The Islamic world from the eighth to the twelfth centuries, and Byzantium from the eighth to the eleventh centuries far surpassed Europe in wealth, territory, military power, and artistic, literary and scientific achievements. Between the eleventh and thirteen centuries, European culture began to develop, facilitated by the "eager and systematic appropriation of suitable elements from the higher civilization of Islam and Bizantium, together with adaptation of this inheritance to the special conditions and interests of the West".

P. 50. - The Clash of Civilizations and the Remaking of World Order (1996)