avenues, supported by his explorations into anthropology, quantum physics, vitalism, Eastern and Western philosophy. He delved into epistemology, alchemy, astrology, and sociology, as well as literature and the arts. Jung's interest in philosophy and spiritual subjects led many to label him a mystic, although he preferred to be seen as a man of science. Jung, unlike Freud, was deeply knowledgeable about philosophical concepts and sought links between epistemology and emergent theories of psychology.

### Key concepts

Within the field of analytical psychology, a brief survey of major concepts developed by Jung include (alphabetical):
* Anima and animus—(archetype) the contrasexual aspect of a person's psyche. In a woman's psyche, her inner personal masculine is conceived as a complex and an archetypal image; in a man's psyche, his inner personal feminine is conceived both as a complex and an archetypal image.
* Archetype—a concept "borrowed" from anthropology to denote supposedly universal and recurring mental images or themes. Jung's descriptions of archetypes varied over time.
* Archetypal images—universal symbols that mediate opposites in the psyche, often found in religious art, mythology, and fairy tales across cultures.
* Collective unconscious—aspects of unconsciousness experienced by all people in different cultures.
* Complex—the repressed organisation of images and experiences that governs perception and behaviour.
* Extraversion and introversion—personality traits of degrees of openness or reserve contributing to psychological type.
* Individuation—the process of fulfilment of each individual "which negates neither the conscious or unconscious position but does justice to them both".
* Interpersonal relationship—the way people relate to others is a reflection of the way they relate to their own selves. This may also be extended to relations with the natural environment.
* Numinous—a healing, transformative or destructive spiritual power. Also, an invisible power inherent in an object. Jung develops the concept from the work of Rudolf Otto, who based it on the Latin numen.
* Persona—element of the personality that arises "for reasons of adaptation or personal convenience"—the "masks" one puts on in various situations.
* Psychological types—a framework for consciously orienting psychotherapists to patients by raising particular modes of personality to consciousness and differentiation between analyst and patient.
* Shadow—(archetype) the repressed, therefore unknown, aspects of the personality, including those often considered to be negative.
* Self—(archetype) the central overarching concept governing the individuation process, as symbolised by mandalas, the union of male and female, totality, and unity. Jung viewed it as the psyche's central archetype.
* Synchronicity—an acausal principle as a basis for the apparently random concurrence of phenomena.

### Collective unconscious

Since the establishment of psychoanalytic theory, the notion and meaning of individuals having a personal unconscious has gradually come to be commonly accepted. This was popularised by both Freud and Jung. Whereas an individual's personal unconscious is made up of thoughts and emotions that have, at some time, been experienced or held in mind but which have been repressed or forgotten, in contrast, the collective unconscious is neither acquired by activities within an individual's life nor a container of things that are thoughts, memories or ideas which are capable of being conscious during one's life. The contents of it were never naturally "known" through physical or cognitive experience and then forgotten.
The collective unconscious consists of universal heritable elements common to all humans, distinct from other species. However, this does not necessarily imply a genetic cause. It encapsulates fields of evolutionary biology, history of civilization, ethnology, brain and nervous system development, and general psychological development. Considering its composition in practical physiological and psychological terms, "it consists of pre-existent forms, the archetypes, which can only become conscious secondarily and which give definite form to certain psychic contents." Jung writes about causal factors in personal psychology as stemming from, influenced by an abstraction of the impersonal physical layer, the common and universal physiology among all humans. Jung considers that science would hardly deny the existence and basic nature of "instincts", existing as a whole set of motivating urges. The collective unconscious acts as the frame where science can distinguish individual motivating urges, thought to be universal across all individuals of the human species, while instincts are present in all species. Jung contends, "The hypothesis of the collective unconscious is, therefore, no more daring than to assume there are instincts."

