"Produced by religious intolerance, political fanaticism, or social resentment, denunciation is a modern democratic practice too long neglected by historians. This fascinating book, written by excellent specialists, establishes a first inventory of this practice, leading the reader through the revolutionary and counter-revolutionary cultures of the last two centuries."—Francois Furet "This is a fascinating and highly original exploration of a familiar, though poorly understood, phenomenon of modern societies in general and totalitarian systems in particular. From the French Revolution to the NKVD, Gestapo, and Stasi, denunciation is analyzed both as a function of political surveillance and as deeply rooted in the social practices of community and the workplace. The book represents a refreshing amalgam of deeply archival research and theoretical rigor."—Norman M. Naimark, Stanford University