The article presents the results of a research conducted in the archives of the historian Élie Halévy, one of the greatest of the 20th century. Comparing versions of files with posthumous editions, one finds that in the interwar debate, the author of Ère des tyrannies and Histoire du socialisme éuropée took on in his later papers and conferences, that the radicalization of democracy had an amazing skyline.
Tyranny; Democracy; Universal Freedom; Utopia; Socialism