#### Archetype

The archetype is a concept "borrowed" from anthropology to denote a process of nature. Jung's definitions of archetypes varied over time and have been the subject of debate regarding their usefulness. Archetypal images, also referred to as motifs in mythology, are universal symbols that can mediate opposites in the psyche, are often found in religious art, mythology and fairy tales across cultures. Jung saw archetypes as pre-configurations in nature that give rise to repeating, understandable, describable experiences. In addition, the concept considers the passage of time and patterns resulting from transformation. Archetypes are said to exist independently of any current event or its effect. They are said to exert influence both across all domains of experience and throughout the stages of each individual's unique development. Being in part based on heritable physiology, they are thought to have "existed" since humans became a differentiated species. They have been deduced through the development of storytelling over tens of thousands of years, indicating repeating patterns of individual and group experience, behaviors, and effects across the planet, apparently displaying common themes.
The concept did not originate with Jung but with Plato, who first conceived of primordial patterns. Later contributions came from Adolf Bastian and Hermann Usener, among others. In the first half of the twentieth century, it proved impossible to objectively isolate and categorize the notion of an archetype within a materialist frame. According to Jung, there are "as many archetypes as there are typical situations in life", and he asserted that they have a dynamic mutual influence on one another. Their alleged presence could be extracted from thousand-year-old narratives, from comparative religion and mythology. Jung elaborated on many archetypes in "The Archetypes and the Collective Unconscious" and in "Aion: Researches into the Phenomenology of the Self". Examples of archetypes might be the shadow, the hero, the self, anima, animus, mother, father, child, and trickster.

#### Shadow

The shadow exists as part of the unconscious mind and is composed of the traits individuals instinctively or consciously resist identifying as their own and would rather ignore, typically repressed ideas, weaknesses, desires, instincts, and shortcomings. Much of the shadow comes as a result of an individual's adaptation to cultural norms and expectations. Thus, this archetype not only consists of all the things deemed unacceptable by society but also those things that are not aligned with one's own personal morals and values.
Jung argues that the shadow plays a distinctive role in balancing one's overall psyche, the counter-balancing to consciousness—"where there is light, there must also be shadow". Without a well-developed shadow (often "shadow work", "integrating one's shadow"), an individual can become shallow and extremely preoccupied with the opinions of others; that is, a walking persona. Not wanting to look at their shadows directly, Jung argues, often results in psychological projection. Individuals project imagined attitudes onto others without awareness. The qualities an individual may hate (or love) in another may manifest in those who do not see the external, material truth. In order to truly grow as an individual, Jung believed that both the persona and shadow should be balanced.
The shadow can often appear as a dark, wild, exotic figure in dreams or visions.

### Extraversion and introversion

Jung was one of the first people to define introversion and extraversion in a psychological context. In Jung's Psychological Types, he theorizes that each person falls into one of two categories: the introvert or the extravert. Jung compares these two psychological types to ancient archetypes, Apollo and Dionysus. The introvert is likened to Apollo, who shines a light on understanding. The introvert is focused on the internal world of reflection, dreaming, and vision. Thoughtful and insightful, the introvert can sometimes be uninterested in joining the activities of others. The extravert is associated with Dionysus, interested in joining the activities of the world. The extravert is focused on the outside world of objects, sensory perception, and action. Energetic and lively, the extravert may lose their sense of self in the intoxication of Dionysian pursuits. Jungian introversion and extraversion is quite different from the modern idea of introversion and extraversion. Modern theories often stay true to behaviourist means of describing such a trait (sociability, talkativeness, assertiveness, etc.), whereas Jungian introversion and extraversion are expressed as a perspective: introverts interpret the world subjectively, whereas extraverts interpret the world objectively.

### Persona

In his psychological theory—which is not necessarily linked to a particular theory of social structure—the persona appears as a consciously created personality or identity, fashioned out of part of the collective psyche through socialization, acculturation and experience. Jung applied the term persona explicitly because, in Latin, it means both personality and the masks worn by Roman actors of the classical period, expressive of the individual roles played.
The persona, he argues, is a mask for the "collective psyche", a mask that 'pretends' individuality so that both self and others believe in that identity, even if it is really no more than a well-played role through which the collective psyche is expressed. Jung regarded the "persona-mask" as a complicated system that mediates between individual consciousness and the social community: it is "a compromise between the individual and society as to what a man should appear to be". But he also makes it quite explicit that it is, in substance, a character mask in the classical sense known to theatre, with its double function: both intended to make a certain impression on others and to hide (part of) the true nature of the individual. The therapist then aims to assist the individuation process through which the client (re)gains their "own self"—by liberating the self, both from the deceptive cover of the persona and from the power of unconscious impulses.
Jung has influenced management theory because managers and executives create an appropriate "management persona" (a corporate mask) and a persuasive identity, and they have to evaluate what sort of people the workers are, to manage them (for example, using personality tests and peer reviews).

