Overview

The expansion of the Arab Empire in the years following the Prophet Muhammad’s death led to the creation of caliphates occupying a vast geographical area. Conversion to Islam was boosted by missionary activities, particularly those of Imams, who easily intermingled with local populace to propagate religious teachings. These early caliphates, coupled with Muslim economics and trading and the later expansion of the Ottoman Empire, resulted in Islam’s spread outwards from Mecca towards both the Atlantic and Pacific oceans and the creation of the Muslim world. Trading played an important role in the spread of Islam in several parts of the world, notably southeast Asia.

Muslim dynasties were soon established and subsequent empires such as those of the Abbasids, Fatimids, Almoravids, Seljukids, and Ajurans, Adal and Warsangali in Somalia, Mughals in India, Safavids in Persia, and Ottomans in Anatolia were among the largest and most powerful in the world. The people of the Islamic world created numerous sophisticated centers of culture and science with far-reaching mercantile networks, travelers, scientists, hunters, mathematicians, doctors, and philosophers, all contributing to the Golden Age of Islam. Islamic expansion in South and East Asia fostered cosmopolitan and eclectic Muslim cultures in the Indian subcontinent, Malaysia, Indonesia, and China.

Within the first century of the establishment of Islam upon the Arabian Peninsula and the subsequent rapid expansion of the Arab Empire during the Muslim conquests, one of the most significant empires in world history was formed. For the subjects of this new empire, formerly subjects of the greatly reduced Byzantine and obliterated Sassanid empires, not much changed in practice. The objective of the conquests was of a practical nature more than anything else, as fertile land and water were scarce in the Arabian Peninsula. A real Islamization therefore only came about in the subsequent centuries.

Conversions to Islam

Historians distinguish between two separate strands of converts of the time. One is animists and polytheists of tribal societies of the Arabian Peninsula and the Fertile crescent; the other is the monotheistic populations of the Middle Eastern agrarian and urbanized societies.

For the polytheistic and pagan societies, apart from the religious and spiritual reasons each individual may have had, conversion to Islam “represented the response of a tribal, pastoral population to the need for a larger framework for political and economic integration, a more stable state, and a more imaginative and encompassing moral vision to cope with the problems of a tumultuous society.” In contrast, for sedentary and often already monotheistic societies, “Islam was substituted for a Byzantine or Sassanian political identity and for a Christian, Jewish or Zoroastrian religious affiliation.” Initially, conversion was neither required nor necessarily wished for: “[The Arab conquerors] did not require the conversion as much as the subordination of non-Muslim peoples. At the outset, they were hostile to conversions because new Muslims diluted the economic and status advantages of the Arabs.”

Only in subsequent centuries, with the development of the religious doctrine of Islam and with that the understanding of the Muslim Ummah, did mass conversion take place. The new understanding by the religious and political leadership led in many cases to a weakening or breakdown of the social and religious structures of parallel religious communities such as Christians and Jews. With the weakening of many churches, for example, and with the favoring of Islam and the migration of substantial Muslim Turkish populations into the areas of Anatolia and the Balkans, the “social and cultural relevance of Islam” were enhanced and a large number of peoples were converted.

During the Abbasid Caliphate, expansion ceased and the central disciplines of Islamic philosophy, theology, law, and mysticism became more widespread, and the gradual conversions of the populations within the empire occurred. Significant conversions also occurred beyond the extents of the empire, such as that of the Turkic tribes in Central Asia and peoples living in regions south of the Sahara in Africa through contact with Muslim traders active in the area and Sufi orders. In Africa it spread along three routes—across the Sahara via trading towns such as Timbuktu, up the Nile Valley through the Sudan up to Uganda, and across the Red Sea and down East Africa through settlements such as Mombasa and Zanzibar. These initial conversions were of a flexible nature.

The Arab-Muslim conquests followed a general pattern of nomadic conquests of settled regions, whereby conquering peoples became the new military elite and reached a compromise with the old elites by allowing them to retain local political, religious, and financial authority. Peasants, workers, and merchants paid taxes, while members of the old and new elites collected them.

The Great Mosque of Kairouan, founded in 670 CE by the Arab general and conqueror Uqba Ibn Nafi, is the oldest mosque in western Islamic lands and represents an architectural symbol of the spread of Islam in North Africa, situated in Kairouan, Tunisia.

Policy Toward Non-Muslims

The Arab conquerors did not repeat the mistake made by the Byzantine and Sasanian empires, who had tried and failed to impose an official religion on subject populations, which had caused resentments that made the Muslim conquests more acceptable to them. Instead, the rulers of the new empire generally respected the traditional middle-Eastern pattern of religious pluralism, which was not one of equality but rather of dominance by one group over the others. After the end of military operations, which involved the sacking of some monasteries and confiscation of Zoroastrian fire temples in Syria and Iraq, the early caliphate was characterized by religious tolerance, and people of all ethnicities and religions blended in public life. Before Muslims were ready to build mosques in Syria, they accepted Christian churches as holy places and shared them with local Christians. In Iraq and Egypt, Muslim authorities cooperated with Christian religious leaders. Numerous churches were repaired and new ones built during the Umayyad era.

Some non-Muslim populations did experience persecution, however. After the Muslim conquest of Persia, Zoroastrians were given dhimmi (non-Muslim) status and subjected to persecutions; discrimination and harassment began in the form of sparse violence. Zoroastrians were made to pay an extra tax called Jizya; if they failed, they were killed, enslaved, or imprisoned. Those paying Jizya were subjected to insults and humiliation by the tax collectors. Zoroastrians who were captured as slaves in wars were given their freedom if they converted to Islam.

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