Historian, essayist, professor at the University of Nantes.
A resistant during World War II, he was imprisoned for two years in Buchenwald, Harzungen and Bergen-Belsen.
In his book "Oui, il faut parler des négationnistes : Roques, Faurisson, Garaudy et les autres (1997), he provided testimony against holocaust deniers Henri Roques, Robert Faurisson and Roger Garaudy, among others.