With the increase in population a number of sister gentes arose that again brought forth several daughter gentes. The mother gens was distinguished from these as the phratry. A number of phratries constituted the tribe. So strong was this social organization that it still constituted the unit of military organization in the states of antiquity, when the old gentile constitution had already been abandoned. The tribe was subdivided into several branches, all having a common constitution and in each of which the old gens could be recognized. But as the gentile constitution prohibited intermarriage among remote relatives even on the mother’s side, it undermined its own existence. A social and economic development made the relation of the various gentes to one another more and more complicated, the interdict of marriage between certain groups became untenable and ceased to be observed. While production of the necessities of life was at its lowest stage of development, and destined to satisfy only the simplest demands, the activities of men and women were essentially the same. But with increasing division of labor there resulted not only a diversity of occupations, but a diversity of possessions as well. Fishing, hunting, cattle-breeding and agriculture, and the manufacture of tools and implements, necessitated special knowledge, and these became the special province of the men. Man took the lead along these lines of development and accordingly became master and owner of these new sources of wealth. Increasing population and the desire for an extensive ownership of land for agricultural and pastoral purposes, led to struggles and battles over the possession of such land; it also led to a demand for labor-power. An increase in labor-power meant greater wealth in produce and flock. To procure such labor-power the rape of women was at first resorted to, and then the enslavement of vanquished men, who had formerly been killed. Thus two new elements were introduced into the old gentile constitution that were incompatible with its very nature. Still another factor came into play. The division of labor and the growing demand for tools, implements, weapons, etc., led to a development of handicraft along distinct lines apart from agriculture. A special class of craftsmen arose, whose interests in regard to the ownership and inheritance of property diverged considerably from those of the agricultural class.