After Mohammed’s death in 632, leadership of the Islamic community passed to Abu Bakr as-Siddiq, one of Mohammed’s closest companions. Some in the community felt that this succession was not legitimate, and that the title of caliph really belonged to Ali ibn Abi Talib. Ali’s claim was supported by the fact that he was Mohammed’s cousin, his adopted son, his first convert (at the age of nine), and husband of his daughter Fatima. Both sides believe that Mohammed specifically designated their man: Supporters of Abu became the Sunnis, those of ibn Ali the Shiites.
