This three-page undergraduate paper examines Liberalism and analyzes its influence on World War One and the Cold War. The author notes that Liberalism promotes civil liberties, freedom of expression, religious toleration, and popular participation in the political process, and argues that it is more effective in explaining the Cold War than World War One, for it was the primary source of contention between the communist world and the free world. In contrast, World War One can be better explained by nationalism, colonialist aspirations, and entangling alliances.