Berbers and the Islamic invasion
Unlike the invasions of previous religions and cultures, the coming of Islam, which was spread by Arabs, was to have pervasive and long-lasting effects on the Maghrib. The new faith, in its various forms, would penetrate nearly all segments of society, bringing with it armies, learned men, and fervent mystics, and in large part replacing tribal practices and loyalties with new social norms and political idioms.
Nonetheless, the Islamization and Arabization of the region were complicated and lengthy processes. Whereas nomadic Berbers were quick to convert and assist the Arab invaders, not until the twelfth century under the Almohad Dynasty did the Christian and Jewish communities become totally marginalized.
The first Arab military expeditions into the Maghrib, between 642 and 669, resulted in the spread of Islam. These early forays from a base in Egypt occurred under local initiative rather than under orders from the central caliphate. When the seat of the caliphate moved from Medina to Damascus, however, the Umayyads (a Muslim dynasty ruling from 661 to 750) recognized that the strategic necessity of dominating the Mediterranean dictated a concerted military effort on the North African front. In 670, therefore, an Arab army under Uqba ibn Nafi established the town of Al Qayrawan about 160 kilometers south of present-day Tunis and used it as a base for further operations.
Abu al Muhajir Dinar, Uqba's successor, pushed westward into Algeria and eventually worked out a modus vivendi with Kusayla, the ruler of an extensive confederation of Christian Berbers. Kusayla, who had been based in Tilimsan (Tlemcen), became a Muslim and moved his headquarters to Takirwan, near Al Qayrawan.
This harmony was short-lived, however. Arab and Berber forces controlled the region in turn until 697. By 711 Umayyad forces helped by Berber converts to Islam had conquered all of North Africa. Governors appointed by the Umayyad caliphs ruled from Al Qayrawan, capital the new wilaya (province) of Ifriqiya, which covered Tripolitania (the western part of present-day Libya), Tunisia, and eastern Algeria.
Paradoxically, the spread of Islam among the Berbers did not guarantee their support for the Arab-dominated caliphate. The ruling Arabs alienated the Berbers by taxing them heavily; treating converts as second-class Muslims; and, at worst, by enslaving them. As a result, widespread opposition took the form of open revolt in 739-40 under the banner of Kharijite Islam. The Kharijites objected to Ali, the fourth caliph, making peace with the Umayyads in 657 and left Ali's camp (khariji means "those who leave"). The Kharijites had been fighting Umayyad rule in the East, and many Berbers were attracted by the sect's egalitarian precepts. For example, according to Kharijism, any suitable Muslim candidate could be elected caliph without regard to race, station, or descent from the Prophet Muhammad.
After the revolt, Kharijites established a number of theocratic tribal kingdoms, most of which had short and troubled histories. Others, however, like Sijilmasa and Tilimsan, which straddled the principal trade routes, proved more viable and prospered. In 750 the Abbasids, who succeeded the Umayyads as Muslim rulers, moved the caliphate to Baghdad and reestablished caliphal authority in Ifriqiya, appointing Ibrahim ibn al Aghlab as governor in Al Qayrawan. Although nominally serving at the caliph's pleasure, Al Aghlab and his successors, the Aghlabids, ruled independently until 909, presiding over a court that became a center for learning and culture.
Just to the west of Aghlabid lands, Abd ar Rahman ibn Rustam ruled most of the central Maghrib from Tahert, southwest of Algiers. The rulers of the Rustamid imamate, which lasted from 761 to 909, each an Ibadi Kharijite imam, were elected by leading citizens. The imams gained a reputation for honesty, piety, and justice. The court at Tahert was noted for its support of scholarship in mathematics, astronomy, and astrology, as well as theology and law. The Rustamid imams, however, failed, by choice or by neglect, to organize a reliable standing army. This important factor, accompanied by the dynasty's eventual collapse into decadence, opened the way for Tahert's demise under the assault of the Fatimids.
