In certain directions doubtless the tendency has been to push this uniformity too far, especially with reference to governmental institutions. Mr. Morgan’s assertions upon this subject were too sweeping. Nevertheless he was the first to point out clearly that ancient American society was founded, not upon the family, but upon the gens, totem or clan, as the social unit.[48] The gens is “an organized body of consanguineal kindred” (Powell), either such in reality, or, when strangers have been adopted, so considered by the tribal conscience. Its members dwell together in one house or quarter, and are obliged to assist each other. An indeterminate number of these gentes, make up the tribe, and smaller groups of several of them may form “phratries,” or brotherhoods, usually for some religious purpose. Each gens is to a large extent autonomic, electing its own chieftain, and deciding on all questions of property and especially of blood-revenge, within its own limits. The tribe is governed by a council, the members of which belong to and represent the various gentes. The tribal chief is elected by this council, and can be deposed at its will. His power is strictly limited by the vote of the council, and is confined to affairs of peace. For war, a “war chief” is elected also by the council, who takes sole command. Marriage within the gens is strictly prohibited, and descent is traced and property descends in the female line only. This is the ideal theory of the American tribal organization, and we may recognize its outlines almost anywhere on the continent; but scarcely anywhere shall we find it perfectly carried out. The gentile system is by no means universal, as I shall have occasion to point out; where it exists, it is often traced in the male line; both property and dignities may be inherited directly from the father; consanguine marriage, even that of brother and sister or father and daughter, though rare, is far from unexampled.[49] In fact, no one element of the system was uniformly respected, and it is an error of theorists to try to make it appear so. It varied widely in the same stock and in all its expressions.[50] This is markedly true, for instance, in domestic architecture. The Lenâpé, who were next neighbors to the Five Nations, had nothing resembling their “long house,” on which Morgan founded his scheme of communal tenements; and the efforts which some later writers have made to identify the large architectural works of Mexico and Yucatan with the communal pueblos of the Gila valley will not bear the test of criticism.