The development of distinct branches of humanity has already brought about such a severance between races and classes which are in totally distinct stages of evolution. So wide is the hiatus between them often, that the lowest form of sex attraction can hardly cross it; and the more highly developed mental and emotional sex passion cannot possibly bridge it. In the world of sex, kind seeks kind, and too wide a dissimilarity completely bars the existence of the highest forms of sex emotion, and often even the lower and more purely animal. Were it possible to place a company of the most highly evolved human females--George Sands, Sophia Kovalevskys, or even the average cultured females of a highly evolved race--on an island where the only males were savages of the Fugean type, who should meet them on the shores with matted hair and prognathous jaws, and with wild shouts, brandishing their implements of death, to greet and welcome them, it is an undoubted fact that, so great would be the horror felt by the females towards them, that not only would the race become extinct, but if it depended for its continuance on any approach to sex affection on the part of the women, that death would certainly be accepted by all, as the lesser of two evils. Hardly less marked would be the sexual division if, in place of cultured and developed females, we imagine males of the same highly evolved class thrown into contact with the lowest form of primitive females. A Darwin, a Schiller, a Keats, though all men capable of the strongest sex emotion and of the most durable sex affections, would probably be untouched by any emotion but horror, cast into the company of a circle of Bushmen females with greased bodies and twinkling eyes, devouring the raw entrails of slaughtered beasts.