Islam today is a rapidly growing religion: Indonesia, the most populous Islamic land, has well over 100 million Muslims. Islam means "submission to the will of God"; Muslims are "submitters" to God's will as it was communicated to the prophet Muhammad in a series of divine revelations. Islam began in the seventh century, and had evolved into various forms, including Sunni and Shi'ah Muslims, Sufi mystics, and others. It has been and remains one of the most significant influences in the world.