In an insightful news analysis published in today's New York Times, Sam Tanenhaus suggests that the real lessons we should be drawing from the Cold War as we contemplate possible responses to Russia's violation of the Ukraine's sovereignty are lessons about restraint. "The truth is," Tanenhaus writes, "that the Cold War was less a carefully structured game between masters than a frightening high-wire act, with leaders on both sides aware that a single misstep could plunge them into the abyss."