From Wikipedia:

Carl Gustav Jung (/jʊŋ/;[3] German: [jʊŋ]; 26 July 1875 – 6 June 1961) was a Swiss psychiatrist and psychoanalystwho founded analytical psychology.

Jung’s work was influential in the fields of psychiatry, anthropology, archaeology, literature, philosophy, and religious studies. Jung worked as a research scientist at the famous Burghölzli hospital, under Eugen Bleuler. During this time, he came to the attention of the Viennese founder of psychoanalysisSigmund Freud. The two men conducted a lengthy correspondence and collaborated, for a while, on a joint vision of human psychology.

Freud saw in the younger Jung the potential heir he had been seeking to carry on his “new science” of psychoanalysis. Jung’s research and personal vision, however, made it impossible for him to bend to his older colleague’s doctrine, and a schism became inevitable. This division was personally painful for Jung, and it was to have historic repercussions lasting well into the modern day.

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 synchronicityarchetypal phenomena, the collective unconscious, the psychological complex, and extraversion and introversion.

Jung was also an artist, craftsman and builder as well as a prolific writer. Many of his works were not published until after his death and some are still awaiting publication.