What events led to the fall of the abbasid empire?

They (as in the poor and lower class) began to question the rights of the Caliphs to be ruling/guiding them. There was negligence in the government and no one was running it properly allowing for the Turks to gain the upper hand causing riots not to mention Muslims and non Muslims were clashing ideas. The empire got to big and out of hand for anyone to control.

Yes, reasons why is sectionalism compromise of 1850 and secession i hope this