Therefore either the names now used under the ‘class system’ are of unknown original sense; or, human marriage was, from the first, so far, ‘individual’ that our ideas of father, mother, brother, sister, son, daughter, could arise and could find expression in terms that still survive, say, among the Urabunna or other Australians. But while tribal customary laws as to classes, totems, generations, marriage rules, and many other social duties were being evolved; some of the ancient names for father, son, brother, sister, were perhaps taken up and applied to each of the large sets of persons whose customary legal status was _now_ (as groups coalesced into large tribes) on the level of actual fathers, sons, brothers, sisters, and the rest. Obviously, in a primitive group of a male senior, his female mates and children, there could not exist (other groups being, on my theory, strange or hostile) large sets of persons occupying a common legal status, as in modern tribes. The existence of such sets of persons is the result of the later and _tribal_ society, of society in which many groups are reconciled and united in a local tribe. Only in such a tribe, which cannot be primitive, is the classificatory system of naming sets of people necessary. It is only in _tribal_ law that the grades of customary status answering to all the many terms can exist, and tribes with their laws cannot be primitive. Most names for the various grades, therefore, are later than Mr. Darwin’s hypothetical stage of small and perhaps hostile groups; they were, in a few cases, perhaps originally names for such relationships as our own father, mother, son, brother, &c., but in the evolution of tribal customary law, such names have been extended out of their _family_, or fire-circle, into their _tribal_ significance, out of recognised kinship, or close contiguity, into terms including all who have the same status, rights, and duties. SUPPOSED SURVIVALS OF GROUP MARRIAGE