Why Did Islam Spread So Fast?

Islam is a constantly spreading religion embraced by many. It was inspired in 610 CE, when a man named Muhammad went to a cave in Mount Hira to pray. It was claimed that there, an angel named Gabriel told Muhammad of a one true god named Allah. This inspired Muhammad to spread the ideas of Allah, beginning the world-wide religion known as Islam. Although it met much resistance in the city of Mecca at first, the religion grew and Muhammad was seen as a prophet of Allah. After Muhammad’s death in 632 CE, all of his teachings were recorded in a book called the Qur’an, and the religion continued on to spread. Within 100 years of Muhammad's death, Islam had spread past the Middle East and went to other continents, such as, Africa, Asia, and Europe (Background Essay). Which begs the question, why did Islam spread so fast?
Due to a lack of supplies, a village would have to take or borrow from other tribes. Before Islam, many tribes involved themselves in “ghazis”, raids against other tribes. As Islam spread to a few tribes, so did the rules. A group of Muslim tribes wouldn't be able to attack each other because they are a community. So Muslim communities would instead focus on non-Muslim tribes. This prompted tribes or villages to convert to Islam to avoid, or join the Muslim community (Doc. D). By 750 CE, Islam had spread from Mecca and Medina, to all over the Middle East such as in Baghdad and Jerusalem (Doc.