Carl Gustav Jung, the originator of analytical psychology, was born in Kesswil, Switzerland, studied medicine in Basel, and then became an assistant in psychiatry at Zürich, interrupting his stay there to visit and study under Pierre Janet in Paris. He was a pupil of Eugen Bleuler, and he became Sigmund Freud's friend and collaborator for a few years, after having been influenced by his writings. He became the first president of the International Psychoanalytic Society in 1911. In 1914 he broke with Freud, founding his own school of analytical psychology. His earlier studies of association tests and of dementia praecox were followed by an attempt to classify types of personality and by the gradual development not only of a theory of the collective unconscious but also of the implications of that theory for the study of culture and especially for the study of...