From Versailles to Maastricht is a history of international organisation in the twentieth century. While particular attention is paid to the League of Nations, the United Nations and the European Union, there are also chapters on other regional organisations and on international regimes in areas like the law of the sea, the international economic order, business rights and nuclear nonproliferation. The book's approach is thematic and analytical, while also aiming to provide a succinct factual account of the main developments in international organisations this century.