On its first appearance in 1960, J.O. Urmson's Concise encyclopedia of Western philosophy and philosophersestablished itself as a classic. Its contributors included many of the leading philosophers of the English-speaking world: Ryle, Hare, Strawson, Ayer, Dummett, Williams and many others. They wrote with an authority and individuality which made the Encyclopediainto a lively and engaging introduction to philosophy as well as a convenient reference work. For this edition, supervised by Jonathan Rée, the original articles have been revised and updated, and eighty articles by thirty one new authors have been added. The additions take account of recent developments in philosophy, of literary, historical and political issues in philosophy, and of developments in continental thought, including in Marxism, psychoanalysis, phenomenology, existentialism, structuralism, post-structuralism and deconstruction. There is a clear, integral cross-referencing system which allows the reader to identify points of overlap between philosophical traditions and their personalities at a glance.