The application of several European Free Trade Association (EFTA) countries for membership in the Common Market (EEC) is viewed in Washington with great pleasure: the development of a United States of Europe is widely anticipated. Many observers have already calculated the combined manpower, economic resources, military power, etc. of the new union, and have pointed to the decisive advantage the United States, in coalition with this “third power,” will have over the Soviet Union. Even the fact that the EEC and EFTA, if completely merged, would have 13 members is not considered unlucky: after all, the United States itself evolved out of a union of 13. It may however, be premature to prepare a celebration for the birthday of the United States of Europe. The following theoretical excursion suggests that loading the EEC with new members may well reduce it to the level of a glorified customs union rather than forward it to a political federation. Moreover, I shall argue, political communities often unify not by increasing their membership, but in a dialectic fashion: two or more groups form; they appear to be moving in opposite directions until each is well integrated, then they are “synthesized” (not merged) in a superior union. That is, they form one encompassing union without dissolving the bonds that held together the units that composed a group before the larger unification. The earlier autonomous groups become sub-groups in one union, adjusting to the new over-riding bond without being fused into one group that knows no internal divisions.