Pakistan's Babusar Pass, part of the Silk Road

Trade Networks Also Built Death Networks

In the post-classical world, epidemics could travel astonishing distances by land and sea. The same routes that moved merchants and pilgrims also moved pandemics.

Post-classical History: How Plague Reshaped the World

6th-century Sasanian defense lines in modern-day Derbent, Dagestan Russia

The First Shock Crushed Old Empires

The Plague of Justinian devastated cities and destabilized the Byzantine and Sasanian worlds. The severe loss of workers and soldiers helped weaken both empires before the early Muslim conquests.

Post-classical History: How Plague Reshaped the World