Updated edition of this important book, charting the development of Wittgenstein's philosophy of the mind, language, logic, and mathematics.

A newly reorganized, up-to-date overview of key reference works in philosophy, reflects a veritable explosion of reference sources, both print and online, publi

Ludwig Wittgenstein (1889–1951) is one of the most important, influential, and often-cited philosophers of the twentieth century, yet he remains one of its mo