[3] In addition to his duties at the Sorbonne, he is also a member of the editorial board of the Revue française de science politique.
In 2003, he published an important collective work on these questions entitled The Myth of French Allergy to Fascism, in which several specialists also contributed, such as Bruno Goyet, Didier Leschi, Gisèle Sapiro, Annie Collovald, Robert O. Paxton, Violaine Roussel, Zeev Sternhell and Brian Jenkins.
Specializing in the analysis of political crises, revolutions and democratic transitions, we owe him the concepts of "fluid political conjuncture" or "collusive transactions" which submits another analysis of legitimacy.
[6][7] The myth of the French allergy to fascism published in 2003 under his direction intends to take the opposite view of historians such as René Rémond, Serge Bernstein, Pierre Milza, Michel Winock, Philippe Burrin, who are said to have developed what he calls an "immune thesis" with regard to fascism in France, namely the idea that French society is impervious to fascism, from made the history of the rights in this country.
In the review of this book, Jean-Paul Thomas deplores "his ignorance of recent research which has renewed knowledge of the French right".