This volume addresses the means and ends of sacrificial speculation by inviting a selected group of specialist in the fields of philosophy, history of religions, and indology to examine philosophical modes of sacrificial speculation — especially in Ancient India and Greece — and consider the commonalities of their historical raison d’être. Scholars have long observed, yet without presenting any transcultural grand theory on the matter, that sacrifice seems to end with (or even continue as) philosophy in both Ancient India and Greece. How are we to understand this important transformation that so profoundly changed the way we think of religion (and philosophy as opposed to religion) today? Some of the complex topics inviting closer examination in this regard are the interiorisation of ritual, ascetism and self-sacrifice, sacrifice and cosmogony, the figure of the philosopher-sage, transformations and technologies of the self, analogical reasoning, the philosophy of ritual, vegetarianism, and metempsychosis.