How to advance the West and the delay of the East

The only constant in the life of humanity is the constant change. When we read the letters of European Middle Ages, which reflect their fears of the invasion of the Islamic East, they are military and cultural To pour tears in a technical and glory past, but the first is to ask: How did the story turn and the hunter turned into prey? Between the history of the fall of Constantinople in 1453 by Muh...