Ludwig Wittgenstein (1889-1951) Life and Works . . Picture Theory . . Fact and Value . . New Methods . . Language Games . . Private Language Bibliography Internet Sources Raised in a prominent Viennese family, Ludwig Wittgenstein studied engineering in Germany and England, but became interested in the foundations of mathematics and pursued philosophical studies with Moore at Cambridge before entering the Austrian army during World War I. The notebooks he kept as a soldier became the basis for his Tractatus, which later earned him a doctorate and exerted a lasting influence on the philosophers of the Vienna circle. After giving away his inherited fortune, working as a village schoolteacher in Austria, and designing his sister's Vienna home, Wittgenstein returned to Cambridge, where he developed a new conception of the philosophical task. His impassioned teaching during this period influenced a new generation of philosophers, who tried to capture it in The Blue and Brown Books (dictated 1933-35). From the late 'thirties, Wittgenstein himself began writing the materials which would be published only after his death. In the cryptic Logische-Philosophische Abhandlung (Tractatus Logico-Philosophicus) (1922),