The document discusses the impacts of the Mongol Empire from the 1200s to 1300s, which had both positive and negative effects. Positively, the Mongols established a period of peace and stability across Eurasia that led to economic and cultural development, and they protected trade routes which allowed the spread of goods and ideas between East and West. However, the Mongols also destroyed empires and cities, killed millions, and spread the Bubonic Plague from Central Asia along trade routes, which was devastating in Western Europe in particular from the 1330s to 1350s.