What I didn't learn in school about History. Interesting videos about the fall of intellectual advancement in early 1100 AD. Neil Degrasse Tyson on the collapse of intellectual advancement in Bagdad around 1100 AD. https://youtu.be/GApFIt-fG6c The Golden age of Islam Explained. https://youtu.be/tJJLvoDg2_E 1177 B.C When Civilization Collapsed https://youtu.be/M4LRHJlijVU