A prohibition may perhaps have arisen very early, even if Mr. Atkinson’s hypothesis (that the rule of marriage outside the group arose in a state of brutality) be rejected. ‘The origin of bars to marry is, in fact, complex,’ writes Mr. Crawley. A dislike of marriage with a group-mate, familiar, through contiguity, from infancy, may have been developed among early men;[30] and may have been reinforced by the probably later superstitions which create ‘sexual tabu,’ and mutual avoidance, among many existing peoples. Men and women are, by savages, conceived to be mysteriously perilous to each other, especially when they live in close contiguity. Mr. Crawley also allows for Mr. Atkinson’s main factor, jealousy, ‘proprietary feeling, which is one crude means by which the family has been regulated and maintained.’[31] If these things were so (whether we go back to Mr. Atkinson’s semi-brutal ancestors, or not), then, contrary to Mr. Donald McLennan’s opinion, and to general opinion, it would not ‘appear to be possible to demonstrate that Totemism preceded exogamy,’ or at least preceded the exogamous tendency. For, in the first place, exogamy might conceivably tend to arise before the explicit idea of kinship--whether male or female--arose. Mr. Atkinson’s ‘primal law’ would be unuttered in speech (speech, by his theory, there was none), but would amount to this: ‘I, the patriarchal bull of this herd, will do my best to kill you, the adult young bulls, if you make any approaches to any of the cows in this crowd.’ There is no notion of ‘incest,’ but there is jealousy producing the germ exogamy. The young bulls must find mates outside of the local herd--or do without. This rule persisted, on Mr. Atkinson’s theory, till the hypothetical anthropoid became a man, and named his group (or had it named for him, as I later suggest) by a totem name. But real human and speaking beings might enforce marriage outside of the group, though they did not perhaps think explicitly of kindred (or, at least, did not think the idea fully out), still less of ‘incest,’ as sin. Mr. McLennan’s theory, as given in his works, was partly identical with that of Mr. Atkinson. ‘The earliest human groups can have had no _idea_ of kinship’--they must, therefore, have been rather low savages. ‘But,’ he said, ‘they were held together by a _feeling_ of kinship,’ not yet risen into explicit consciousness. Cat and kitten have, probably, _feeling_ of kinship, and that _feeling_ is very strong, while it lasts, in the maternal cat, while between semi-human mothers and children, arriving so very slowly at maturity, mother-kin must have been consciously realised very early. Mr. McLennan then showed the stages by which the savage would gradually, by reflection, reach explicit consciousness of female kinship, of mother-relationship, sister and brother relationship, and all the degrees of _female_ kin.