If we accept such a definition of human progress, if we agree that progress is the duty of society, and that all social institutions are to be measured by it, we may proceed to our second premise. This is not to be ranked with the first in importance: it should be too commonly understood and accepted to be dragged into such a prominent position. But it is not commonly understood and accepted. In fact, it is misunderstood and denied to so general a degree that no apology is needed for insisting on it here. The second premise is this: our enjoyment of a thing does not prove that it is right. Even our love, admiration, and reverence for a thing does not prove that it is right; and, even from an evolutionary point of view, our belief that a thing is “natural” does not prove that it is right. A thing may be right in one stage of evolution which becomes wrong in another. For instance, promiscuity is “natural”; the human animal, like many others, is quite easily inclined thereto. Monogamy is proven right by social evolution: it is the best way to carry on the human race in social relation; but it is not yet as “natural” as could be desired. So, to return to our second premise, which is admittedly rather a large one, to show that any custom or status of ours is “natural” and enjoyable does not prove that it is right. It does not of course prevent its being right. Right things may be enjoyed, may be loved, admired, and reverenced, may even be “natural”; but so may wrong things. Even that subhuman faculty called instinct is only a true guide to conduct when the conditions are present which originally developed that instinct. The instinct that makes a modern house-dog turn around three times before he lies down is not worthy of much admiration to-day, though it served its purpose on the grassy plains and in the leafy hollows where it was formed. If these two premises are granted, that the duty of human life is progress, and that a given condition is not necessarily right because we like it, we may go on. Is our present method of home life, based on the economic dependence of woman in the sex-relation, the best calculated to maintain the individual in health and happiness, and develope in him the higher social faculties? The individual is not maintained in health and happiness,—that is visible to all; and how little he is developed in social relation is shown in the jarring irregularity and wastefulness of our present economic system.