Philosophical InvestigationsImmediately upon its posthumous publication in 1953, Ludwig Wittgenstein's Philosophical Investigations was hailed as a masterpiece, and the ensuing years have confirmed this initial assessment. Today it is widely acknowledged to be the single most important philosophical work of the twentieth century. In this definitive new en face German English edition, Wittgenstein experts Peter Hacker and Joachim Schulte have incorporated significant editorial