As the years go on, we may have great hopes that the regarding of psychology as just as much a necessary part of a doctor’s education as biology, or therapeutics will produce a better feeling among medical men in regard to the great question of which the statistics of the birth-rate form the gauge. Doctors will probably understand that harm done to the body and harm done to the soul react upon one another with remorseless certainty, and that there can be no real separation of spirit and matter. And directly this is understood we shall never find medical men recommending and assisting what Dr. Roux calls “sterile love” though some of us could find a very different name for it. The layman unhesitatingly accepts the advice of his physician, and here “private judgment” hardly exists. If a priest tells a certain type of Englishman that Evening Communions spoil and maim our holiest sacrament, and are bad for the soul, he will resent it, and say that he will choose for himself in the matter. Yet if a doctor tells the same person that it is dangerous to eat mushrooms that have been gathered for more than two days, or that the irritation at his wrists is a symptom of uric acid in the blood, there will be no question of disbelief. The influence of doctors is incalculable, they rule us by our fear of death and our instinct of self-preservation, and rarely do we find that they abuse the trust reposed in them, or use their great power for ill always excepting the instance under discussion. When, therefore, the medical profession can be brought to see the preventive check system as it really is, when doctors understand that interference with natural laws induces a deterioration of character and temperament which eventually acts upon the body for its harm, and tends to race-degeneracy, then much will be gained. And when they progress still further in the coming reconciliation of science with the Christian Revelation, and own that the laws of God, set out and promulgated by His Holy Church, are no less binding than the laws made known by the revelation of science, then the battle will be half won. The final victory or defeat will be with the priests and ministers of every church and sect, the men who are the physicians of our souls. The last few pages have been occupied with a statement of the Neo-Malthusian propaganda. I have been careful rather to understate than exaggerate the case. Much that I might have included, corroborative testimony from people who know, individual instances, letters, and so forth, has been rejected for the purposes of this essay. Were I writing another book upon the subject I should have used this material. In a collection of papers devoted to various subjects, and which will have a more general appeal than a work devoted entirely to vital statistics, it is impossible. But any one who has followed me thus far may be sure that I have been strictly temperate in statement.