 His "L'Avenir économique, politique et social en Europe" – The Future of Europe in Economic, Political and Social Terms – published in Paris in 1885 was in effect, a blueprint for a unified Europe with a customs union, a central statistical office, a central bank and a single currency.Following the catastrophe of the First World War, thinkers and visionaries from a range of political traditions again began to float the idea of a politically unified Europe.In the early 1920s a range of internationals were founded (or re-founded) to help like-minded political parties to coordinate their activities.