Wahhabism is a religious movement or a branch of Islam. It was developed by an 18th century Muslim theologian (Muhammad ibn Abd al-Wahhab) (1703–1792) from Najd, Saudi Arabia. Ibn Abdul Al-Wahhab advocated purging Islam of what he considered to be impurities and innovations. Wahhabism is the dominant form of Islam in Saudi Arabia. It has developed considerable influence in the Muslim world in part through Saudi funding of mosques, schools and social programs. - Source: Wikipedia