Hitler's anti-Semitism involved a projection of the young Wittgenstein's traits onto the whole Jewish people. Wittgenstein did have three Jewish grandparents but Wittgenstein himself, and his mother and father, were Roman Catholics. The Cambridge Five Cornish also argues that Wittgenstein is the most likely suspect as recruiter of the "Cambridge Five" spy ring. The author suggests that Wittgenstein was responsible for British decryption technology for the German Enigma code reaching the Red Army and that he thereby enabled the Red Army victories on the Eastern Front that liberated the camps and ultimately overthrew the Reich. He writes that the Soviet government offered Wittgenstein the chair in philosophy at what had been Lenin's university (Kazan) at a time (during the Great Purge) when ideological conformity was at a premium amongst Soviet academics and enforced by the very harshest penalties. Wittgenstein wanted to emigrate to Russia, first in the twenties, as he wrote in a letter to Paul Engelmann, and again in the thirties, either to work as a labourer or as a philosophy lecturer. Cornish argues that given the nature of the Soviet regime, the possibility that a non-Marxist philosopher (or even one over whom the government could exert no ideological control) would be offered such a post, is unlikely in the extreme. No-ownership theory of mind Other sections of the book deal with Cornish's theories about what he claims are the common roots of Wittgenstein's and Hitler's philosophies in mysticism, magic, and the "no-ownership" theory of mind. Cornish sees this as Wittgenstein's generalisation of Arthur Schopenhauer's account of the Unity of the Will, in which despite appearances, there is only a single Will acting through the bodies of all creatures. This doctrine, generalized to other mental faculties such as thinking, is presented in Ralph Waldo Emerson's "Essays". The doctrine, writes Cornish, was also held by the Oxford philosopher R. G. Collingwood who was one of Wittgenstein's electors to his Cambridge chair. Cornish tries to tie this to Wittgenstein's arguments against the idea of "mental privacy" and in conclusion says "I have attempted to locate the source of the Holocaust in a perversion of early Aryan religious doctrines about the ultimate nature of man". Cornish also suggests that Hitler's oratorical powers in addressing the group mind of crowds and Wittgenstein's philosophy of language and denial of mental privacy, are the practical and theoretical consequences of this doctrine. Reception The book proved