Can Russia and the United States really move beyond their bitter Cold War rivalry to a genuinely cooperative relationship? Yes, argues distinguished diplomat James Goodby, but only if the United States, together with its European allies, promotes a new "logic of peace" to which NATO enlargement could contribute. During the nuclear standoff, a network of norms, rules, and structures kept the peace between the superpowers in Europe. Today, a new logic must be established, one that builds on mutual concerns to combat nuclear terrorism, reduce nuclear weaponry, and avoid the kind of bloodshed seen in the former Yugoslavia.