tion. In the simplest societies it seems probable that these ties—reinforced and extended, perhaps, by religious or other beliefs—are the only ones that seriously count. It is certain that of the warp of descent and the woof of intermarriage there is woven a tissue out of which small and rude but close and compact communities are formed. But the ties of kinship and neighbourhood are effective only within narrow limits. While the local group, the clan, or the village community are often the centres of vigorous life, the larger aggregate of the Tribe seldom attains true social and political unity unless it rests upon a military organization. But military organization may serve not only to hold one tribe together but also to hold other tribes in subjection, and thereby, at the cost of much that is most valuable in primitive life, to establish a larger and at the same time a more orderly society. Such an order once established does not, indeed, rest on naked force. The rulers become invested with a sacrosanct authority. It may be that they are gods or descendants of gods. It may be that they are blessed and upheld by an independent priesthood. In either case
