A function may be defined as an activity which embodies and expresses the idea of social purpose. The essence of it is that the agent does not perform it merely for personal gain or to gratify himself, but recognizes that he is responsible for its discharge to some higher authority. The purpose of industry is obvious. It is to supply man with things which are necessary, useful or beautiful, and thus to bring life to body or spirit. In so far as it is governed by this end, it is among the most important of human activities. In so far as it is diverted from it, it may be harmless, amusing, or even exhilarating to those who carry it on, but it possesses no more social significance than the orderly business of ants and bees, the strutting of peacocks, or the struggles of carnivorous animals over carrion. Men have normally appreciated this fact, however unwilling or unable they may have been to act upon it; and therefore from time to time, in so far as they have been able to control the forces of violence and greed, they have adopted various expedients for emphasizing the social quality of economic activity. It is not easy, however, to emphasize it effectively, because to do so requires a constant effort of will, against which egotistical instincts are in rebellion, and because, if that will is to prevail, it must be embodied in some social {9} and political organization, which may itself become so arbitrary, tyrannical and corrupt as to thwart the performance of function instead of promoting it. When this process of degeneration has gone far, as in most European countries it had by the middle of the eighteenth century, the indispensable thing is to break the dead organization up and to clear the ground. In the course of doing so, the individual is emancipated and his rights are enlarged; but the idea of social purpose is discredited by the discredit justly attaching to the obsolete order in which it is embodied.