The Abbasid fall from grace was long and messy. It’s been a while since the dynasty produced a powerful caliph, the last one being the almighty restorer al Mu’tadid who reigned until the opening years of the 10th century. The subsequent decades saw a sustained and accelerating erosion of the state’s wealth, prestige, and authority. Whenever things looked like they couldn’t get any worse, what was thought to be rock-bottom gave way to reveal a deeper abyss. The ruling clan’s enfeeblement crescendoed in the 940’s, until it became a simple matter for another dynasty to swoop in and take all that the Abbasids had inherited.