It may be here premised that all forms of government are reducible to two general plans, using the word plan in its scientific sense. In their bases the two are fundamentally distinct. The first, in the order of time, is founded upon persons, and upon relations purely personal, and may be distinguished as a society (_societas_). The gens is the unit of this organization; giving as the successive stages of integration, in the archaic period, the gens, the phratry, the tribe and the confederacy of tribes, which constituted a people or nation (_populus_). At a later period a coalescence of tribes in the same area into a nation took the place of a confederacy of tribes occupying independent areas. Such, through prolonged ages, after the gens appeared, was the substantially universal organization of ancient society; and it remained among the Greeks and Romans after civilization supervened. The second is founded upon territory and upon property, and may be distinguished as a state (_civitas_). The township or ward, circumscribed by metes and bounds, with the property it contains, is the basis or unit of the latter, and political society is the result. Political society is organized upon territorial areas, and deals with property as well as with persons through territorial relations. The successive stages of integration are the township or ward, which is the unit of organization; the county or province, which is an aggregation of townships or wards; and the national domain or territory, which is an aggregation of counties or provinces; the people of each of which are organized into a body politic. It taxed the Greeks and Romans to the extent of their capacities, after they had gained civilization, to invent the deme or township and the city ward; and thus inaugurate the second great plan of government, which remains among civilized nations to the present hour. In ancient society this territorial plan was unknown. When it came in it fixed the boundary line between ancient and modern society, as the distinction will be recognized in these pages. It may be further observed that the domestic institutions of the barbarous, and even of the savage ancestors of mankind, are still exemplified in portions of the human family with such completeness that, with the exception of the strictly primitive period, the several stages of this progress are tolerably well preserved. They are seen in the organization of society upon the basis of sex, then upon the basis of kin, and finally upon the basis of territory; through the successive forms of marriage and of the family, with the systems of consanguinity thereby created; through house life and architecture; and through progress in usages with respect to the ownership and inheritance of property.