In the second century, Platonist and Judeo-Christian thought were sufficiently friendly that a Greek philosopher could declare, "What is Plato but Moses speaking Greek?" Four hundred years later, a Christian emperor had ended the public teaching of subversive Platonic thought. When and how did this philosophical rupture occur? Dylan M. Burns argues that the fundamental break occurred in Rome, ca. 263, in the circle of the great mystic Plotinus,...