Look carefully at Maps 10.1, "Afro-Eurasian Trade, 1000-1300" and 11.1, "The Spread of the Black Death." What do these two maps together tell us about the relationships among the trade routes that linked distant regions of the Afro-Eurasian world, the movements of nomadic peoples in the Afro-Eurasian world, and the spread of the Black Death? Which regions suffered most heavily from the plague? Which suffered the most from the Mongol invasions? What do these maps together suggest about the relationships linking trade, Mongol invasions, and the spread of the Black Death?