When, then, it can be shown that sex-distinction in the human race is so excessive as not only to affect injuriously its own purposes, but to check and pervert the progress of the race, it becomes a matter for most serious consideration. Nothing could be more inevitable, however, under our sexuo-economic relation. By the economic dependence of the human female upon the male, the balance of forces is altered. Natural selection no longer checks the action of sexual selection, but co-operates with it. Where both sexes obtain their food through the same exertions, from the same sources, under the same conditions, both sexes are acted upon alike, and developed alike by their environment. Where the two sexes obtain their food under different conditions, and where that difference consists in one of them being fed by the other, then the feeding sex becomes the environment of the fed. Man, in supporting woman, has become her economic environment. Under natural selection, every creature is modified to its environment, developing perforce the qualities needed to obtain its livelihood under that environment. Man, as the feeder of woman, becomes the strongest modifying force in her economic condition. Under sexual selection the human creature is of course modified to its mate, as with all creatures. When the mate becomes also the master, when economic necessity is added to sex-attraction, we have the two great evolutionary forces acting together to the same end; namely, to develope sex-distinction in the human female. For, in her position of economic dependence in the sex-relation, sex-distinction is with her not only a means of attracting a mate, as with all creatures, but a means of getting her livelihood, as is the case with no other creature under heaven. Because of the economic dependence of the human female on her mate, she is modified to sex to an excessive degree. This excessive modification she transmits to her children; and so is steadily implanted in the human constitution the morbid tendency to excess in this relation, which has acted so universally upon us in all ages, in spite of our best efforts to restrain it. It is not the normal sex-tendency, common to all creatures, but an abnormal sex-tendency, produced and maintained by the abnormal economic relation which makes one sex get its living from the other by the exercise of sex-functions. This is the immediate effect upon individuals of the peculiar sexuo-economic relation which obtains among us. III.