What are the cause of decline of Abbasid?

The decline of the Abbasid Caliphate was caused by a combination of internal strife, economic difficulties, and the rise of regional powers. Political fragmentation and civil wars weakened central authority, leading to the emergence of autonomous states. Additionally, economic challenges, such as reliance on trade and taxation, exacerbated social unrest. The Mongol invasions in the 13th century ultimately culminated in the fall of Baghdad in 1258, marking a significant blow to Abbasid power.