This part examines key issues of the 1920s world order, from the League of Nations and the vision of a world federation to military and diplomatic strategies in the imperial age and the rise of aviation technology. It analyzes France’s ascendancy, the possibility of Germany’s fragmentation, and the future of the British Empire. Personal portraits of political figures and critiques of governance highlight the shortcomings of domestic and international political systems, calling for reform. The positions and strategies of peripheral nations like Spain, Italy, and Latin America are also discussed. Overall, it explores the interplay of cooperation and rivalry in a shifting global political landscape.