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Oswald Spengler (born May 29, 1880, Blankenburg, Germany—died May 8, 1936, Munich) was a German philosopher whose reputation rests entirely on his influential study Der Untergang des Abendlandes, 2 vol. (1918–22; The Decline of the West), a major contribution to social theory. After taking his doctorate at the University of Halle (1904), Spengler worked as a schoolmaster until 1911, when he went to live in Munich on a small inheritance and began work on Der...