Paul Broca (1824-1880) was the pioneer of modern brain surgery and physical anthropology. "In the era of the cognitive sciences," writes J.P. Changeux, "Broca appears as a founding father. Through its vivacity, its freshness, its incomparable concern for exactness and the generality of its views, this text by Francis Schiller will appeal to the general public, but at the same time will convince the specialist. An important work."