Abstract
The interbellum period is analysed in order to historicise the successes and failures of the League of Nations. Such historicisation recounts the initial hurdles that faced the creators of the League, the success it enjoyed during its first decade of existence, and the eventual downfall that the international organisation suffered during the 1930s as it failed to deal with States prioritising their realist ambitions over the collective goals of the international community. By mapping out and examining the conditions under which the League of Nations succeeded and failed, the positive influence of utopian focal goals can be identified when the League was successful in maintaining international peace and security, whilst also demonstrating how reliant international law is on the will of States. Furthermore, such analysis highlights how willing States can be to undermine international law if an advantage can be gained.