The intellectual trouble in the matter, as it presents itself to me, comes in upon this, that the question does not lie in one plane. So many discussions ignore this fact, and deal with it on one plane only. For example, we may take the whole business on the plane of the medical man, ignoring all other considerations. On that plane it would probably be almost easy to reason out a working system. It never has been done by the medical profession, as a whole, which is fairly understandable, or by any group of medical men, which is the more surprising, but it would be an extremely interesting thing to have done and a material contribution to the sane discussion of this problem. It would not solve it but it would illuminate certain aspects. Let the mere physiological problem be taken. We want healthy children and the best we can get. Let the medical man devise his scheme primarily for that. Understand we are shutting our eyes to every other consideration but physical or quasi-physical ones. Imagine the thing done, for example, by a Mr. Francis Galton, who had an absolutely open mind upon all other questions. Some form of polygamy, marriage of the most transient description, with reproduction barred to specified types, would probably come from such a speculation. But, in addition, a number of people who can have only a few children or none are, nevertheless, not adapted physiologically for celibacy. Conceive the medical man working that problem out upon purely materialistic lines and with an eye to all physiological and pathological peculiarities. The Tasmanians (now extinct) seem to have been somewhere near the probable result. Then let us take one step up to a second stage of consideration, remaining still materialistic, and with the medical man still as our only guide. We want the children to grow up healthy; we want them to be taken care of. This means homes, homes of some sort. That may not abolish polygamy, but it will qualify it, it will certainly abolish any approach to promiscuity that was possible at the lowest stage, it will enhance the importance of motherhood and impose a number of limits upon the sexual freedoms of men and women. People who have become parents, at any rate, must be tied to the children and one another. We come at once to much more definite marriage, to an organized family of some sort, be it only Plato’s state community or something after the Oneida pattern, but with at least a system of guarantees and responsibilities. Let us add that we want the children to go through a serious educational process, and we find at once still further limitations coming in. We discover the necessity of deferring experience, of pushing back adolescence, of avoiding precocious stimulation with its consequent arrest of growth. We are already face to face with an enlarged case for decency, for a system of suppressions and of complicated Taboos.