In 138 BC, Emperor Wu of the Han dispatched the diplomat Zhang Qian to find allies against the Xiongnu. He was captured for a decade, escaped, and returned with reports of vast civilizations beyond the Pamirs — Bactria, Parthia, Ferghana.
His mission opened formal Chinese contact with Central Asia. By the 1st century AD, Han silks were reaching Rome, where senators lamented the bullion drain — Pliny the Elder estimated 100 million sesterces a year flowing east.
"He saw cities walled with brick, and grapes that became wine." — paraphrased from the Shiji
"The Silk Road" is a 19th-century coinage (Ferdinand von Richthofen, 1877). On the ground it was a braided web of caravan tracks, mountain passes, and oasis cities — chosen each year by water, weather, and warlords.
From the Levant to Chang'an, ~6,400 km — but few traders ever traveled the whole way.
Goods passed through dozens of hands. The road belonged to many peoples; none of them were called "Silk Road merchants."
Iranian-speaking traders from Samarkand & Bukhara. Their language was the lingua franca of the road for centuries.
Caravan organizers, animal breeders, money-changers — masters of the central corridors.
After the 7th century, dominant from Damascus to the Indian Ocean rim — and across Saharan offshoots.
Multilingual merchants who linked Christendom, Islam, and India — recorded by Ibn Khordadbeh, c. 870.
Silk producers, monks (Xuanzang), and from Tang times resident merchants in oasis cities.
Buddhist networks, mountain pass-keepers, steppe middlemen — all with their share of the staffing.
Most goods changed hands many times; prices multiplied tenfold or more by journey's end.
If silk paid the carriers, ideas reshaped the civilizations they passed through.
Under the Tang, Chang'an was the largest, most cosmopolitan city on Earth — perhaps one million residents inside its walls, with dedicated quarters for Sogdian, Persian, Arab, and Indian merchants.
The Tang state actively patrolled the routes. Garrisons in the Tarim oases kept caravans safe. Persian refugees from Sasanid Iran (post-651) settled at the imperial court.
In 751, Tang armies met the Abbasids at Talas. The defeat ended Chinese westward expansion — but seeded paper-making across Islam.
Under Genghis Khan and his heirs, a single political order stretched from the Yellow Sea to the Black Sea. For the first time, a merchant could in principle travel coast-to-coast under one law and one passport (the paiza).
"A maiden bearing a nugget of gold could walk alone from one end of the empire to the other." — attributed legend
The same routes that moved silk and silver moved Yersinia pestis. Outbreaks in Inner Asia in the 1330s spread along caravan tracks to the Crimea — and from there into the holds of Genoese ships.
Within a decade, the Black Death killed perhaps a third of Europe and a comparable share of Western Asia. The Mongol order, already fraying, lost its grip on the central corridor.
"The road of riches was also the road of pestilence."
Long before "the" Silk Road declined, a parallel sea route was already humming — monsoon-driven Indian Ocean traffic between the Red Sea, East Africa, India, Southeast Asia, and southern China.
The ocean would soon belong to others.
The 15th century delivered a triple blow:
Spices that had cost a fortune in Venice could now be loaded directly in Calicut. The economic logic of the caravan collapsed.
The routes never truly closed. Caravans dwindled but did not vanish; the cities along them — Samarkand, Bukhara, Kashgar, Xi'an — kept their bones.
Selected references
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