The Islamic civilization was destroyed by islam itself I'm afraid
Once its theology crystallized and muslims realized that the greek thought was rather an enemy of the faith it followed a continuous downhill which never ended (the relative prosperity of the first centuries of islam is rather a consequence of the fact that they conquered some of the richest regions in the world at the time and that, happily, the incipient Islamic civilization adopted initially some values of those conquered, parts of the greek thought included). Centuries after the disaster you mentioned the Islamic world still not managed to recover despite plundering many infidel countries in the meantime.
Travelling in the 'magnificent' and 'moderate' Ottoman Empire in the 1860s Mark Twain could only report about the black misery in which he found Syria and Palestine (see
The innocents Abroad):
I'm afraid quite much of the 'wisdom' taught today about islam is a fiction, the hated 'orientalists' being much closer to the truth...
It is interesting also to note what he wrote about the attitude of muslims over the Americans who visited their lands:
And now we are told only about the alleged 'tolerance' of islam when in reality the classical islam was a monument of injustice, islamist at the core (with dhimmis marginally better than slaves in classical antiquity, the fact that in enough many instances the situation of religious minorities was worse in medieval Europe cannot change anything i'm afraid).
