"On the other hand, collective efficiency has no meaning, it serves no purpose apart from the amelioration of individual life and the development of individual personality.
"So long as groups fear one another and fight with one another the restrictions upon individual liberty must be extreme in the interests of the collective fighting efficiency of each group as a whole.
"All the possibilities of personal development, of individual freedom, are involved in the larger possibilities of friendly relations between nation and nation.
"Already the co-operative instinct has so grown that if war and the fear of war could be eliminated, mankind would have relatively little difficulty in working out ways and means of combining Governmental action with individual initiative for purposes of economic production, education, the promotion of the public health, and the administration of justice.
"All those principles and rules which we call Morality are, in fact, mere rules of the game of life. We play the game or do not play it; we are fair or unfair.
"On the whole, most of us try to be fair because it has been found that playing the game with a sense of fairness is the only way in which we can succeed in working together for common ends without the necessity of imposing upon ourselves coercive rules to hold our organization together for possible mass attack upon the end in view.
"Social life, in this sense of playing the game fairly, has made man the superior of the brutes he sprang from. There is nothing mysterious or recondite about it.
"In order to work together men must understand one another. Therefore, natural selection has picked out the intelligent for survival in the social world; and in order to work together intelligent men must depend on one another, abiding by their covenants.
"Therefore, again, natural selection has picked out what we call Morality for survival in the social world. The whole further progress of mankind would seem to hang upon the possibility that we can find a way to limit and, if possible, to terminate wars between nations, for only in that contingency can we hope to develop a social system in which a supreme efficiency with a maximum of individual liberty can be combined upon a working basis."