The Sunnis believe that the correct leader of Islam is one who is voted by the Islam communities. They regard Abu Bakr, Muhammad’s close friend and advisor, as the correct heir to the leadership. Another difference between the Sunni Muslims and Shiite Muslims is the belief of the Mahdi, the ‘Rightfully Guided One.’ They both believe that the Mahdi would serve as the caliph of all Islam, the Sunni Muslims believe that he hasn't come into the earth yet. On the other hand, the Shiite Muslims believe that the Mahdi had already arrived to earth, and will be returning
