Ahmet.T.Kuru. Sources: Cambridge. We maybe ask: “how Crusade and Mongols Invasion weakened Islamic Knowledge"? And what impact from this disaster weakened Islamic Knowledge and civilization? At this article, we will read perspective by Ahmet Kuru, one Turkish Political Lecturer at San Diego University, USA. Ok, please read this article until end for get complete perspective about this topic and please subscribe my blog for more information about Islamic History and Civilization. It is easy verb for you, but have big role for support us flow our blog that focuss educate people about Islamic History and Civilization. According Ahmet T.Kuru, at his book: Islam, Otoritarianisme, dan Ketertinggalan that published by KPG ( Kepustakaan Populer Gramedia ) at 2021 AD, from 1095 AD to 1291 AD, broke disaster of Crusade. European Crusaders invaded Middle East and they can occupied several Middle East s cities, such as Antioch and Edessa at Turkey, Tripoly at Lebanon, Acre and Jerusalem at...