public and private participation.

After the Second World War the victors, drawing upon experience from the League's failure, created the United Nations in 1945. Since then, the "breadth and diversity" of multilateral arrangements have escalated. Unlike the League, the UN had the active participation of the United States and the Soviet Union, the world's then greatest contemporary powers. Along with the political institutions of the UN, the post-war years also saw the development of organizations such