This award-winning book investigates the critique of psychoanalysis formulated by the psychiatrist and philosopher Karl Jaspers (1883-1969) over some five decades, systematically examining Jasper's arguments against Freud and his followers. The book traces the medico-historical roots of Jasper's criticism of psychoanalysis and places it within the framework of scientific theory before devoting itself extensively to medico-ethical aspects of the controversy, which are ultimately treated in terms of a history of mentalities.