Birth Control is no negative philosophy concerned solely with the number of children brought into this world. It is not merely a question of population. Primarily it is the instrument of liberation and of human development. It points the way to a morality in which sexual expression and human development will not be in conflict with the interest and well-being of the race nor of contemporary society at large. Not only is it the most effective, in fact the only lever by which the value of the child can be raised to a civilized point; but it is likewise the only method by which the life of the individual can be deepened and strengthened, by which an inner peace and security and beauty may be substituted for the inner conflict that is at present so fatal to self-expression and self-realization. Sublimation of the sexual instinct cannot take place by denying it expression, nor by reducing it to the plane of the purely physiological. Sexual experience, to be of contributory value, must be integrated and assimilated. Asceticism defeats its own purpose because it develops the obsession of licentious and obscene thoughts, the victim alternating between temporary victory over "sin" and the remorse of defeat. But the seeker of purely physical pleasure, the libertine or the average sensualist, is no less a pathological case, living as one-sided and unbalanced a life as the ascetic, for his conduct is likewise based on ignorance and lack of understanding. In seeking pleasure without the exercise of responsibility, in trying to get something for nothing, he is not merely cheating others but himself as well. In still another field science and scientific method now emphasize the pivotal importance of Birth Control. The Binet-Simon intelligence tests which have been developed, expanded, and applied to large groups of children and adults present positive statistical data concerning the mental equipment of the type of children brought into the world under the influence of indiscriminate fecundity and of those fortunate children who have been brought into the world because they are wanted, the children of conscious, voluntary procreation, well nourished, properly clothed, the recipients of all that proper care and love can accomplish. In considering the data furnished by these intelligence tests we should remember several factors that should be taken into consideration. Irrespective of other considerations, children who are underfed, undernourished, crowded into badly ventilated and unsanitary homes and chronically hungry cannot be expected to attain the mental development of children upon whom every advantage of intelligent and scientific care is bestowed. Furthermore, public school methods of dealing with children, the course of studies prescribed, may quite completely fail to awaken and develop the intelligence.