Edited sentence: After his death,the Muslims were led by the Caliphs.And told him that he should spread the message of Allah in the world.Arab society was tribal and all the different tribes spoke Arabic.He is a prophet because he was the one who started the spread of Islam.Historical sources say that he would often go to a nearby cave to meditate and pray.On one of his visits to his cave,it is beleived he had visions of the Angel Jibril.Prophet Muhammad was born in Mecca in Arabia,a hot desert land.The angel revealed to him the divine message of god.Today Muslims are split into 2 groups,the Shias and the Sunnis