"The power of the Al-Sauds still rested on their alliance with clerics upholding the legacy of the holier-than-thou preacher Ibn Abdelwahhab. Born in 1703, Ibn Abdelwahhab had been inspired by the dogmatic teachings of a literalist, medieval theologian, Ahmad ibn Taymiyya, who belonged to the Hanbali school of jurisprudence, the strictest of the four Islamic schools. A complex character with a rich legacy who had lived at the time of the Crusades and sanctified war against the Christian invaders, Ibn Taymiyya would be quoted mostly for his edicts allowing war against a Muslim ruler in certain cases. He would inspire generations of activist and jihadist Salafists who ignored the nuances of his teachings."