18. Laws of this kind have often been objected to on the strength of a one-sided view of the function of laws; the view, viz., that its only business is to prevent interference with the liberty of the individual. And this view has gained undue favour on account of the real reforms to which it has led. The laws which it has helped to get rid of were really mischievous, but mischievous for further reasons than those conceived of by the supporters of this theory. Having done its work, the theory now tends to become obstructive, because in fact advancing civilisation brings with it more and more interference with the liberty of the individual to do as he likes, and this theory affords a reason for resisting all positive reforms, all reforms which involve an action of the state in the way of promoting conditions favourable to moral life. It is one thing to say that the state in promoting these conditions must take care not to defeat its true end by narrowing the region within which the spontaneity and disinterestedness of true morality can have play; another thing to say that it has no moral end to serve at all, and that it goes beyond its province when it seeks to do more than secure the individual from violent interference by other individuals. The true ground of objection to 'paternal government' is not that it violates the 'laissez faire' principle and conceives that its office is to make people good, to promote morality, but that it rests on a misconception of morality. The real function of government being to maintain conditions of life in which morality shall be possible, and morality consisting in the disinterested performance of self-imposed duties, 'paternal government' does its best to make it impossible by narrowing the room for the self-imposition of duties and for the play of disinterested motives.
19. The question before us, then, is, In what ways and how far do the main obligations enforced and rights maintained by law in all civilised societies contribute to the moral end described; viz. to establish those conditions of life in which a true, i.e. a disinterested or unselfish morality shall be possible? The answer to this question will be a theory of the 'jus naturae'; i.e. it will explain how far positive law is what it should be, and what is the ground of the duty to obey it; in other words, of political obligation. There are two things from which such a theory must be distinguished. (1) It is not an inquiry into the process by which actual law came to be what it is; nor (2) is it an inquiry how far actual law corresponds to and is derived from the exercise of certain original or natural rights. (1) It is not the former, because the process by which the law of any nation and the law in which civilised nations agree has come to be what it is, has not been determined by reference to that end to which we hold that law ought to be directed and by reference to which we criticise it. That is to say, the process has not been determined by any such conscious reference on the part of the agents in the process. No doubt a desire for social good as distinct from private pleasure, for what is good on the whole as distinct from what is good for the moment, has been a necessary condition of it; but _(a)_, as an agent in the development of law, this has not reached the form of a conception of moral good according to that definition of it by which the value of law is to be estimated; and _(b)_ in bringing law to its present state it has been indistinguishably blended with purely selfish passions and with the simple struggle for existence.