Islam is a major world religion. Its origin can be traced back to 610 CE in Arabia. The basis of this religion is the revelations to the prophet Mohammad. Dissatisfied with his life, he traveled to deserts, hills, and the wilderness surrounding Mecca, where he lived, to meditate and reflect. He became a new man through his revelations, which many of his followers believe Allah transmitted to him through his angel Gabriel. Islam was originally an Arab religion, but many different beliefs and practices were added to it, making it extremely popular and aiding in its rapid spread. This new religion spread to many different areas surrounding Arabia, both under Mohammad and after his death. The Muslim Empire grew to encompass Spain and the Eastern Roman Empire as well Persia and Africa. Many different practices and methods were used to spread Islam. The religion itself was appealing to, in addition to the inhabitants of Arabia, other people in the surrounding areas because of its distinct religious beliefs and practices, such as the five pillars, as well as the humility and prayerfulness of the Islamic people. They fought cruel, vicious wars with their enemies. Many different things motivated the warriors to expand, but above all, the riches they would gain from the people of the Fertile Crescent encouraged them to expand.