### Evolutionary Thought

Of his early years, Jung would write that "mentally my greatest adventure had been the study of Kant and Schopenhauer. The great news of the day was the work of Charles Darwin." While Jung’s conception of human psychology is grounded in Darwinian evolutionary theory it is important to note that his evolutionary thought had a distinctively German quality to it. This is because the idiosyncratic reception of Darwin in late nineteenth and early twentieth century Germany resulted in the integration of Darwin's ideas with German embryological and developmental traditions formulated by the Naturphilosophen and theorists such as Ernst Haeckel. It was these traditions that formed the intellectual background of Jung’s evolutionary thought.
The result was that Jung's evolutionary conception of mind focused on embryology and development. From this perspective, the emergence of consciousness both in ontogeny (development) and phylogeny (evolution) was built upon much more archaic, affect-based subcortical brain systems. It was this developmental approach to evolution that underpinned his "archaeological" conception of the human psyche consisting of different evolutionary layers, from the deeply archaic to the more evolutionarily recent. Those more archaic structures in the brain Jung believed to be the basis of the “collective unconscious” - an aspect of human psychology shared by all members of the species Homo sapiens.
In commenting on humanity's evolution from an ancient primate ancestor, Jung wrote: 'We keep forgetting that we are primates and that we have to make allowances for these primitive layers in our psyche.' Jung also developed the notion of different evolutionary layers in the psyche in his discussion of fossil hominins such as Pithecanthropus (Homo erectus). As he writes:
For just as a man has a body that is no different in principle from that of an animal, so also his psychology has a whole series of lower storeys [sic] in which the spectres from humanity’s past epochs still dwell, then the animal souls from the age of Pithecanthropus and the hominids, then the “psyche” of the cold-blooded saurian.
Jung’s notion of different evolutionary layers in the human mind has been compared with the work of neuroscientist Jaak Panksepp, particularly as outlined in his book The Archaeology of Mind: Neuroevolutionary Origins of Human Emotions. Of these affinities it has been suggested that ‘Jung and Panksepp have, independently it seems, developed similar metaphors of an archeologically layered psyche in which jewels and treasures are discoverable in the deepest phylogenetically ancient regions of the brain – for Jung they are archetypal structures for Panksepp cross-species homologies.'
Significantly, in a 2017 article entitled "The Affective Core of the Self: A Neuro-Archetypical Perspective on the Foundations of Human (and Animal) Subjectivity", when noting Jung’s belief that archetypes may be related to evolutionarily ancient subcortical brain systems, Panksepp and colleagues wrote that "such assertions by Jung were not only quite farsighted, but they actually open ways to connect his theory of the psyche with the most advanced scientific theories and discoveries of our day."

