At the turn of the last century C. G. Jung began his career as a psychiatrist. During the next decade three men whose names are famous in the annals of medical psychology influenced his professional development: Pierre Janet, under whom he studied at the Salpetriere Hospital in Paris; Eugen Bleuler, his chief at the Burgholzli Hospital in Zurich; and Sigmund Freud, with whom Jung began corresponding in 1906. It is Bleuler, and to a lesser extent Janet,...