The succession subsequently transformed under the Umayyads from an elective/appointed position to being effectively hereditary within the family, leading to the complaint that the caliphate had become no more than a "worldly kingship." The Shi'ite's idea of the succession to Muhammad similarly evolved over time. Initially, some of the early Shia sects did not limit it to descendants of Ali and Muhammad, but to the extended family of Muhammad in general. One such group, alongside Sunnis, supported the rebellion against the Umayyads led by the Abbasids, who were descendants of Muhammad's paternal uncle Abbas. However, when the Abbasids came to power in 750, they began championing Sunni Islam, alienating the Shi'ites. Afterwards, the sect limited the succession to descendants of Ali and Fatimah in the form of Imams.