The present edition is addressed to a wider audience, in more civilized countries, and so I have felt free to introduce a number of propositions, not to be found in popular proverbs, that had to be omitted from the original edition. But even so, the book by no means pretends to preach revolutionary doctrines, or even doctrines of any novelty. All I design by it is to set down in more or less plain form certain ideas that practically every civilized man and woman holds in petto, but that have been concealed hitherto by the vast mass of sentimentalities swathing the whole woman question. It is a question of capital importance to all human beings, and it deserves to be discussed honestly and frankly, but there is so much of social reticence, of religious superstition and of mere emotion intermingled with it that most of the enormous literature it has thrown off is hollow and useless. I point for example, to the literature of the subsidiary question of woman suffrage. It fills whole libraries, but nine tenths of it is merely rubbish, for it starts off from assumptions that are obviously untrue and it reaches conclusions that are at war with both logic and the facts. So with the question of sex specifically. I have read, literally, hundreds of volumes upon it, and uncountable numbers of pamphlets, handbills and inflammatory wall-cards, and yet it leaves the primary problem unsolved, which is to say, the problem as to what is to be done about the conflict between the celibacy enforced upon millions by civilization and the appetites implanted in all by God. In the main, it counsels yielding to celibacy, which is exactly as sensible as advising a dog to forget its fleas. Here, as in other fields, I do not presume to offer a remedy of my own. In truth, I am very suspicious of all remedies for the major ills of life, and believe that most of them are incurable. But I at least venture to discuss the matter realistically, and if what I have to say is not sagacious, it is at all events not evasive. This, I hope, is something. Maybe some later investigator will bring a better illumination to the subject.