What forces led to the fall of the Mongols?
“By 1260 these and other internal struggles over succession and leadership had led to a gradual breakdown of the Mongol Empire. Because the basic organizing social unit for the Mongols was the tribe, it was very difficult to perceive a loyalty that went beyond the tribe. The result was fragmentation and division. And added to this was yet another problem: As the Mongols expanded into the sedentary world, some were influenced by sedentary cultural values and realized that, if the Mongols were to rule the territories that they had subjugated, they would need to adopt some of the institutions and practices of the sedentary groups. But other Mongols, traditionalists, opposed such concessions to the sedentary world and wanted to maintain traditional Mongolian pastoral-nomadic values.