Traders exchanged such items as silk, which was especially important to the Romans, ceramics, glass, precious metals, ivory, gems, medical herbs, exotic animals, and livestock on the silk road. Inadvertently, the silk road transmitted language, disease, and genes. Alliances were forged to fight against common enemies. Buddhism made use of the Silk Road in its spread to Central Asia and China. Manichaeism and Islam also spread along the routes. The road, a series of caravan routes with trading posts and oases, extended almost 7000 miles from Rome and Syria to the Yellow River, in China, and lasted from about the Han Dynasty in the 2nd century B.C. to the 14th A.D. by which time sea routes were replacing the Silk Roads.
Sources:
- "Silk Roads or Steppe Roads? The Silk Roads in World History," by David Christian. Journal of World History 11.1 (2000) 1-26.
- "India's Encounter with the Silk Road," by Subhakanta Behera. Economic and Political Weekly, Vol. 37, No. 51 (Dec. 21-27, 2002), pp. 5077-5080.


