What then is the reason of this arbitrary inclusion and exclusion? Why should a conception of Kinship, so elastic as to include strangers brought into the family by adoption, be nevertheless so narrow as to shut out the descendants of a female member? To solve these questions, we must recur to the Patria Potestas. The foundation of Agnation is not the marriage of Father and Mother, but the authority of the Father. All persons are Agnatically connected together who are under the same Paternal Power, or who have been under it, or who might have been under it if their lineal ancestor had lived long enough to exercise his empire. In truth, in the primitive view, Relationship is exactly limited by Patria Potestas. Where the Potestas begins, Kinship begins; and therefore adoptive relatives are among the kindred. Where the Potestas ends, Kinship ends; so that a son emancipated by his father loses all rights of Agnation. And here we have the reason why the descendants of females are outside the limits of archaic kinship. If a woman died unmarried, she could have no legitimate descendants. If she married, her children fell under the Patria Potestas, not of her Father, but of her Husband, and thus were lost to her own family. It is obvious that the organisation of primitive societies would have been confounded, if men had called themselves relatives of their mother's relatives. The inference would have been that a per-
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