In 1945, with the second world war won bar the shouting, Bertrand Russell polished off his brief examination of Friedrich Nietzsche’s contribution to Western thought with the splendid phrase: ‘His followers have had their innings.’ Russell knew that Nietzsche’s followers didn’t just mean the Nazis. Ten years before Hitler’s acolytes started editing special volumes of Nietzsche’s aphorisms about the Will to Power, the Blond Beast and suchlike, Leon Trotsky declared that ‘the Nietzscheans’ were his natural allies in the creation of the socialist ‘superman’.