He was a member of the Muslim Brotherhood and in '44, he joined and swore allegiance to Hassan al-Banna on a Koran.

CENTERFORSECURITYPOLICY: Center For Security Policy

Another, in the 18th century, was Muhammad ibn Abd al-Wahhab, who advocated purging Islam of modern accretions and relying strictly on the Koran and hadith (the record of the prophet's words and deeds).

ECONOMIST: In the name of Islam

They follow the trail of al-Suyuti, a 15th-century Egyptian who accepted the existence of slightly different versions of the Koran.

ECONOMIST: Muslims and the Koran