Ali, Fourth Caliph of Islam, Dies After Assassination
On January 29, 661, Ali ibn Abi Talib, the fourth caliph and cousin and son‑in‑law of the Prophet Muhammad, died in Kufa (in present‑day Iraq) from wounds inflicted by an assassin’s poisoned sword. According to early Islamic chronicles, he had been attacked in the mosque while leading morning prayers two days earlier. Ali’s death ended the Rashidun (“Rightly Guided”) caliphate and opened the way for the Umayyad dynasty under Muʿawiya. The split over his legacy would deepen the divide between Sunni and Shia Muslims, shaping Islamic religious and political life for centuries.