Mass Psychology (Book)

Psychologie des Foules, written by French sociologist and psychologist Gustave Le Bon in 1895, is a seminal work that examines the behavior of individuals within crowds and the psychological dynamics underlying such behavior. Le Bon argues that individual behavior within a crowd differs significantly from behavior exhibited when individuals are alone. In the work, crowd psychology is analyzed through concepts such as the influence of unconscious processes, suggestion, imitation, and emotional responses. Le Bon supports his analyses with historical examples.

According to Le Bon, a psychological crowd is a group formed when individuals from different nations, professions, or genders unite around a common impulse. This group represents not merely a physical aggregation but a collective state of consciousness arising under specific psychological conditions. Within the crowd, individual traits and intellectual tendencies weaken, while unconscious impulses come to the fore. This phenomenon is explained by the “law of mental unity,” which describes the tendency of individuals in a crowd to behave similarly. Le Bon contends that a crowd exhibits a structure in which mechanisms of self-control are weakened, the sense of personal responsibility diminishes, and behaviors spread easily. In this structure, individuals subsume their personal interests and participate in collective behavior. Le Bon describes this process as analogous to hypnosis: within the crowd, the conscious aspect of the individual recedes into the background, while willpower and self-awareness weaken.

Psychologie des Foules is structured to provide a detailed examination of the psychological characteristics, beliefs, and behaviors of crowds. The early sections explain the formation of crowds and the distinctive features of collective mentality, while the second section analyzes the factors that shape crowd beliefs and opinions.

Le Bon asserts that he employs an observational scientific method in his work and presents an objective analysis free from influence by ideas, theories, or doctrines. He examines crowd behavior through the interplay of individuals’ hereditary traits and the dynamic, context-dependent nature of crowd psychology. The book offers a framework for understanding the effects of irrational crowd actions and the emergence of “herd psychology” during the transition from individual to collective behavior. Historical events such as the French Revolution are cited with footnotes to illustrate the psychological dynamics of crowds.