The emergence, growth and expansion of the European Community has been one of the most significant developments of post-war international scence. Now encompassing 15 independent nations with a total population of some 362,000,000 people, the European Union exerts a major influence on the economies and politics, not only of the member states, but also of the world as a whole. European integration was conceived from the outset as process of modular construction, concentrating initially on a limited field and intended to expand into full political union. For the supranaionalists, a “United States of Europe” is the final aim of the european construction. This paper intends to analyze the idea of a united Europe in its historical context, tracing it back to the antecedents and their association of Europe with eternal peace.