632–661 CE
A new institution
After the Prophet Muhammad’s death, leadership of the community developed into the institution of the caliphate. The conventional Rashidun period covers the rule of Abu Bakr, Umar, Uthman and Ali. The designation ‘Rightly Guided’ belongs especially to Sunni historical and religious usage; Shi‘i traditions assess succession through a different understanding of the Prophet’s household and the Imamate.
Leadership and change
Historian Ira Lapidus describes the early caliphate as an evolving institution rather than a fixed system established in a single moment. Its leaders combined religious-community leadership with the political demands of an expanding coalition. The period therefore needs study through several questions: succession, administration, territorial expansion and conflicts within the community.
The transition of 661
Ali’s death in 661 marks a conventional boundary between this period and the Umayyad dynasty. A date boundary helps organize a timeline, but it does not settle theological claims or make every community’s memory of the transition identical. Read individual biographies alongside the institutional history.
Sources and further study
Ira M. Lapidus — The Caliphate to 750, Cambridge University Press
The Metropolitan Museum of Art — transition to the Umayyad period