The analytic tradition in twentieth century philosophy came out of what was known in Australia as the Cambridge School. It originated in the work of Moore, Broad and Russell, became associated with the Logical Positivists of the Vienna Circle, and emerged as mainstream philosophy in Ryle's Oxford and Quine's America. It was profoundly influenced by Wittgenstein, both early and late, though he was not part of it, and he was in turn stimulated by it, especially as it was manifested in Russell and through him Frege, and very differently in Moore.