Islam "Islam is a religion adapted to Orientals, especially Arabs, i.e., on one hand to townsmen engaged in trade and industry, on the other to nomadic Bedouins. Therein lies, however, the embryo of a periodically recurring collision. The townspeople grow rich, luxurious and lax in the observation of the "law." The Bedouins, poor and hence of strict morals, contemplate with envy and covetousness these riches and pleasures. Then they unite under a prophet, a Mahdi, to chastise the a postates and restore the observation of the ritual and the true faith and to appropriate in recompense the treasures of the renegades. In a hundred years they are naturally in the same position as the renegades were: a new purge of the faith is required, a new Mahdi arises and the game starts again from the beginning. That is what happened from the conquest campaigns of the African Almoravids and Almohads in Spain to the last Mahdi of Khartoum who so successfully thwarted the E