For between this father and son there was yet no real peace, only a truce, and that enduring but so long as the latter respected those marital rights of the former which we found extending over all that was feminine in the horde. The intelligent acceptance by the intruding junior of the sole right of the senior to union with the females of a group, was its _sine qua non_, which the dawn of intellectuality in the race as inevitably imposed as it happily permitted. Such a step in advance as a possible obedience, _ex animo_, to such a law would be immense. Therefrom would issue the vital point of a conception of moral reserves in marital rights as regards the other sex; the germ of a profound and fundamental difference between brute and man. For the first time in the history of the world we encounter the factor which is to be the leading power in future social metamorphosis, i.e. _an explicit distinction between female and female, as such_. The superlative fact, indeed, in relation to our general argument, appears--namely, that certain females are now to become sacred to certain males, and that both (_nota bene_) are members of the same family circle. But what shall be, in such an age, the notes of a law conveying this noble sentiment of sanctity, which, disarming jealousy, could permit peace where before strife reigned? How give the outer expression of the inner feeling, now aroused, of a change in the past intersexual attitude of certain group members? Whence borrow the eloquence which shall ordain rules in restriction of intercourse whilst yet, for Homo Alalus, they must needs be mute in expression.[1] In the primal law alone, as I hope in its portrayal to show, can each condition be comprised and found as such. It will be marked and recognised by a physical trait whose presence is as significant and imperative as it is characteristic of the epoch. For a sentiment of restraint in feeling, whilst articulate speech was yet lacking, could only be expressed by restrictive checks in act and deed, requiring mere visual perception for interpretation--acts we may here note, which, as insulating the individual, would also inevitably tend to consecration.