### Spirituality

Jung's work on himself and his patients convinced him that life has a spiritual purpose beyond material goals. The main task for people, he believed, is to discover and fulfill their deep, innate potential. Based on his study of Christianity, Hinduism, Buddhism, Gnosticism, Taoism, and other traditions, Jung believed this journey of transformation, which he called individuation, is at the mystical heart of all religions. It is a journey to meet the self and at the same time to meet the Divine. Unlike Freud's atheistic worldview, Jung's pantheism may have led him to believe that spiritual experience was essential to well-being, as he specifically identifies individual human life with the universe as a whole.
In 1959, Jung was asked by the host, John Freeman, on the BBC interview program Face to Face whether he believed in God, to which Jung answered, "I do not need to believe. I know." Jung's ideas on religion counterbalance Freudian skepticism. Jung's idea of religion as a practical road to individuation is still treated in modern textbooks on the psychology of religion, though his ideas have been criticized.
Jung recommended spirituality as a cure for alcoholism, and is considered to have had an indirect role in establishing Alcoholics Anonymous. Jung treated an American patient named Rowland Hazard III who had chronic alcoholism. After working with the patient for some time and achieving no significant progress, Jung told the man that his alcoholic condition was near to hopeless, save only the possibility of a spiritual experience. Jung noted that, occasionally, such experiences had been known to reform alcoholics when all other options had failed. Hazard took Jung's advice seriously and sought a personal, spiritual experience. He returned to the United States and joined a Christian evangelical movement known as the Oxford Group. He told other alcoholics what Jung had told him about the importance of a spiritual experience. One of the alcoholics he brought into the Oxford Group was Ebby Thacher, a long-time friend and drinking buddy of William Griffith Wilson, later co-founder of Alcoholics Anonymous. Thacher told Wilson about the Oxford Group, and through them, Wilson became aware of Hazard's experience with Jung. The influence of Jung thus indirectly found its way into the formation of Alcoholics Anonymous, the original twelve-step program.
The above claims are documented in the letters of Jung and Wilson. Although some historians dispute the detail, Jung discussed an Oxford Group member, who may have been the same person, in talks around 1940. The remarks were distributed privately in transcript form, from shorthand taken by an attender (Jung reportedly approved the transcript), and later recorded in his Collected Works, "For instance, when a member of the Oxford Group comes to me in order to get treatment, I say, 'You are in the Oxford Group; so long as you are there, you settle your affair with the Oxford Group. I can't do it better than Jesus.'" Jung goes on to state he has seen similar cures among Roman Catholics. The 12-step program of Alcoholics Anonymous has a psychological backdrop involving the human ego and the dichotomy between the conscious and unconscious mind.

### Inquiries into the paranormal

Jung had an apparent interest in the paranormal and occult. For decades he attended seances and claimed to have witnessed "parapsychic phenomena". Initially, he attributed these to psychological causes, even delivering a 1919 lecture in England for the Society for Psychical Research on "The Psychological Foundations for the belief in spirits". However, he began to "doubt whether an exclusively psychological approach can do justice to the phenomena in question" and stated that "the spirit hypothesis yields better results". But he retained some skepticism toward his own postulation, as he could not find material evidence of the existence of spirits.
Jung's ideas about the paranormal culminated in "synchronicity". This is the idea that certain coincidences manifest in the world, have exceptionally intense meaning to observers. Such coincidences have a great effect on the observer from multiple cumulative aspects: from the immediate personal relevance of the coincidence to the observer, from the peculiarities of (the nature of, the character, novelty, curiosity of) any such coincidence; from the sheer improbability of the coincidence, having no apparent causal link (hence Jung's essay subtitle "An Acausal Connecting Principle"). Despite his own experiments failing to confirm the phenomenon he held on to the idea as an explanation for apparent ESP. In addition, he proposed it as a functional explanation for how the I-Ching worked. However, he was never clear about how synchronicity worked.

### Interpretation of quantum mechanics

Jung influenced one philosophical interpretation (not the science) of quantum physics with the concept of synchronicity regarding some events as non-causal. That idea influenced the physicist Wolfgang Pauli (with whom, via a letter correspondence, Jung developed the notion of unus mundus in connection with the idea of nonlocality) and some other physicists.

### Alchemy

Jung's acquaintance with alchemy came between 1928 and 1930 when he was introduced to a manuscript of The Secret of the Golden Flower, translated by Richard Wilhelm. The work and writings of Jung from the 1930s onwards shifted to a focus on the psychological significance of alchemy.
In 1944, Jung published Psychology and Alchemy, in which he analyzed the alchemical symbols and came to the conclusion that there is a direct relationship between them and the psychoanalytical process. He argued that the alchemical process was the transformation of the impure soul (lead) to perfected soul (gold), and a metaphor for the individuation process.
In 1963, Mysterium Coniunctionis first appeared in English as part of The Collected Works of C. G. Jung. Mysterium Coniunctionis was Jung's last major book and focused on the "Mysterium Coniunctionis" archetype, known as the sacred marriage between the sun and moon. Jung argued that the stages of the alchemists, the blackening, the whitening, the reddening, and the yellowing, could be taken as symbolic of individuation—his chosen term for personal growth (75).

