Muhammad was born after his father died, and his mother died when he was six years old. He was then raised by his grandfather until he too died, when Muhammad was eight, after which he was raised by an uncle, a poor man but an influential leader of the Quraish tribe.
He became a respected trader and merchant, but when he was 40 he received the first of the revelations from Allah which comprise the Qur'an and formed the basis of one of the world's major religions, making Muhammad one of the most influential people of all time.
He was also an adoptive father: he freed and adopted a slave given to him named Zaid bin Haritha.