Muslims are the followers of the religion of Islam (those who submit to the will of God as explained in the Quran and the traditions of Prophet Muhammad, the Messenger of Islam). Today, the Muslim population is over a billion and it is spread over a vast range of races, nationalities, and cultures. Approximately 18% of the Muslims live in the Arab world, while the majority live in Asia and Africa. The largest Muslim population is in Indonesia, and a significant number of Muslim minorities exist in Russia, China, Europe, North America, and South America. The Muslim population in the United States is estimated to be around six million.
 Traditions are referred to in the Arabic language as Hadith or Sunnah and these are the actions, words, and recorded acts of consent of the Prophet Muhammad in matters pertaining to the meaning and practices of Islam which have been transmitted through a line of reliable and authentic narrators.