At the beginning of the fifteenth century this Shîʿah found its political centre in Persia, and opposed itself fanatically to the Sultan of Turkey, who at about the same time came to stand at the head of orthodox Islâm. All differences of doctrine were now sharpened and embittered by political passion, and the efforts of single enlightened princes or scholars to induce the various peoples to extend to each other, across the political barriers, the hand of brotherhood in the principles of faith, all failed. It is only in the last few years that the general political distress of Islâm has inclined the estranged relatives towards reconciliation.
Besides the veneration of the Alids, orthodox Islâm has adopted another Shîʿitic element, the expectation of the Mahdî, which we have just mentioned. Most Sunnites expect that at the end of the world there will come from the House of Mohammed a successor to him, guided by Allah, who will maintain the revealed law as faithfully as the first four khalîfs did according to the idealized history, and who will succeed with God's help in making Islâm victorious over the whole world. That the chiliastic kingdom of the Mahdî must in the end be destroyed by Anti-Christ, in order that Jesus may be able once more to re-establish the holy order before the Resurrection, was a necessary consequence of the amalgamation of the political expectations formed under
