Following the death of Muhammad in 632, a strong body of opinion within the nascent Muslim community—the antecedents of the Shi'a—held the Family of Muhammad (Al Muhammad) to be the only rightful leaders, who would have the divine guidance necessary to rule according to the Quran and bring justice. These sentiments were fed by the increasing discontent against the Umayyad dynasty, which ruled the Caliphate from 661 until 750. Initially, they were expressed by a succession of failed risings—most notably the Battle of Karbala in 680 and the uprising of Zayd ibn Ali in 740—in support of various Alid claimants, i.e. the descendants of Ali, the cousin and son-in-law of Muhammad and fourth Caliph (r.