**The Mass Psychology of Fascism** (German: *Die Massenpsychologie des Faschismus*) 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.

(Source: [Wikipedia](https://en.wikipedia.org/wiki/The_Mass_Psychology_of_Fascism))