I.

Introduction

Sigmund Freud (1856-1939), Austrian physician, neurologist, and founder of psychoanalysis, who created an entirely new approach to the understanding of human personality. Through his skill as a scientist, physician, and writer, Freud combined ideas prevalent at the time with his own observation and study to produce a major theory of psychology. Most importantly, he applied these ideas to medical practice in the treatment of mental illness. His newly created psychotherapy treatments and procedures, many of which in modified form are applied today, were based on his understanding of unconscious thought processes and their relationship to neurotic symptoms (see Neurosis). Regarded with skepticism at the time, Freud’s ideas have waxed and waned in acceptance ever since. Nevertheless, he is regarded as one of the greatest creative minds of the 20th century.