development is premised at least by certain recent studies, especially those of Hodge on the influence of fatigue, and of Van Gieson on the effects of exhaustion and intoxication upon the nervous elements. (See also Peterson, op. cit.) In no sense can parents be said to live for themselves chiefly. Always the influence of their own health, happiness, and prosperity upon their children should be remembered, and should be made as constructive as possible. That this can be consciously attempted with commensurate results is more or less evidenced not only by common observation but by investigation. Not, however, in the sense that parents are always able to endow children with some particular, much-wished-for characteristic, as so many suppose—for it must be remembered that perhaps pretty fixed tendencies for several generations may have to be overcome and reversed before such special results can be obtained, but in the much better sense of giving such an impetus healthward and strengthward and lifeward as may later on be the beginning of a constitutional foundation that shall support many generations of full health and longevity.
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
