Even before U.S. President Donald Trump’s attack on the global economy, it was experiencing not only a structural crisis, but also a crisis of values that once justified and guided international cooperation. The declining role of multilateralism, i.e. multilateral relations, is explained not only by the weakening of international organizations and geopolitical tensions, but also by the loss of unified principles of international cooperation, the shift to unilateralism, transactional diplomacy, and zero-sum nationalism.