How clearly defined these or other considerations may have been in the mind of the outstanding Oriental of the seventh century, it would be presumptuous for a twentieth century Occidental to say; the fact remains, however, that such were the results attained. Brahminism, Buddhism and Confucianism waxed slowly great through renunciation, inertia and mystical contemplation; but Jehovah and Allah were made of sterner stuff. It seems probable that, despite the peaceful creed and practice of its founder, Christianity would never have become a serious rival of other world-faiths had it not been for the implacable swords of Constantine and Charlemagne; but Islam was fortunate from the beginning in that its inventor entertained no silly scruples about blood-letting. The Crusades, the French Revolution, and Cromwellian Puritanism were attended by an amount of sadism that may well make one pause before too severely condemning the blood-mania and sex-obsession that mark every stage of Islam’s triumphant progress. Thus it happened that, from December, 622, until October, 623, the Prophet sent six separate expeditions against the Meccan caravans. The first three were entirely unsuccessful, notwithstanding the fact that Mohammed presented the leader of each one with a white banner mounted on a staff; but the fourth, led by the Prophet himself, was marked by a momentous incident. Though he failed to capture his prey, he made some sort of offensive and defensive alliance with the idolatrous tribe of Banu Damrah; and, apparently lest he might be rightly criticized for making friends with unbelievers, he justified his action in the only acceptable way--by a revelation. “It may be that Allah will bring about friendship between you and those whom you hold to be your enemies.... Allah does not forbid you respecting those who have not made war against you on account of (your) religion, and have not driven you forth from your homes.... Allah only forbids you respecting those who made war against you on account of (your) religion, and drove you forth from your homes....” It may be surmised that the Prophet, himself an ex-camel-driver familiar with Bedouin ways, was moved to speak thus by two considerations: desert tribes that subsisted principally by plunder would be quick to appreciate the desirability of linking themselves with a faith that sanctified theft here and promised Paradise hereafter; besides, a successful assault on Koreish merchandise could hardly be made without the acquiescence or assistance of the tribes through whose territory that merchandise passed.