"You perceive," he said, "that you have made continual progress. Cain did his murder with a club; the Hebrews did their murders with javelins and swords; the Greeks and Romans added protective armor and the fine arts of military organization and generalship; the Christian has added guns and gun' powder; a few centuries from now he will have so greatly improved the deadly effectiveness of his weapons of slaughter that all men will confess that without Christian civilization war must have remained a poor and trifling thing to the end of time."