In the Fourth Century the battle between Christianity and traditional religion in the Roman Empire reached its final stage. The stakes were the highest they had ever been, with control over the now ailing empire, and the populations therein, as the prize sought by both groups. Extensive scholarly work has been done on this conflict and the key characters, but I would like instead to focus on how it played out within a single illustrative issue, namely blood sacrifice. Blood sacrifice was one of the most contested battlegrounds in this religious conflict, appearing continuously in the philosophical and political rhetoric of the fourth century. The fact that this particular issue roused such passion and effort strongly suggests that it is ...