At the other limit there are social groups so separated by rivers, seas and mountains, by strange languages and gods, that what one of them does--save in war--has no appreciable consequences for another. There is therefore no common interest, no public, and no need nor possibility of an inclusive state. The plurality of states is such a universal and notorious phenomenon that it is taken for granted. It does not seem to require explanation. But it sets up, as we have noted, a test difficult for some theories to meet. Except upon the basis of a freakish limitation in the common will and reason which is alleged to be the foundation of the state, the difficulty is insuperable. It is peculiar, to say the least, that universal reason should be unable to cross a mountain range and objective will be balked by a river current. The difficulty is not so great for many other theories. But only the theory which makes recognition of consequences the critical factor can find in the fact of many states a corroborating trait. Whatever is a barrier to the spread of the consequences of associated behavior by that very fact operates to set up political boundaries. The explanation is as commonplace as is the thing to be explained. Somewhere between associations that are narrow, close and intimate and those which are so remote as to have only infrequent and casual contact lies, then, the province of a state. We do not find and should not expect to find sharp and fast demarcations. Villages and neighborhoods shade imperceptibly into a political public. Different states may pass through federations and alliances into a larger whole which has some of the marks of statehood. This condition, which we should anticipate in virtue of the theory, is confirmed by historical facts. The wavering and shifting line of distinction between a state and other forms of social union is, again, an obstacle in the way of theories of the state which imply as their concrete counterpart something as sharply marked off as is the concept. On the basis of empirical consequences, it is just the sort of thing which should occur. There are empires due to conquest where political rule exists only in forced levies of taxes and soldiers, and in which, though the word state may be used, the characteristic signs of a public are notable for their absence. There are political communities like the city-states of ancient Greece in which the fiction of common descent is a vital factor, in which household gods and worship are replaced by community divinities, shrines, and cults: states in which much of the intimacy of the vivid and prompt personal touch of the family endures, while there has been added the transforming inspiration of a varied, freer, fuller life, whose issues are so momentous that in comparison the life of the neighborhood is parochial and that of the household dull.