Analysts of Russia differ about many things, but the most important difference concerns their interpretation of the roots of Russia’s ongoing aggression. One side argues that Russian history and political culture are to blame — or, to put it more simply, uniquely Russian characteristics are the cause of Russian aggression. The other side argues that the causes are not uniquely Russian, but typical of the behavior of certain kinds of states, regimes, societies and leaders. Unsurprisingly, historians of Russia and Ukraine tend to fall into the first camp, while political scientists with a comparative bent tend to fall into the...