The Russian conquest of Siberia was an event of which the consequences have only slowly become apparent. Already great, they may come to dominate much of our world; with today’s technology, a resource base of this size and richness confers immense power on the owner. The conquest was a gradual process of absorption. But if one had to assign a time and place for its start, then one would certainly choose the campaign of Yermak in the 1580’s. This enterprise was by no means wholly successful, and probably fewer than a thousand Russians participated in it. But it was the first entry in force...