The 4th/10th century witnessed the rise of a movement which created a synthesis between Salafite views and theological methods. This, in turn, laid the ground for the formation of major theological schools in Islam, the eminent example of which was the school founded by Ash`ari. Islamic theology underwent a major development in this period, one that swept through the Sunni as well as the Shi`ite circles. A comprehensive survey of the theological thought in the 4th – 6th centuries AH calls for an analysis of the major movements of the period.
Jalali moghadam , Masood "Islam Entry" The Great Islamic Encyclopedia. Ed. Kazem Musavi Bojnourdi.Tehran: The Center of Great Islamic Encyclopaedia , 1989-, V.8 ,pp.433 - 434