liged to leave out larger complexes such as the Arab World, Africa, South America (the federal principle there was as a matter of fact largely adapted from the USA) as well as Europe.
It is otherwise quite certain that the studies published in this book contain a good many facts and conclusions, by which especially the advocates of a close federation of European States can profit. I am thinking here above all of the need for a supra-national feeling of solidarity, of an ideology, in this case therefore a distinctive European ideology; of common economic interests, a factor which is difficult to overrate; of the uncommon tenacity of historical traditions interwoven with a multitude of feelings and interests, owing to which the formation of a greater political unity could at times only be realized by violent means; of the threat (real or largely imaginary) from a common enemy, a threat which in some cases has brought about an unmistakably positive, unifying effect; of the problem of the diversity of languages and the economic and social contradictions as a rule indissolubly linked with it; of the decisive role that was sometimes played by a hegemonic State or province; finally of the problem of sovereignty and the control over own financial resources. A European federal system functioning adequately appears to be a political ideal which for quite a number of reasons ought to be realized. A good many European idealists, however, sometimes show a tendency, certainly in the Netherlands, to underestimate greatly the counteracting factors, of which the basis is formed by centuries-old national traditions. History, also the history that is being presented in this book, might, we hope, induce them to adopt a somewhat more realistic attitude.
In the papers published here we are confronted with a large variety of federal and regional aspirations and ambitions. In the discussions, which were at times interesting and lively as well, it, too, proved to be difficult to arrive at clear, historically well-grounded definitions. Indeed, the very terminology in use in various countries reveals a good deal of divergency. Thus the federalists in the USA were biased in favour of a strengthening of the central governmental authority, while the Swiss and Dutch federalists stood in the breach, if not for sovereignty, then certainly for the greatest possible independence of cantons and provinces respectively. During the discussions the idea was put forward that the word ‘federalism’ itself was only a vague general term, in a sense even a rather meaningless abstraction. It was concluded that we ought to take into account very seriously a wide variety of specific conditions and circumstances peculiar to specific periods and countries.
On the other hand, we are confronted time and again with a general outlook, a universal mental attitude, however much based on material interests, which proved to be, to quite a considerable extent, the same in all the cases we discussed: the natural tendency of people to make their own decisions about their