One could say that in 2012 the scientific study of religion, particularly in its anthropological form, has become one hundred years old. In 1912, Durkheim published The Elementary Forms of Religious Life, perhaps the most influential book in the social study of religion, and certainly in the anthropology of religion, of the entire twentieth century. But this was not the only seminal work published around a century ago. A little earlier than that, in 1909, Arnold van Gennep’s Les rites de passage inaugurated an interest in liminality and ritual that has accompanied our discipline ever since. That same year, Marcel Mauss wrote La prière, an unfinished thesis that started an equally unfinished interest in prayer, one of the central devotional practices in many religions across the globe. In 1910, Lévy-Bruhl published his first explicitly anthropological book, How Natives Think, a problematic ancestor of a debate about rationality and modes of thought that has accompanied anthropology and philosophy ever since. In 1913, Freud tackled the then fashionable topic of totemism in his Totem and Taboo. Around those early years of the century, too, Max Weber was starting to write about charisma, secularization, and rationalization, topics of enduring interest.