At all events the Prophet expired without having named a successor, and the choice devolving on his companions dissension was ready to break out, when Omar, abandoning his own claims, gave his voice for Aboo Bekr. All opposition was thus silenced, and the father of Ayesha reigned for two years over the faithful. Ali at first refused obedience, but he finally acknowledged the successor of the Prophet. When dying, Aboo Bekr bequeathed the sceptre to Omar, as the worthiest, and when, twelve years afterwards, Omar perished by the dagger of an assassin, six electors conferred the vacant dignity on Othman, who had been the secretary of the Prophet. Age having enfeebled the powers of Othman, the reins of authority were slackened, and a spirit of discord pervaded all Arabia, illustrative of the Prophet's declaration of vigour being essential to a khalif. A numerous body of rebels besieged the aged Othman in Medina, and he was slain, holding the Koran in his lap, by a band of murderers, headed by the brother of Ayesha, who, the firebrand of Islam, it is probable had been secretly active in exciting the rebellion.

The popular choice now fell upon Ali, but the implacable Ayesha stimulated to revolt against his authority two powerful Arab chiefs, named Telha and Zobeir, who raised their standards in the province of Arabian Irak. Ayesha, mounted on a camel, appeared in the thickest of the battle, in which the rebel chiefs were defeated and slain. The generous Ali sent her to dwell at the tomb of the Prophet, where she passed in tranquillity the remainder of her days. The khalif himself was less fortunate. Moawiya, the Governor of Syria, son of Aboo Sofian, the most violent of the opponents of the Prophet, assumed the office of the avenger of Othman, whose death he charged on Ali and his party, and, declaring himself to be the rightful khalif, roused Syria to arms against the Prophet's son-in-law. In the war success was on the side of Ali, till the superstition of his troops obliged him to agree to a treaty; and shortly afterwards he was murdered by a fanatic in the mosk of Coofa. His son Hassan was induced by Moawiya to resign his claims and retire to the city of Medina; but his more high-spirited brother, Hussein, took arms against the khalif Yezid, the son of Moawiya; and the narrative of his death is one of the most pathetic and best related incidents of Oriental history[10]. The sisters and children of Hussein were spared by the clemency of the victorious Yezid, and from them descend a numerous race, glorying in the blood of Ali and the Prophet.

The Arabian empire was now of immense extent. Egypt, Syria, and Persia had been conquered in the reign of Omar. Under the first khalifs of the dynasty of the Ommiades (so called from Ommiyah, the great-grandfather of Moawiya), the conquest of Africa and Spain was achieved, and the later princes of this family ruled over the most extensive empire of the world.

The great schism of the Mohammedan church (we must be permitted to employ this term, the only one our language affords) commences with the accession of the house of Ommiyah. The Mohammedans have, as is generally known, been from that time to the present day divided into two great sects, the Soonees and the Sheähs, the orthodox and the dissenters, as we might venture to call them, whose opposite doctrines, like those of the Catholics and the Protestants of the Christian church, are each the established faith of great and independent nations. The Ottoman and the Usbeg Turks hold the Soonee faith; the Persians are violent Sheähs; and national and religious animosity concur in making them the determined and inveterate foes of each other.

The Soonees hold that the first four khalifs were all legitimate successors of the Prophet; but as their order was determined by their degree of sanctity, they assign the lowest rank to Ali. The Sheähs, on the contrary, maintain that the dignity of the Prophet rightfully descended to the son of his uncle and the husband of his daughter. They therefore regard Aboo Bekr, Omar, and Othman, as usurpers, and curse and revile their memory, more especially that of the rigid Omar, whose murderer they venerate as a saint. It must be steadily kept in mind, in every discussion respecting the Mohammedan religion, that Mohammed and his successors succeeded in establishing what the lofty and capacious mind of Gregory VII. attempted in vain—the union of the civil and ecclesiastical powers in the same person. Unlike the schisms of the eastern and western, of the Catholic and Protestant churches, which originated in difference of opinion on points of discipline or matters of doctrine, that of the Mohammedans arose solely from ambition and the struggle for temporal power. The sceptre of the greatest empire of the world was to be the reward of the party who could gain the greatest number of believers in his right to grasp the staff and ascend the pulpit of the Prophet of God. Afterwards, when the learning of the Greeks and the Persians became familiar to the Arabs, theological and metaphysical niceties and distinctions were introduced, and the two great stems of religion threw out numerous sectarian branches. The Soonees are divided into four main sects, all of which are, however, regarded as orthodox, for they agree in the main points, though they differ in subordinate ones. The division of the Sheähs is also into four sects, the point of agreement being the assertion of the right of Ali and his descendants to the imamat, or supreme ecclesiastical dignity; the point of difference being the nature of the proof on which his rights are founded, and the order of succession among his descendants. These four sects and their opinions are as follows:—

