Three hundred and thirty years had passed since the Saracens first invaded the valley of the Nile. The people, with traditional docility, had liberally adopted the religion of their rulers, and the Moslems now formed the great majority of the population. Arabs and natives had blended into much the same race that we now call Egyptians; but so far the mixture had not produced any conspicuous men. The few commanding figures among the governors, Ibn-Tulun, the Ikshid, Kafur, were foreigners, and even these were but a step above the stereotyped official. They essayed no great extension of their dominions; they did not try to extinguish their dangerous neighbors the schismatic Fatimites; and though they possessed and used fleets, they ventured upon no excursions against Europe. The great revolution which had swept over North Africa, and now spread to Egypt, arose out of the old controversy over the legitimacy of the caliphate. The prophet Mahomet died without definitely naming a successor, and thereby bequeathed an interminable quarrel to his followers. The principle of election, thus introduced, raised the first three caliphs, Abu-Bekr, Omar, Othman, to the _cathedra_ at Medina; but a strong minority held that the "divine right" rested with Ali, the "Lion of God," first convert to Islam, husband of the prophet's daughter Fatima, and father of Mahomet's only male descendants. When Ali in turn became the fourth caliph, he was the mark for jealousy, intrigue, and at length assassination; his sons, the grandsons of the Prophet, were excluded from the succession; his family were cruelly persecuted by their successful rivals, the Ommiad usurpers; and the tragedy of Kerbela and the murder of Hoseyn set the seal of martyrdom on the holy family and stirred a passionate enthusiasm which still rouses intense excitement in the annual representations of the Persian passion play. The rent thus opened in Islam was never closed. The ostracism of Ali "laid the foundation of the grand interminable schism which has divided the Mahometan Church, and equally destroyed the practice of charity among the members of their common creed and endangered the speculative truths of doctrine."