This is quite the most remarkable book I have ever read - utterly eccentric - zany even - yet in the end, if not 100% convincing, what amazes most is that it totally convincing in what really matters. The author's claim is that the key to understanding twentieth century history is what he calls "Wittgenstein's no-ownership theory of mind". This, he claims, is identical with what is known of early Indo-European (or "Aryan", as he misleadingly writes) religious doctrines about a common consciousness, such as one still finds in India. These, he says, are the key (via Schopenhauer) both to Wittgenstein's philosophy of language and to Hitler's power to move crowds with language. The book has convinced me that there really is a connection between the young Wittgenstein - with his hope of a "final solution" of the problems of philosophy and his schoolmate Hitler's own dream of a somewhat different "final solution". It is simply amazing that nearly 60 years after the war, we can face the possibility that the received version of twentieth century history and of Hitler's antisemitism might need, not revision at the edges, but total overhaul. This book opens up more than one entirely new field of research.