What was one result of World War I?

The formation of the League of Nations was a significant outcome of World War I, aiming to promote peace and prevent future conflicts between nations. Established in 1920 as part of the Versailles Treaty, the League was an international organization designed to foster cooperation and diplomacy among countries to resolve disputes through dialogue rather than warfare. This was a pivotal shift in international relations, emphasizing a collective security framework for global peace, although it faced challenges and ultimately did not prevent the outbreak of World War II.

In contrast, while the end of monarchies in Europe did occur in various nations following the war, it was not a direct or singular result of the war itself, but rather a complex interplay of factors. The Cold War began later in the mid-20th century, stemming from tensions after World War II rather than World War I. Additionally, the European Union was established long after World War I, with its roots in post-World War II economic cooperation among European countries. Therefore, the League of Nations stands out as a direct consequence of the efforts to create a more stable and peaceful international order following the devastation of World War I.