### Art therapy

Jung proposed that art can be used to alleviate or contain feelings of trauma, fear, or anxiety and also to repair, restore, and heal. In his work with patients and his own personal explorations, Jung wrote that art expression and images found in dreams could help recover from trauma and emotional distress. At times of emotional distress, he often drew, painted, or made objects and constructions, which he recognized as more than recreational.

### Dance/movement therapy

Dance and movement therapy, as a form of active imagination, was developed by Jung and Toni Wolff in 1916 and practiced by Tina Keller-Jenny and other analysts. It remained largely unknown until the 1950s when it was rediscovered by Marian Chace and therapist Mary Whitehouse. Whitehouse, after studying with Martha Graham and Mary Wigman, became a dancer and teacher of modern dance, and, along with Swiss dancer Trudi Schoop, is considered one of the founders of dance/movement therapy in the U.S.

### Political views
#### The state

Jung stressed the importance of individual rights in a person's relation to the state and society. He saw that the state was treated as "a quasi-animate personality from whom everything is expected" but that this personality was "only camouflage for those individuals who know how to manipulate it". He referred to the state as a form of slavery. He also thought that the state "swallowed up [people's] religious forces", and therefore that the state had "taken the place of God"—making it comparable to a religion in which "state slavery is a form of worship". Jung observed that "stage acts of [the] state" are comparable to religious displays:
   Brass bands, flags, banners, parades and monster demonstrations are no different in principle from ecclesiastical processions, cannonades and fire to scare off demons.
From Jung's perspective, this replacement of God with the state in a mass society leads to the dislocation of the religious drive and results in the same fanaticism of the church-states of the Dark Ages—wherein the more the state is 'worshipped', the more freedom and morality are suppressed; this ultimately leaves the individual psychically undeveloped with extreme feelings of marginalization.

#### Service to the Allies during World War II

Jung was in contact with Allen Dulles of the Office of Strategic Services (predecessor of the Central Intelligence Agency) and provided valuable intelligence on the psychological condition of Hitler. Dulles referred to Jung as "Agent 488" and offered the following description of his service: "Nobody will probably ever know how much Professor Jung contributed to the Allied Cause during the war, by seeing people who were connected somehow with the other side". Jung's service to the Allied cause through the OSS remained classified after the war.

### Relationship to Nazism and antisemitism

In "The State of Psychotherapy Today", published in 1934 in the Zentralblatt für Psychotherapie, Jung wrote: "The Aryan unconscious has a greater potential than the Jewish unconscious" and "The Jew, who is something of a nomad, has never yet created a cultural form of his own and as far as we can see never will". Andrew Samuels argues that his remarks on the "Aryan unconscious" and the "corrosive character" of Freud's "Jewish gospel" demonstrate a form of antisemitism "fundamental to the structure of Jung's thought" but also argues that there is a "pioneering nature of Jung's contributions" and that "his intuition of the importance of exploring difference remains intact."
In 1933, after the Nazis gained power in Germany, Jung became the president of the new International General Medical Society for Psychotherapy (Allgemeine Ärztliche Gesellschaft für Psychotherapie), a professional body which aimed to have affiliated organizations in different countries. The German affiliated organization, the Deutsche Allgemeine Ärztliche Gesellschaft für Psychotherapie, led by Matthias Göring, an Adlerian psychotherapist and a cousin of the prominent Nazi Hermann Göring, excluded Jews. In 1933, the society's Zentralblatt für Psychotherapie journal published a statement endorsing Nazi positions and Hitler's book Mein Kampf. In 1934, Jung wrote in a Swiss publication, the Neue Zürcher Zeitung, that he experienced "great surprise and disappointment" when the Zentralblatt associated his name with the pro-Nazi statement. He did not end his relationship with the Zentralblatt at this time, but he did arrange the appointment of a new managing editor, Carl Alfred Meier of Switzerland. For the next few years, the Zentralblatt under Jung and Meier maintained a position distinct from that of the Nazis in that it continued to acknowledge the contributions of Jewish doctors to psychotherapy. In the face of energetic German attempts to Nazify the international body, Jung resigned from its presidency in 1939, the year the Second World War started.
The International Society's constitution permitted individual doctors to join it directly rather than through one of the national affiliated societies, a provision to which Jung drew attention in a circular in 1934. This implied that German Jewish doctors could maintain their professional status as individual members of the international body, even though they were excluded from the German affiliate, as well as from other German medical societies operating under the Nazis. Jung went on to say, "The main point is to get a young and insecure science into a place of safety during an earthquake."
Scholar Yosef Hayim Yerushalmi believed that Jung's antisemitism may have contributed to the schism between Freud and his circle of psychoanalysts, who were predominantly Jews.
Jung's interest in European mythology and folk psychology was shared by the Nazis. Richard Noll describes Jung's own reaction to this connection:
   Jung clearly identifies himself with the spirit of German Volkstumsbewegung throughout this period and well into the 1920s and 1930s, until the horrors of Nazism finally compelled him to reframe these neopagan metaphors in a negative light in his 1936 essay on Wotan.
Various statements made by Jung in the 1930s have been cited as evidence of both contempt for Nazism and sympathy for Nazism. In the 1936 essay "Wotan", Jung described the influence of Adolf Hitler on Germany as "one man who is obviously 'possessed' has infected a whole nation to such an extent that everything is set in motion and has started rolling on its course towards perdition." He would later say, during a lengthy interview with H. R. Knickerbocker in October 1938:
   Hitler seemed like the 'double' of a real person, as if Hitler the man might be hiding inside like an appendix, and deliberately so concealed in order not to disturb the mechanism ... You know you could never talk to this man; because there is nobody there ... It is not an individual; it is an entire nation.
In an interview in 1949, Carl Jung said,
   It must be clear to anyone who has read any of my books that I have never been a Nazi sympathizer and I never have been anti-Semitic, and no amount of misquotation, mistranslation, or rearrangement of what I have written can alter the record of my true point of view. Nearly every one of these passages has been tampered with, either by malice or by ignorance. Furthermore, my friendly relations with a large group of Jewish colleagues and patients over a period of many years in itself disproves the charge of anti-Semitism.
Jung is also known to have possessed an interest in the Jewish mystic tradition of Kabbalah.