I. The first and most innocuous of the sects which maintained the rights of the family of Ali were the Keissanee, so named from Keissan, one of his freed-men. These, who were subdivided into several branches, held that Ali's rights descended, not to Hassan or Hussein, but to their brother, Mohammed-ben-Hanfee. One of these branch-sects maintained that the imamat remained[11] in the person of this Mohammed, who had never died, but had since appeared, from time to time, on earth, under various names. Another branch, named the Hashemites, held that the imamat descended from Mohammed-ben-Hanfee to his son Aboo-Hashem, who transmitted it to Mohammed, of the family of Abbas, from whom it descended to Saffah, the founder of the Abbasside dynasty of khalifs[12]. It is quite evident that the object of this sect was to give a colour to the claims of the family of Abbas, who stigmatized the family of Ommiyah as usurpers, and insisted that the khalifat belonged of right to themselves. Aboo-Moslem, the great general who first gave dominion to the family of Abbas, was a real or pretended maintainer of the tenets of this sect, the only branch, by the way, of the Sheähs which supported the house of Abbas.

II. A second branch of the Sheähs was named Zeidites. These held that the imamat descended through Hassan and Hussein to Zein-al-Abedeen, the son of this last, and thence passed to Zeid (whence their name), the son of Zein; whereas most other Sheähs regarded Mohammed Bakir, the brother of Zeid, as the lawful imam. The Zeidites differed from the other Sheähs in acknowledging the three first khalifs to have been legitimate successors of the Prophet. Edris, who wrested a part of Africa from the Abbasside khalifs, and founded the kingdom of Fez, was a real or pretended descendant of Zeid.

III. The Ghoollat (Ultras), so named from the extravagance of their doctrines, which, passing all bounds of common sense, were held in equal abomination by the other Sheähs and by the Soonees. This sect is said to have existed as early as the time of Ali himself, who is related to have burnt some of them on account of their impious and extravagant opinions. They held, as we are told, that there was but one imam, and they ascribed the qualities of divinity to Ali. Some maintained that there were two natures (the divine and the human) in him, others that the last alone was his. Some again said that this perfect nature of Ali passed by transmigration through his descendants, and would continue so to do till the end of all things; others that the transmission stopped with Mohammed Bakir, the son of Zein-al-Abedeen, who still abode on earth, but unseen, like Khizer, the Guardian of the Well of Life, according to the beautiful eastern legend[13]. Others, still more bold, denied the transmission, and asserted that the divine Ali sat enthroned in the clouds, where the thunder was the voice and the lightning the scourge wherewith he terrified and chastised the wicked. This sect presents the first (though a very early) instance of the introduction into Islam of that mysticism which appears to have had its original birth-place in the dreamy groves of India. As a political party the Ghoollat never seem to have been formidable.

IV. Such, however, was not the case with the Imamee, the most dangerous enemies of the house of Abbas. Agreeing with the Ghoollat in the doctrine of an invisible imam, they maintained that there had been a series of visible imams antecedent to him, who had vanished. One branch of this sect (thence called the Seveners—Sebiïn) closed the series with Ismaïl, the grandson of Mohammed Bakir, the seventh imam, reckoning Ali himself the first. These were also called Ismaïlites, from Ismaïl. The other branch, called Imamites, continued the series from Ismaïl, through his brother Moosa Casim, down to Askeree, the twelfth imam. These were hence called the Twelvers (Esnaashree). They believed that the imam Askeree had vanished in a cavern at Hilla, on the banks of the Euphrates, where he would remain invisible till the end of the world, when he would again appear under the name of the Guide (Mehdee) to lead mankind into the truth. The Imamee, wherever they might stop in the series of the visible imams, saw that, for their political purposes, it was necessary to acknowledge a kind of locum tenentes imams; but, while the Zeidites, who agreed with them in this point, required in these princes the royal virtues of valour, generosity, justice, knowledge, the Imamee declared themselves satisfied if they possessed the saintly ones of the practice of prayer, fasting, and alms-giving. Hence artful and ambitious men could set up any puppet who was said to be descended from the last of the visible imams, and aspire to govern the Mohammedan world in his name.

The Twelvers were very near obtaining possession of the khalifat in the time of the first Abbassides; for the celebrated Haroon Er-Rasheed's son, Al-Mamoon, the eighth khalif of that house, moved either by the strength or preponderance which the Sheäh party had arrived at, or, as the eastern historians tell us, yielding to the suggestions of his vizir, who was devoted to that sect, named Ali Riza, the eighth imam, to be his successor on the throne. He even laid aside the black habiliments peculiar to his family, and wore green, the colour of Ali and the Prophet. But the family of Abbas, which now numbered 30,000 persons, refused their assent to this renunciation of the rights of their line. They rose in arms, and proclaimed as khalif Al-Mamoon's uncle Ibrahim. The obnoxious vizir perished, and the opportune death of Ali Riza (by poison, as was said) relieved the son of Haroon Er-Rasheed from embarrassment. Ali Riza was interred at Meshed, in the province of Khorasan; and his tomb is, to the present day, a place of pilgrimage for devout Persians[14].