Alids
In early Islam, those who contended that only a member of the Prophet's clan of Hashim (descendants of Ali ) should rule and that political legitimacy lay in genealogy; the Shii community. Others, such as the Umayyads, held that consensus of the Muslim community was necessary to establish a legitimate claim to head the Islamic community. Alids fomented numerous uprisings in the last years of Umayyad rule ( 661 – 750 ). By the late eighth century, some Shiis had developed the imamate concept, which held that only an Alid could rightfully claim leadership of the Muslim community.