The international system is at a historical inflection point. As Asia continues its economic ascent, two centuries of Western domination of the world, first under Pax Britannica and then under Pax Americana, are coming to an end. The West is losing not only its material dominance but also its ideological sway. Around the world, democracies are falling prey to illiberalism and populist dissension while a rising China, assisted by a pugnacious Russia, seeks to challenge the West's authority and republican approaches to both domestic and...