Frederick Starr: Lost Enlightenment

Very interesting account of the rise and fall of the arab enlightenment in central asia.

First chapter here: http://press.princeton.edu/chapters/s10064.pdf

From that chapter:

There is no more vexing question regarding the flowering of intellectual and cultural life in the era of Ibn Sina and Biruni than the date of its end. The most commonly accepted terminus point is the Mongol invasion, which Chinggis Khan launched in the spring of 1219. But this turns out to be both too early and too late. It is too early because of the several bursts of cultural brilliance that occurred thereafter; and it is too late because the cultural and religious crisis that threw the entire enterprise of rational enquiry, logic, and Muslim humanism into question occurred over a century prior to the Mongol invasion, when a Central Asian theologian named Ghazali placed strict limits on the exercise of logic and reason, demolished received assumptions about cause and effect, and ruthlessly attacked what he considered “the incoherence of the philosophers.”1 That he himself was at the same time a subtle and nuanced thinker and a genuine champion of the life of piety made his attack all the more effective.