The end of one year and the beginning of a new year offers the opportunity to reflect on the past and to consider what might lie ahead. In the context of the transatlantic relationship, there is a great deal of history to draw upon – and much to anticipate as we think about the coming year. Thirty years ago in June, President Ronald Reagan made his famous speech in West Berlin imploring the leader of the Soviet Union, Mikhail Gorbachev, to “tear down this wall!” that had divided West and East Berlin since 1961. Next month will mark the 25th anniversary of the signing of the Maastricht Treaty, which set the stage for greater political integration and launched Europe’s economic and monetary union. And, 15...