Crowd, or group, psychology draws on ideas about psychiatry, the mind, pathology, etc. It focuses on how groups behave under specific influences.
Key point 2
Freud’s experiences in the early 20th century and his position as the leader of the psychoanalytic movement led him to write Group Psychology and the Analysis of the Ego, a landmark text on group psychology.
Key point 3
During the World Wars, several physicians, including Wilfred Bion, developed Freud’s theory of group psychology and the practice of group therapy.