The document summarizes the origins and early history of Islam. It began in 622 AD in Mecca, Arabia, with the teachings of the prophet Muhammad. Muhammad received revelations from God through the archangel Gabriel, and taught monotheism, rejecting the polytheism and idol worship of Meccan merchants. In 622 AD, Muhammad fled persecution in Mecca by migrating to Medina, marking the start of the Islamic calendar. In Medina, Muhammad's influence grew and he eventually conquered Mecca, destroying its idols. After establishing Islam across Arabia, Muhammad died in 632 AD, and Abu Bakr became the first caliph, or successor, continuing the spread of the Islamic message.