This book focuses on the fascinating connection between Wittgenstein and Oswald Spengler and in particular the acknowledged influence of Spengler's Decline of the West. His book shows in meticulous detail how Spengler's dark conception of an ongoing cultural decline resonated deeply for Wittgenstein and influenced his later work. In so doing, the work takes into account discussions of these matters by major commentators such as Malcolm, Von Wright, Cavell, Winch, and Clack among others. A noteworthy feature of this book is its attempt to link Wittgenstein's cultural concerns with his views on religion and religious language. DeAngelis offers a fresh and original interpretation of the latter.