"The man whose tongue is constricted by laws or taboos against free speech, whose pen is constricted by the censorship, whose loves are constricted by an ethic which considers jealousy a better thing than affection, whose childhood has been imprisoned in a code of manners and whose youth has been drilled in a cruel orthodoxy, will feel against the world that hampers him the same rage that is felt by the infant whose arms and legs are held motionless. In his rage he will turn to destruction, becoming a revolutionary, a militarist, or a persecuting moralist according to temperament and opportunity. To make human beings who will create a better world is a problem in emotional psychology: it is the problem of making human beings who have a free intelligence combined with a happy disposition. This problem is not beyond the powers of science; it is the will, not the power, that is lacking."