Geopolitics now weighs more heavily on us than at any time since the end of the Cold War. While the Russian invasion of Ukraine has revived trans-Atlantic cooperation and raised the spectre of new competition between rival poles, the economic growth of countries in the Global South - and of China in particular - continues to challenge the dominance of the West. In an increasingly multipolar and multi-conceptual world, singular ideas about how best to look after global affairs have been replaced by a diffusion of power and political values. This calls into question alliances and multilateral institutions that have been cornerstones of the global order since World War II, and risk...