Aga Khan (Nizari Ismaili Imam)

The Nizari Ismaili branch of Shia Islam holds, like Twelver Shia Islam, that leadership passed through a designated line of Imams descended from Ali and Fatimah, but the Nizari line has never gone into occultation: it continues today in an unbroken, publicly known succession. The Ismaili line traces through the Fatimid caliphate, which ruled Egypt and much of North Africa and the Levant from 909 to 1171 CE and combined the caliphate, the office of political ruler over the Muslim community, with the Ismaili imamate. A succession dispute in 1094 split Ismailism into Nizari and Mustaali branches; the Nizaris, based for a time at the mountain fortress of Alamut in Persia, continued their own line of Imams independent of the Fatimid state after its fall.

Following the destruction of the Nizari power base at Alamut by the Mongols in 1256, the Imams lived for centuries in relative obscurity in Persia. The line re-emerged into wider prominence in the nineteenth century when Imam Hasan Ali Shah was granted the honorific title Aga Khan by the Qajar Shah of Persia, a title his successors have carried since; his descendants later relocated the seat of the imamate first to India and then internationally.

Succession among the Nizari Ismaili Imams follows hereditary designation: the reigning Imam names his successor from among his male descendants, a choice not bound to primogeniture. The mid-twentieth-century succession illustrates the point: Aga Khan III bypassed his sons in 1957 in favor of his grandson, Prince Karim, citing in his will the need for a leader shaped by the conditions of the modern, technologically changing world, a rationale explicitly recorded rather than left to inference.

Since the mid twentieth century the Aga Khan has directed the Aga Khan Development Network, a large international network of agencies working in health, education, rural development, architecture and culture across Asia and Africa, an institutional expression of the Ismaili principle that the Imam's guidance addresses the material as well as the spiritual welfare of the community. This combination of hereditary religious authority with an extensive modern development bureaucracy is distinctive among the offices in this record, most of which separate spiritual leadership from large-scale international institution-building of this kind.

The Nizari Ismaili community today numbers in the low millions and is spread across South Asia, East Africa, Central Asia and diaspora communities in Europe and North America, a geographic breadth that follows historic trade and migration routes rather than any single national homeland. Unlike offices whose authority is bound to a single monastery, cathedral or state, the Nizari imamate is explicitly transnational, and the Imam's guidance to followers, known as firmans, is communicated directly to communities worldwide rather than mediated through a fixed territorial hierarchy of the kind found in several other lineage offices in this record.