the comparatively weak Byzantine Empire; its moderate economic resources and traditional organization sufficing to sustain it, despite intellectual decadence, till the age of Saracen greatness was over. Nor did their faith ever unify them save ostensibly for purposes of common warfare against the racial foe--a kind of union attained in all ages and with all varieties of religion. Fierce domestic strifes broke out as soon as the Prophet was dead. It would be as true to say that the common racial and military interest against the Græco-Roman and Persian States unified the Moslem parties, as that Islam unified the Arab tribes and factions. Apart from the inner circle of converts, indeed, the first conquerors were in mass not at all deeply devout, and many of them maintained to the end of their generation, and after his death, the unbelief which from the first met the Prophet at Mecca. [1025] Against the creed of Mohammed "the conservative and material instincts of the people of the desert rose in revolt; and although they became Moslems en masse, the majority of them neither believed in Islam nor knew what it meant. Often their motives were frankly utilitarian: they expected that Islam would bring them luck.... If things went ill, they blamed Islam and turned their backs on it." [1026] It is told of a Moslem chief of the early days that he said: "If there were a God, I would swear by his name that I did not believe in him." [1027] A general fanaticism grew up later. But had there been no Islam, enterprising Arabs would probably have overrun Syria and Persia and Africa and Spain all the same. [1028] Attila went further, and he is not known to have been a monotheist or a believer in Paradise. Nor were Jenghiz Khan and Tamerlane indebted to religious faith for their conquests.