At the opening of the Munich Security Conference this year, German Chancellor Friedrich Merz warned that the rules-based international order is eroding before our eyes. His remarks echoed the conference’s annual report, which painted a picture of fragmentation and disorder. His remarks also echoed a growing anxiety across Europe: that the system built after 1945 is eroding under the weight of geopolitical rivalry, economic coercion and military confrontation. However, to many observers, Europe’s...