Death of Muhammad

The death of the Prophet Muhammad in 632 AD, in the city of Medina, ended the life of the man who had founded Islam and united much of the Arabian Peninsula under a single political and religious community. It also raised a question he left unresolved in any way all Muslims accept: who should lead the community after him? The disagreement over that question became the root of the division between Sunni and Shia Islam, which still shapes the religious and political landscape of the Muslim world.

Muhammad was born in Mecca around 570 and began, around 610, to proclaim the revelations that Muslims hold to be the word of God. Facing hostility from Mecca's ruling clans, he and his followers migrated in 622 to Medina, an event known as the Hijra, which marks the start of the Islamic calendar. In Medina he became a religious teacher, political arbiter, and military leader. Over the following decade, through alliances, warfare, and diplomacy, he brought Mecca into the fold and secured the allegiance of many tribes across Arabia.

According to traditional accounts, Muhammad fell ill in 632 after returning from his final pilgrimage to Mecca, and he died in Medina, reportedly in the house of his wife Aisha. He left no surviving sons, and the sources disagree on whether he clearly designated a successor. His death stunned many followers and threatened to unravel the new alliances, since some tribes saw their loyalty as tied to him personally.

A group of prominent Medinans and Meccan emigrants gathered to decide the matter, and Abu Bakr, one of Muhammad's earliest companions and the father of Aisha, was chosen as the first caliph, meaning "successor." Others held that Muhammad had indicated his cousin and son-in-law Ali ibn Abi Talib, husband of his daughter Fatima, as his rightful heir. Those who accepted the early caliphs' leadership became the core of what would be called Sunnis, while those who believed leadership belonged to Ali and his descendants became known as Shia, from "partisans of Ali." Historians note that these identities hardened gradually over generations rather than appearing fully formed in 632.

The immediate legacy was the rapid consolidation and expansion of the community. Abu Bakr suppressed tribal revolts known as the Ridda wars, and his successors carried Muslim armies into Syria, Iraq, Egypt, and Persia within a few decades. Ali eventually became the fourth caliph, but his reign ended amid civil war, and the killing of his son Husayn at Karbala in 680 became a defining event for Shia memory. The succession dispute begun at Muhammad's death thus grew into a lasting division over authority, legitimacy, and religious interpretation.