The power struggle after Harun al-Rashid in the Abbasid caliphate Emphasizing the theory of Laclau and Mouffe

Governments and political rulers have always had plans to gain power. Harun al-Rashid divided the areas of the caliphate among his children, and after him, gaining power and the caliphate became the reason of conflict between the successors. In the meantime, Mamun played an important role in consolidating the Abbasid caliphate and his taking office by adopting political plans and actions in gaining power and caliphate. This article, documenting sources and based on Laclau and Mouffe's discourse theory, by tracing the roots of the power struggle between Amin and Mamun, studies and evaluates Mamun's actions to achieve power and caliphate. According to this theory, there is a forced effort and struggle between suppressed power and deprivation to create conditions in the establishment of dominance and hegemony. Dominant exercising in the form of exercising power as a political plan always try to impose their will on others. It seems that Mamun used every method and action on the way to gain power and reach the caliphate, and he set his main goal to gain power.