Islam
Sunnism considers Abu Bakr to be the successor of Muhammad. Sunnis make up roughly 75% of Muslims. Sunnis believe that leaders of Islam should be chosen by the people of the Muslim world. After Abu Bakr died, Omar took his place, then Uthman, and then Ali. All of them were companions of Muhammad and lived in Medina. Sunni beliefs are typically based on the Qur'an and the Kutub al-Sittah (six hadiths). Sunnis are sometimes called Bukharists.