At the same time, Russia’s awesome feats of expansion took place from a demographic and economic base that, by Western standards, was not advanced—with many regions thinly populated and seemingly untouched by modern culture and technology. Thus the world-conquering imperialism remained paired with a paradoxical sense of vulnerability—as if marching halfway across the world had generated more potential foes than additional security. From that perspective, the Czar’s empire can be said to have expanded because it proved easier to keep going than to stop.

