John Edward Wansbrough (February 19, 1928 – June 10, 2002) was an American historian who taught at the University of London's School of Oriental and African Studies (SOAS), where he was vice chancellor from 1985 to 1992.By his fundamental criticism of the historical credibility of the classical Islamic narratives concerning Islam's beginnings and his attempt to develop an alternative, historically more credible version of Islam's beginnings, Wansbrough founded the so-called "revisionist" school of Islamic Studies.