This chapter shows that the Investigations can plausibly be seen to represent a Spenglerian philosophy for a time of civilization and how some of the unique and characteristic goals and methods of the Investigations were influenced by Spengler. It explores some of Spengler's specific remarks in Decline about philosophy itself and especially philosophy in an age of civilization. These remarks offer a quite specific prescription, a fairly clear list of desiderata, for such a philosophy one that is both radical and distinctive. The chapter exhibit that some of Wittgenstein's explicitly stated philosophical goals are in accordance with this Spenglerian prescription. It presents that the character of Wittgenstein's approach to philosophical problems, his ways of addressing them in the Investigations, is in striking, unique accordance with that prescription. The chapter offers one final observation that has been noted that Spengler held the philosophical systems of the past in high regard.