The document provides background information on the origins of Islam in Arabia in the 7th century. It describes how before Muhammad, Arabia was inhabited by independent tribes, both nomadic Bedouins in the interior and settled tribes along the coasts who practiced animism and polytheism, respectively, but shared a common Arabic language and cult centered around the Kaaba in Mecca. It then discusses Muhammad, born in 570 CE, who received revelations from God and brought the Arab tribes together under the new religion of Islam between 610-632 CE, establishing political and religious authority. Finally, it provides a brief overview of how Muhammad's successors, the caliphs, expanded the Islamic empire through conquest in the following centuries.