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What, then, is the explanation which the student of human evolution has to offer as a final purpose for man’s existence? It is not, as the Victorian scientists thought, to permit the individual man or woman to develop his latent potentialities; but to permit a closed society, be it tribe or nation, to develop its collective potentialities of brain and of body as an evolutionary unit. It is only when we make the assumption that evolution aims at the production of societies – not of individuals that we come by a satisfying explanation of man’s dual mentality, and the constituent elements of human nature.”