Indians’ closest genetic relatives are indigenous Siberians. They did not come into substantial contact with Europeans until the sixteenth century, when Russian fur merchants overturned their governments, established military outposts throughout the region, and demanded furs in tribute. In the train of the Russian fur market came Russian diseases, notably smallpox. The parallels with the Indian experience are striking. In 1768 the virus struck Siberia’s Pacific coast, apparently for the first time. “No one knows how many have survived,” confessed the governor of Irkutsk, the Russian base on
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