Michel Foucault observed that “the birth of philology attracted far less notice in the Western mind than did the birth of biology or political economy.” In this penetrating exploration of the origin of the discipline, Maurice Olender shows that philology left an indelible mark on Western visions of history and contributed directly to some of the most horrifying ideologies of the twentieth century. The comparative study of languages was inspired by Renaissance debates over what language was spoken in the Garden of Eden. By the eighteenth century scholars were persuaded that European languages shared a common ancestor. With the adoption of positivist, “scientific” methods in the nineteenth century, the hunt for the language of Eden and the search for a European Ursprache diverged. Yet the desire to reconcile historical causality with divine purpose remained. Because the Indo-European languages clearly had a separate line of descent from the biblical tongues, the practitioners of the new