### Views on homosexuality

Jung addressed homosexuality in his published writings, in one comment specifying that homosexuality should not be a concern of legal authorities nor be considered a crime. He also stated that homosexuality does not reduce the value of a person as a member of society. Jung also said that homosexuality is a result of psychological immaturity ("nurture"), but only if one's sexuality is not an aspect of their constitutional characteristics ("nature").

### Psychedelics

Jung's theories are considered to be a useful therapeutic framework for the analysis of unconscious phenomena that become manifest in the acute psychedelic state. This view is based on correspondence Jung had with researchers involved in psychedelic research in the 1950s, as well as more recent neuroimaging research where subjects who are administered psychedelic compounds seem to have archetypal religious experiences of "unity" and "ego dissolution" associated with reduced activity in the default mode network.
This research has led to a re-evaluation of Jung's work, particularly the visions detailed in The Red Book, in the context of contemporary psychedelic, evolutionary, and developmental neuroscience. For example, in a chapter entitled "Integrating the Archaic and the Modern: The Red Book, Visual Cognitive Modalities and the Neuroscience of Altered States of Consciousness", in the 2020 volume Jung's Red Book for Our Time: Searching for Soul Under Postmodern Conditions, Volume 4, it is argued Jung was a pioneer who explored uncharted "cognitive domains" that are alien to Western modes of thought. While such domains of experience are not part of mainstream Western culture and thought, they are central to various Indigenous cultures that use psychedelics such as Iboga and Ayahuasca during rituals to alter consciousness. The author writes: "Jung seems to have been dealing with modes of consciousness alien to mainstream Western thought, exploring the terrain of uncharted cognitive domains. I argue that science is beginning to catch up with Jung who was a pioneer whose insights contribute a great deal to our emerging understanding of human consciousness." In this analysis, Jung's paintings of his visions in The Red Book were compared to the paintings of Ayahuasca visions by the Peruvian shaman Pablo Amaringo.
Commenting on research that was being undertaken during the 1950s, Jung wrote the following in a letter to Betty Eisner, a psychologist who was involved in LSD research at the University of California: "Experiments along the line of mescaline and related drugs are certainly most interesting since such drugs lay bare a level of the unconscious that is otherwise accessible only under peculiar psychic conditions. It is a fact that you get certain perceptions and experiences of things appearing either in mystical states or in the analysis of unconscious phenomena."
An account of Jung and psychedelics, as well as the importance of Jungian psychology to psychedelic-assisted therapies, is outlined in Scott Hill's 2013 book Confrontation with the Unconscious: Jungian Depth Psychology and Psychedelic Experience. A 2021 article discusses Jung's attitude towards psychedelics, as well as the applicability of his ideas to current research. As the author writes, Jung's "...legitimate reservations about the clinical use of psychedelics are no longer relevant as the field has progressed significantly, devising robust clinical and experimental protocols for psychedelic-assisted therapies. That said Jung's concept of individuation—that is the integration of the archaic unconscious with consciousness—seems extremely pertinent to modern psychedelic research." The author also uses work in evolutionary and psychedelic neuroscience, and specifically the latter's ability to make manifest ancient subcortical brain systems, to illuminate Jung's concept of an archaic collective unconscious that evolved before the ego complex and the uniquely human default mode network.

