Thus, the primary notion of the totem birth of children would, when blood kinship and descent became a consciously accepted element in social development, easily slide into the belief of a totemic ancestor and kinship with the totem; the protection and assistance afforded by the totem to the women of the primary groups who became the mothers of new generations, would easily grow into a sort of worship of the totem; the adoption of the totem name from the circumstances of birth implying the origin of the name from within the group and not from without would, as aggregation took the place of segregation, give way before the association of groups of persons with common interests; the aggregate totem name would come to the separate local totems as soon as, but not before, aggregation had taken the place of segregation in the formation of the social system, and this was not at the earliest stage; the close association of the totems with groups of mothers who always took the fathers of their children from without the mother group, would readily develop into differentiating the mother totems within the group from the totems of the fathers without the group, and this differentiation would produce a special relationship between the sexes based upon the difference of totems instead of upon the sameness of them; and finally there would be produced first a two-class division founded on sex--all the mothers and all the fathers--and, only in a developed form, a two-class division founded on the accepted totem name. If this is a probable view of the course of totemic evolution, we may more confidently refer to its final stages for further evidence. Advanced totemic society shows a constant tendency to substitute blood kinship for the association with natural objects: first, blood kinship with the mother, then with the mother and the father, finally recognised through the father only. At this last stage, blood kinship has practically succeeded in expelling totemic association altogether in favour of tribal kinship by blood descent, for totemism with male descent as the basis of the social group is totemism in name only; the names of totemism remain but they are applied to kinship tribes or sections of tribes, and they do duty therefore as a convenient name-system without reference to their origin in definite association with the naming animal or plant; and it is already in position to surrender also the names and outward signs. Blood kinship is therefore the destroyer, not the generator, of totemism, and we are therefore compelled to get at the back of blood kinship if we want to find totem beginnings.