The challenge of Bani Hassan with the idea of the Imam's (a) knowledge in the first part of the second century

The Bani Hassan is one of the most important branches of the Zaidi in the middle of the second century (A.H.) which had a lot of effects on the Shia society, and they had essentially led the opposition movement against the Omayyad government and then the Abbasids. Because Bani Hassan could not attain the support of Imams (a) for their acts, so they took a kind of oppositeness and denial against them. Imams’ (a) knowledge about the future which is reached them from the Holy Prophet(s) and their exclusive knowledge about the religion which was available for them from the Commander of the Faithful (a) and the following Imams imposed a grave challenge on the legitimacy of Bani Hassan; so the denial policy about the idea of Imams’ (a) divine knowledge became a permanent approach and a profound aberration in Zaidi in the second century. This article provides a report of this movement in the turbulent period of the first part of the second century.