Masha Lipman, one of the great chroniclers of Russian politics, told a story at a conference I attended outside of Moscow earlier this week. It was about two scholars who, in a recent discussion about the history of Russia and the Soviet Union, fell into a savage argument. One saw the end of the Soviet Union as a tragedy, the other as a release from tyranny. So radical and bitter was the disagreement that they came to blows, an unheard of event in the generally decorous world of Russian academia.