I do not find it easy to accept any single principle that is obvious and straightforward as applicable to the very complex problems we encounter in this realm. Neither the fact that a mode of conduct may be harmful in excess, nor the fact that, whether harmful or no, society dislikes it, seems to me in itself a just ground for its suppression by the law. The first case seems to me one for safeguards against excess; care, for instance, may be taken to see to it that it is manufactured at a limited strength, is sold only under careful restrictions, and so on. The second case I find it impossible to decide as a general principle, and apart from particular cases each of which is judged upon its own merits. I am prepared, for example, to make it illegal to keep a gaming-house; but I am not prepared to legislate against a social game of bridge played for money in a private house. Conduct must be punished or prohibited when it is harmful in itself or in the excess in which it touches society before we ought to seek access to the clumsy machinery of the law. For we cannot suppress all modes of conduct in which excess does harm. In most cases, we have to leave the individual free to judge at what point excess is a fact. Over-eating does great harm, but no one would propose legislation against over-eating. Many motorists sacrifice their lives to their motor-car, especially in America; but no one would propose legislation against an undue indulgence in motoring. False social standards result from our excessive adulation of film-stars and athletes; but we should obviously be merely foolish if we legislated against the publicity which makes for that excessive adulation. We have always, I think, to study any proposed social prohibition in terms of the object to which it is applied. We have to remember that it always runs the risk of undermining character by a limitation of responsibility. Men are made not by being safeguarded against temptation but by being able to triumph over it. It would be impossible to forbid the use of cheques because some people succumb to the habit of embezzlement. There is a clear case for forbidding the sale of noxious drugs like heroin or cocaine except under severe restrictions, because it is clear that in themselves their consumption is bound to harm the recipient. There is a clear case for insisting that persons, even if they be passionate Christian Scientists, who are suffering from an infectious disease like small-pox, shall be isolated until they are cured; for anyone who goes about with small-pox inflicts direct and measurable injury on other persons. But unless we can show that the particular mode of conduct it is proposed to repress must necessarily destroy the will-power of those who practise it, as is true of noxious drugs, or directly and unquestionably injures the rest of society in a measurable way, I think the method of prohibition an unwarranted interference with freedom.