Wilhelm Reich was an Austrian doctor of medicine and a psychoanalyst, a member of the second generation of analysts after Sigmund Freud. The author of several influential books, The Impulsive Character (1925), The Function of the Orgasm (1927), Character Analysis (1933), and The Mass Psychology of Fascism (1933), he became one of the most radical figures in the history of psychiatry.

The Mass Psychology of Fascism is a 1933 psychology book written by the Austrian psychoanalyst and psychiatrist Wilhelm Reich, in which the author attempts to explain how fascists and authoritarians come into power through their political and ideologically-oriented sexual repression on the popular masses.