The document summarizes the origins and early expansion of Islam. It describes pre-Islamic Arabia and the life of Muhammad, who received revelations from God and began preaching Islam. Muhammad's followers faced persecution in Mecca, leading to the Hijra or migration to Medina in 622 and establishing the Muslim calendar. The five pillars of Islam are outlined as professing faith, daily prayer, pilgrimage to Mecca, fasting during Ramadan, and alms-giving. The early Islamic caliphates rapidly expanded the Arab Empire across the Middle East and North Africa under the Rashidun and Umayyad caliphates before the Abbasids moved the capital to Baghdad.