The legacy of Muhammad

From the very beginning of Islam, Muhammad had inculcated a sense of brotherhood and a bond of faith among his followers, both of which helped to develop among them a feeling of close relationship that was accentuated by their experiences of persecution as a nascent community in Mecca. The strong attachment to the tenets of the Qurʾānic revelation and the conspicuous socioeconomic content of Islamic religious practices cemented this bond of faith. In 622 ce, when the Prophet migrated to Medina, his preaching was soon accepted, and the community-state of Islam emerged. During this early period, Islam acquired its characteristic ethos as a religion uniting in itself both the spiritual and temporal aspects of life and seeking to regulate not only the individual’s relationship to God (through conscience) but human relationships in a social setting as well. Thus, there is not only an Islamic religious institution but also an Islamic law, state, and other institutions governing society. Not until the 20th century were the religious (private) and the secular (public) distinguished by some Muslim thinkers and separated formally in certain places such as Turkey.

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This dual religious and social character of Islam, expressing itself in one way as a religious community commissioned by God to bring its own value system to the world through the jihād (“exertion,” commonly translated as “holy war” or “holy struggle”), explains the astonishing success of the early generations of Muslims. Within a century after the Prophet’s death in 632 ce, they had brought a large part of the globe—from Spain across Central Asia to India—under a new Arab Muslim empire.

The period of Islamic conquests and empire building marks the first phase of the expansion of Islam as a religion. Islam’s essential egalitarianism within the community of the faithful and its official discrimination against the followers of other religions won rapid converts. Jews and Christians were assigned a special status as communities possessing scriptures and were called the “people of the Book” (ahl al-kitāb) and, therefore, were allowed religious autonomy. They were, however, required to pay a per capita tax called jizyah, as opposed to pagans, who were required to either accept Islam or die. The same status of the “people of the Book” was later extended in particular times and places to Zoroastrians and Hindus, but many “people of the Book” joined Islam in order to escape the disability of the jizyah. A much more massive expansion of Islam after the 12th century was inaugurated by the Sufis (Muslim mystics), who were mainly responsible for the spread of Islam in India, Central Asia, Turkey, and sub-Saharan Africa (see below).

Beside the jihad and Sufi missionary activity, another factor in the spread of Islam was the far-ranging influence of Muslim traders, who not only introduced Islam quite early to the Indian east coast and South India but also proved to be the main catalytic agents (beside the Sufis) in converting people to Islam in Indonesia, Malaya, and China. Islam was introduced to Indonesia in the 14th century, hardly having time to consolidate itself there politically before the region came under Dutch hegemony.

The vast variety of races and cultures embraced by Islam (an estimated total of more than 1.5 billion persons worldwide in the early 21st century) has produced important internal differences. All segments of Muslim society, however, are bound by a common faith and a sense of belonging to a single community. With the loss of political power during the period of Western colonialism in the 19th and 20th centuries, the concept of the Islamic community (ummah), instead of weakening, became stronger. The faith of Islam helped various Muslim peoples in their struggle to gain political freedom in the mid-20th century, and the unity of Islam contributed to later political solidarity.