Illuminating and authoritative, this dictionary encompasses all aspects of Western philosophy from 600 BC to the present day. Extensive and up-to-date coverage of modern as well as historical fields, with clear and concise definitions of the key concepts, doctrines and schools of thought of all areas of philosophy, numerous entries on major as well as less well-known philosophers, from Socrates, Plato, Aristotle, Thomas Aquinas, Leibniz and Rousseau, through to philosophers of the modern day, such as Davidson, Derrida, Habermas and Quine, philosophical self-portraits by a number of eminent contemporary figures in the field, including Isaiah Berlin, Alasdair MacIntyre, Richard Rorty, John Searle and Peter Singer, information on the pronunciation of philosophers' names, and on the origin and pronunciation of technical terms.