Islam The Religion of Submission to God Islam is the youngest of the major religions of the world. It is the dominant religion of the third-world nations of the Middle East and Africa and the second largest of the world's religions with about one billion followers (25% of the world population). Muslim philosophy is a blend of Arabic, Jewish, and Christian elements and one of the simplest and least complicated of the world's religions. Want to know more about Islam? Just press the key!