Professor of religion Huston Smith says in "The World's Religions: Our Great Wisdom Traditions" "But for their defeat by Charles Martel in the Battle of Tours in 733, the entire Western world might today be Muslim." Historian Robert Payne on page 142 in "The History of Islam" said "The more powerful Muslims and the spread of Islam were knocking on Europe's door. And the spread of Islam was stopped along the road between the towns of Tours and Poitiers, France, with just its head in Europe."