Practical Eugenics need not be limited to its philanthropic and legislative aspects. There are other social mechanisms which could be used to encourage the multiplication of the fitter, abler families. In Munich, under the enlightened leadership of Dr. Alfred Ploetz, a society for the study and promotion of social and racial hygiene (Internationale Gesellschaft für Rassen-Hygiene) has made a most excellent and significant beginning. This society is doing much not only to collect data and investigate scientifically problems within its field, but also to spread widely the facts of racial integrity. Its members agree, among other things, to undergo thorough medical examination prior to marriage as to their fitness for that state and agree to abstain from marriage, or at least from parenthood, if found to be unfit. Much can be done by suggestion and suasion regarding the choice of mates and the rearing of large families. When one touches upon this subject he is pretty likely to be met with the objection that the selection of mates is so largely an impulsive, emotional affair that it is quite beyond control. "Marriages," they say, "are made in heaven." But when we consider the number that can scarcely be said to be completed there the statement seems open to some question. As a matter of fact, it is perfectly clear, as Galton, Ellis, and others have shown, that all peoples, from the Kaffir and the Dyak to the Hindu and the modern European or American, are surrounded with restrictions in marriage often of the greatest stringency. And yet, since these are matters of established social custom, even of religious observance, we submit almost without knowing it. That results can be really accomplished in this direction and by this method is clearly shown by the history of the Jewish people, and by the Roman Catholics, among whom there are distinctly fewer divorces and childless marriages than among Protestants. In many countries and communities the organized Church still exercises an immense influence over the whole subject of marriage: the Church could easily become a powerful factor in eugenic practice. Such a control can and should be given eugenic direction by the establishment of a more discriminative attitude, looking toward a reduction in the reproductivity of the dependent or defective as well as to the increased reproductivity of the valuable and able. In all of the discussion of "race suicide" and the value to the State of the large family, how seldom do we hear any mention of quality! To plan the organization and conduct of a State without regulating and controlling the quality of its membership is like adopting plans and elevations for a costly building without making any specifications as to materials.