During his lifetime, the late Hilberg was generally recognized as the foremost orthodox expert on the Holocaust. His main work, The Destruction of the European Jews, was first criticized by French revisionist Paul Rassinier. Several other revisionists followed Rassinier’s example. Hilberg took on the revisionist challenge during the first Zündel Trial in Canada in 1985, when he appeared as an expert witness for the prosecution. For the second trial in 1988 he chickened out, though, and was replaced by Christopher Browning.