Gustave Le Bon (1841–1931) was a French social psychologist, sociologist, and polymath known for his pioneering work in crowd psychology. Born in Nogent-le-Rotrou, France, Le Bon studied medicine but became renowned for his interdisciplinary writings on sociology, anthropology, and psychology.

Le Bon’s influential works, including The Crowd, explored human behavior, leadership, and the dynamics of social change. His ideas have influenced fields ranging from political science to marketing and have been cited by figures such as Sigmund Freud and Benito Mussolini. Le Bon’s keen observations on group behavior continue to provide valuable insights into societal dynamics.