Since its emergence as an organized state, Russia has collided with the West. For over a millennium, the two have clashed economically, politically and militarily, using the countries that form the buffer between them as a staging ground for their rivalry. With Ukraine's Euromaidan uprising and Russia's subsequent annexation of Crimea in March 2014, the long-standing conflict has been renewed. But just as the end of the Cold War did not end hostilities between Russia and the West, neither will a resolution to the Ukrainian crisis erase the fundamental imperatives that have pitted the two against each other for more than a thousand years. ...