Islam, founded by Muhammad in 7th century Arabia, is a monotheistic religion centered on the Quran and the Five Pillars. It emerged in a polytheistic society, spreading rapidly through conquest, trade, and missionary work. The Quran, believed to be God's word revealed to Muhammad, guides Muslim life. The Five Pillars—declaration of faith, prayer, charity, fasting, and pilgrimage—form the core practices of Islam, unifying the global Muslim community.