What are some defining legacies of World War I for the international order?

• A. The spread of colonial administration across all continents
• B. Redrawn borders, the League of Nations, the idea of collective security, and groundwork for future conflicts, plus social and technological changes
• C. The dissolution of all international organizations
• D. The immediate establishment of a lasting permanent world government

Answer: (B)

World War I reshaped how nations organize themselves in the international system through a mix of political, institutional, and social changes. The redrawing of borders after the war reconfigured maps and created new states, especially in Europe and the Middle East, which changed diplomatic calculations and power dynamics for decades. At the same time, the war led to the creation of formal international mechanisms, notably the League of Nations, which embodied a move toward collective diplomacy and security—an idea that nations should act together to prevent aggression rather than rely solely on shifting alliances. This shift in security thinking—moving toward collective security as a norm—helped establish a framework that influenced international relations long after the war, even when the League faced serious challenges.

The war also left a footprint by laying groundwork for future conflicts. The treaties that followed created grievances and power shifts that would feed into later tensions and the path to another major war. Beyond politics, World War I accelerated social and technological changes that transformed international interactions: women won new voting rights in many countries, labor movements gained strength, and advances in weapons, communication, and transportation reshaped how states fought and negotiated.

The other options don’t fit this broader, lasting impact. The postwar era did not spread colonial administration across all continents as a defining legacy, international organizations were not dissolved and, in fact, new ones emerged, and there was no move toward an immediate, lasting world government.