John Stuart Mill and British empiricism materialism, naturalism and agnosticism towards the absolute personality and the absolute pragmatism and its European analogues new developments in logic the movement towards objectivity Moore and Russell Cook Wilson and Oxford philosophy the new realists critical realism and American naturalism recalcitrant metaphysicians natural scientists turn philosophers some Cambridge philosophers and Wittgenstein's Tractatus logical positivism logic, semantics and methodology Wittgenstein and ordinary language philosophy existentialism and phenomenology description, explanation or revision?