 Scholars point out that Salafism is a term applied to several forms of puritanical Islam in various parts of the world, while Wahhabism refers to the specific Saudi school, which is seen as a more strict form of Salafism.According to Ahmad Moussalli, professor of political science at the American University of Beirut, "As a rule, all Wahhabis are Salafists, but not all Salafists are Wahhabis".Yet others say that while Wahhabism and Salafism originally were two different things, they became practically indistinguishable in the 1970s.