It died not by murder, but by suicide; and that act of suicide was committed before the fifth century B.C. was out. It was not even the philosophies which preceded Christianity that were responsible for the death of the ancient Graeco-Roman civilization. The philosophies arose because the civic life of that civilization had already destroyed itself by turning itself into an idol to which men paid an exorbitant worship. And the rise of the philosophies, and the subsequent rise of the religions out of which Christianity emerged as the final successor of them all, was something that happened after the Graeco-Roman civilization had already put itself to death. The rise of the philosophies, and a fortiori that of the religions, was not a cause; it was a consequence.