If, then, the first steps--and, generally speaking, the most important steps--are discovered in the unphysiological marriage and its influence upon the bearing and rearing of progeny, then it is obvious enough that prevention of incurable insanity should begin with giving adequate attention to this phase of the subject, and this first and emphatically. Already the law says that certain peculiarly afflicted individuals can not marry; and probably this is about as far as the law can helpfully go until, at least, public intelligence as well as private sentiment will sustain it in going further. So we must look to these latter--a widespread intelligence and a corresponding earnest sentiment founded upon such intelligence--for the means of making progress toward the prevention of insanity. But how can this needed knowledge and helpful sentiment come to be? Certainly not by perpetuating the present notions of so-called "modesty" and "purity," which, as now held, must always interfere with the study and practice necessary for ascertaining the truth, and for applying it to the needs of race-building. The time ought to come soon, very soon, when matters of such serious content shall not be so absolutely subject to the dominance of conventionality and guesswork and recklessness as now, but shall instead be subject to the sway of accurate science and its careful adaptation to human conditions. Every marriage now is at best but an experiment--blind and chance-taking often, in a most wasteful and dangerous sense. Let it remain, if it must, an experiment still, but one which shall be henceforth conducted with such foresight and skill, and withal with such intelligent purpose, as shall certainly point to improved results from generation to generation. Experience shows that it is comparatively easy to ascertain what marriages, generally speaking, are prone to result in obviously vitiated progeny; or if not in these, then, to some extent at least, in the progeny which, being unnaturally constituted, are prone to develop their weaker strands of personality, and so to break down in the end. But to this course neither prudery nor superstition nor selfishness will ever assent; it must be pursued in spite of these, and by the only method which science now recognizes--namely, accurate observation, careful record, and the most comprehensive, skillful comparison, all in order that truthful inductions may be finally secured. That parents should train up their children to look forward to marriage not as the acme of personal indulgence and satisfaction, but as a most responsible partnership for the developmental keeping of unborn fortunes, and the proper nurturing of the children that may come to them, is no longer speculation, but a science-founded fact. Undoubtedly the highest state of adult satisfaction will always be closely associated with what may be characterized as child completion. Moreover, that an educational