599-661 AD An early [[Muslim]] leader; the last of the 'Rightly Guided Caliphs'.
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599-661 AD An early [[Muslim]] leader; the last of the 'Rightly Guided Caliphs'. [[Shiite]] Muslims believe that Ali was the true successor to [[Mohammed]] whereas [[Sunnis]] do not. This caused the rift between the two branches that has continued to this day.