hi! not discouraging other responses, but you may be interested in some of these

• I understand the Islamic golden age was from 750 to the 1200's. Why did it end? Gengis Khan?

• What ended the Islamic Golden Age?

• Wikipedia claims that the siege of Baghdad by the Mongols (1258) was the end of the Islamic "golden age". Is this true? How are the Mongols remembered in modern Islam?

• What were the factors that lead to the fall of the Muslim/Islamic Empire

• Why was Mongols' siege of Baghdad so destructive? Is it true that Baghdad was an exception, in that this was not Mongols' usual mode of operation?

• Did Mongols cause the cultural shift from pro-scientific to more dogmatic in 11th in Islamic culture?

• I read somewhere that after the Mongol siege of Baghdad the Muslims became much more orthodox. Is this true?