Vladimir Putin's Russia is a disaster of a declining population, corruption, authoritarianism, a warped economy and a high rate of alcoholism. Why, then, would Putin want to ruin additional territory in Crimea and Ukraine the way that he has wrecked most of Russia? Doesn't Russia have enough land for its diminishing population? Are there not enough minerals, timber, gas and oil for Putin's kleptocrats? In the modern age, especially since Karl Marx, we rationalize the causes of wars as understandable fights over real things, like access to ports, oil fields, good farmland and the like. Yet in the last 2,500...