Frédéric Rousseau is a French historian, specializing in the social history of soldiers in World War I. He is notable as one of the first historians to discussion the suppression of sexuality in combatants, and early use of the term and view "demodernization" (2000). He teaches at the University of Montpellier, and is a director of Laboratoire CRISES (or Centre de recherches interdisciplinaires en sciences humaines et sociales).