ABSTRACT
Federalism and functionalism emerged as opposed doctrines in the context of interwar critiques of the League of Nations, whose failure represented the most serious challenge to twentieth century liberal thought. Of all the ideas represented in the New Europe Movement, it was the doctrines of functionalism and federalism that dominated the process of integration. It was their advocates who brought elites and governments to the Hague and to Strasbourg, and who drafted the Paris and Rome Treaties. In Britain, David Mitrany's tract had undergone four reprints and his conception of functionalism became promoted in a series of important speeches and conferences during the course of 1945 and 1946. At the Stichting Grotius Semarium in 1961, Mitrany countered Haas' claim for the functional approach with the first version of his oft-reprinted Federalism Versus Functionalism, in which he distinguished true functionalism from the specious federal functionalism of the neo-funetionalists.
