Of course it may be difficult to say what ought to be done. I feel sure that society ought to suppress with relentless energy all those parlours of the astrologists and palmists, of the scientific mediums and spiritualists, of the quacks and prophets. Their announcements by signs or in the public press ought to be stopped, and ought to be treated by the postal department of the government as the advertisements of other fraudulent enterprises are treated. A large rôle in the campaign would have to be played by the newspapers, but their best help would be rendered by negative action, by not publishing anything of a superstitious and mystical type. The most important part of the fight, however, is to recognize the danger clearly, to acknowledge it frankly, and to see with open eyes how alarmingly the evil has grown around us. No one will fancy that any social schemes can be sufficient to bring superstition to an end, any more than any one can expect that the present fight against city vice will forever put a stop to sexual immorality. But that surely cannot be an argument for giving up the battle against the moral perversities of metropolitan life. The fact that we cannot be entirely successful ought still less to be an argument for any leniency with the intellectual perversities and the infectious diseases the germs of which are disseminated in our world of honest culture by the inhabitants of the cultural underworld. IV THOUGHT TRANSFERENCE The harmony and soundness of society depend upon its inner unity of mind. Social organization does not mean only an external fitting together, but an internal equality of mind. Men must understand one another in order to form a social unit, and such understanding certainly means more than using the same words and the same grammar. They must be able to grasp other men's point of view, they must have a common world in which to work, and this demands that they mould the world in the same forms of thought. If one calls green what another calls sour, and one feels as noise what another feels as toothache, they cannot enter into a social group. Yet it is no less confusing and no less antisocial if the world which one sees as a system of causes and effects is to another a realm of capricious, causeless, zigzag happenings. The mental links which join society are threatened if some live with their thoughts in a world of order and natural law, and others in a mystical chaos.