Islam is a monotheistic religion that teaches belief in one Allah, following the guidance revealed to the Prophet Muhammad ﷺ, and living a life of worship, morality, and justice based on the Qur'an. Islam is one of the world's largest religions, with over 1.9 billion followers . Introduction to Islam Islam is a complete way of life. It includes faith, worship, character, law, and social responsibility. It teaches peace, justice, compassion, and accountability before Allah. What Does the Word "Islam" Mean? The word Islam comes from the Arabic root "S-L-M," which relates to: Peace Submission Surrender Islam means submission to the will of Allah . Therefore, Islam is the religion of willingly submitting to Allah in order to achieve peace in this life and the next. What Is a Muslim? A Muslim i