The family is a decreasing survival of the earliest grouping known to man. Marriage is an increasing development of high social life, not fully evolved. So far from being identical with the family, it improves and strengthens in inverse ratio to the family, as is easily seen by the broad contrast between the marriage relations of Jacob and the unquenchable demand for lifelong single mating that grows in our hearts to-day. There was no conception of marriage as a personal union for life of two well-matched individuals during the patriarchal era. Wives were valued merely for child-bearing. The family needed numbers of its own blood, especially males; and the man-child was the price of favor to women then. It was but a few degrees beyond the horde, not yet become a tribe in the full sense. Its bonds of union were of the loosest,—merely common paternity, with a miscellaneous maternity of inimical interests. Such a basis forever forbade any high individualization, and high individualization with its demands for a higher marriage forbids any numerical importance to the family. Marriage has risen and developed in social importance as the family has sunk and decreased. It is most interesting to note that, under the comparatively similar conditions of the settlement of Utah, the numerical strength and easily handled common interests of many people under one head, which distinguish the polygamous family, were found useful factors in that great pioneering enterprise. In the further development of society a relation of individuals more fluent, subtle, and extensive was needed. The family as a social unit makes a ponderous body of somewhat irreconcilable constituents, requiring a sort of military rule to make it work at all; and it is only useful while the ends to be attained are of a simple nature, and allow of the slowest accomplishment. It is easy to see the family extending to the tribe by its own physical increase; and, similarly, the father hardening into the chief, under the necessities of larger growth. Then, as the steadily enlarging forces of national unity make the chief an outgrown name and the tribe an outgrown form, the family dwindles to a monogamic basis, as the higher needs of the sex-relation become differentiated from the more primitive economic necessities of the family.