‘For Europe has come to realize that it represents not only variety. It is also unity, unity in diversity. Amidst all the differences there is a basis substance of identical elements, conditions, capacities, values, and psychological as well as intellectual concepts held in common, a sense of interdependence in happiness or misfortune, in jointly shaping or suffering our fate, in great common weaknesses, but also in brilliant common achievements—cultural, economic and political. […] Europe has now undertaken to give political expression and political form to this unity in diversity. This is happening most forcibly, intensively and in the most advanced manner in our European Communities, where essential sectors of economic policy are placed under a Community discipline with the help of organizational means patterned in the experiences gained with federal constitutions.’