Sigmund Freud was born in Moravia. When he was three years old, his family moved to Vienna, the city where he was to live until the last year of his life. At the age of 17, Freud entered the University of Vienna's medical school, where he pursued a variety of research interests. Although primarily interested in physiological research, Freud was forced to enter into clinical practice due to the difficulty of obtaining a university appointment--aggravated, in his case, by anti-Semitic attitudes and policies. After additional independent research and clinical work at the General Hospital of Vienna, Freud entered private practice, specializing in the treatment of patients with neurological and hysterical disorders.

During this period, Freud learned about his colleague Josef Breuer's "cathartic" treatment of hysterical symptoms, which disappeared when a patient recalled traumatic experiences while under hypnosis and was able to express original emotions that had been repressed and...