## Legacy

The Myers–Briggs Type Indicator (MBTI), a psychometric instrument mostly popular with non-psychologists, as well as the concepts of socionics, were developed from Jung's model of psychological types. The MBTI is considered pseudoscience and is not widely accepted by researchers in the field of psychology.
Jung is considered a "godparent" of the altruistic, mutual self-help movement, Alcoholics Anonymous. Jung told Rhode Island businessman and politician Rowland Hazard III, who had come under his care for the first time in 1926, that the only chance he might have to recover was through a "spiritual or religious experience" or "genuine conversion," which Hazard later had, through the Oxford Group and the Emmanuel Movement, and, according to some sources, never drank again.
Hazard, in turn, helped Ebby Thatcher, another alcoholic, get sober, with help from the Oxford Group. Thatcher brought Jung's ideas to a third alcoholic, Bill W., who consequently co-founded Alcoholics Anonymous with Dr. Bob. Years later, Bill W. corresponded with Jung, in 1961, thanking him for helping to inspire the organization. Of Hazard, the alcoholic who came under his care, Jung wrote: "His craving for alcohol was the equivalent, on a low level, of the spiritual thirst of our being for wholeness, expressed in medieval language: the union with God."
Jung concludes his letter to Bill W.:
"You see, "alcohol" in Latin is spiritus, and you use the same word for the highest religious experience as well as for the most depraving poison. The helpful formula therefore is: spiritus contra spiritum."
Jung saw the human psyche as "by nature religious" and made this idea a principal focus of his explorations. Jung is one of the best-known contemporary contributors to dream analysis and symbolization. His influence on popular psychology, the "psychologization of religion", spirituality, and the New Age movement has been immense. A Review of General Psychology survey, published in 2002, ranked Jung as the 23rd most cited psychologist of the 20th century. The list however focused on U.S. journals and was made by the psychology department of Arkansas State University.
Although psychoanalysis is still studied in the humanities, a 2008 study in The Journal of the American Psychoanalytic Association found that psychology departments and textbooks treat it as "desiccated and dead". Similarly, Alan Stone noted, "As academic psychology becomes more 'scientific' and psychiatry more biological, psychoanalysis is being brushed aside."
In a 2024 book-length reappraisal of Jung’s theories entitled Carl Jung and the Evolutionary Sciences: A New Vision for Analytical Psychology, it has been suggested that Jung was far ahead of his time in his evolutionary conception of the human mind. This thesis asserts that recent work in developmental biology, as well as experimental and psychedelic neuroscience, have provided empirical evidence that supports some of Jung’s central claims about the nature and evolution of consciousness. More specifically, trance states or altered states of consciousness (what Jung often referred to as the numinous) have become a central concern in contemporary neuroscientific investigation of the nature and origins of consciousness. In this sense, as an evolutionary theorist of the mind, Jung was far ahead of his own time. It was only during the first decades of the 21st Century, as scientists began investigating altered, trance, and psychedelic states, that Jung’s far-seeing and wide-ranging theories found increasing support from the empirically based mind sciences. In this sense, we can now appreciate how revolutionary and prescient Jung’s evolutionary conception of human psychology really was.