Phil in SF commented on The Anatomy of Fascism by Robert O. Paxton
Chapter 3 examines how fascisms changed from their original programs to gain power. In particular, Paxton notes that Mussolini was pro League of Nations, anti professional military, anti Catholic, pro nationalization of industry and anti capitalist in 1919. By 1922, he'd reversed course on those issues. This was how Italian fascism became successful (according to Paxton).