Islam is a monotheistic world religion based on the belief in one God, named Allah, and the teachings of His final prophet, Muhammad. Followers of Islam, called Muslims, strive to live in complete submission to God's will by following sacred scriptures. The central text of Islam is the Quran, which Muslims believe is the literal word of God revealed to Humanity. Today, Islam is the second largest religion in the world, with over one billion followers across the globe.