acting alike in its own self-defence and for the interests of its individual members. It is not necessary for the safety and progress of society that “unfit” children should die, it is necessary that they should not be born, and ultimately the society which prospers most in the character of its members will be the one which best fulfils this preventive duty.
Yet, when Professor Pearson passes from a society of individuals to the society of nations, which we call humanity, he insists upon retaining the older, cruder, irrational method of securing progress, the primitive struggle for physical existence. Why? If it is profitable and consistent with progress to put down the primitive struggle for life among individuals with one another, the family and tribal feuds which survive even in fairly developed societies, and to enlarge the area of social internal peace until it covers a whole nation, may we not go farther and seek, with hope, to substitute international peace and co-operation, first among the more civilised and more nearly related nations, and finally throughout the complete society of the human race? If progress is helped by substituting rational selection for the struggle for life within small groups, and afterwards within the larger national groups, why may we not extend the same mode of progress to a federation of European States, and finally to a world-federation? I am not now concerned with the grave practical difficulties besetting such an achievement, but with the scientific theory.
Although a certain sort of individual efficiency is sacrificed by repressing private war within a tribe or nation, it is rightly judged that the gain in tribal or national unity and efficiency outweighs that loss. May not a similar biological and rational economy be subserved by substituting government for anarchy among nations? We admit that a nation is strengthened by putting down internecine tribal warfare; what finality attaches to the arbitrary social group we term a “nation” which obliges us to reverse the economy applicable to tribes when we come to deal with nations?