After ʿAlī became caliph, some of his erstwhile supporters resented his willingness to negotiate his status with Muʿāwiyah and his forces, believing such concession to be a repudiation of his duty to fight against rebels. ʿAlī was struck in the head with a poisoned sword by a member of this movement (known as the Khārijites).
How did ʿAlī die?
How was ʿAlī influential?
ʿAlī, Muhammad’s cousin and son-in-law, was the fourth caliph and first imam (in Shiʿism) of the Muslim ummah (community). A faction of the ummah asserted that he and his descendants (known as Ahl al-Bayt) were the only rightful successors to Muhammad. This faction is known as the Shiʿah, short for shīʿat ʿAlī (”ʿAlī’s faction”).