In 1987, Soviet political scientist Georgy Arbatov told off his American counterparts, saying, “We are going to do a terrible thing to you. We are going to deprive you of an enemy.” The West laughed off the warning, but it should have known better. If there was ever something that held the entire NATO alliance together, it was the common threat of the totalitarian regime beyond the Iron Curtain. Once that threat lost its plausibility, the fractures that had only been masked b