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Islam ( / ˈ ɪ s l ɑː m / ; [A] Arabic : اَلْإِسْلَامُ , romanized : al-’Islām , [ɪsˈlaːm] ( listen ) "submission [to God]") [1] is an Abrahamic monotheistic religion teaching that Muhammad is a messenger of God. [2] [3] It is the world's second-largest religion with 1.8 billion followers or 24.1% of the world's population, [4] [5] known as Muslims . [6] Muslims make up a majority of the population in 49 countries . [7] Islam teaches that God ( Allāh ) is alone , merciful , all-powerful , and unique , [8] and has guided humanity through prophets , revealed scriptures , and natural signs . [3] [9] The primary scriptures of Islam are the Quran , believed to be the verbatim word of God, as well as the teachings and actions (called the Sunnah , composed of accounts called Hadith ) of Muhammad ( c. 570 – 632 CE ). [10] Muslims believe that Islam is the complete and universal version of a primordial faith that was revealed many times before through...