Those who have undertaken to prove that all our morality is a product of experience, have not shrunk from this task, and have boldly entered upon the one path that was open to them. The notion of there being any such feeling as an original sense of obligation distinct from the anticipation of pleasure or pain, they treat as a mere illusion of the imagination. All that is meant by saying we ought to do an action is, that if we do not do it, we shall suffer. A desire to obtain happiness and to avoid pain is the only possible motive to action. The reason, and the only reason, why we should perform virtuous actions, or in other words, seek the good of others, is that on the whole such a course will bring us the greatest amount of happiness. We have here then a general statement of the doctrine which bases morals upon experience. If we ask what constitutes virtuous, and what vicious actions, we are told that the first are those which increase the happiness or diminish the pains of mankind; and the second are those which have the opposite effect. If we ask what is the motive to virtue, we are told that it is an enlightened self-interest. The words happiness, utility, and interest include, however, many different kinds of enjoyment, and have given rise to many different modifications of the theory. Perhaps the lowest and most repulsive form of this theory is that which was propounded by Mandeville, in his “Enquiry into the Origin of Moral Virtue.”(2) According to this writer, virtue sprang in the first instance from the cunning of rulers. These, in order to govern men, found it necessary to persuade them that it was a noble thing to restrain, instead of indulging their passions, and to devote themselves entirely to the good of the community. The manner in which they attained this end was by acting upon the feeling of vanity. They persuaded men that human nature was something nobler than the nature of animals, and that devotion to the community rendered a man pre-eminently great. By statues, and titles, and honours; by continually extolling such men as Regulus or Decius; by representing those who were addicted to useless enjoyments as a low and despicable class, they at last so inflamed the vanity of men as to kindle an intense emulation, and inspire the most heroic actions. And soon new influences came into play. Men who began by restraining their passions, in order to acquire the pleasure of the esteem of others, found that this restraint saved them from many painful consequences that would have naturally ensued from over-indulgence, and this discovery became a new motive to virtue. Each member of the community moreover found that he himself derived benefit from the self-sacrifice of others, and also that when he was seeking his own interest, without regard to others, no persons stood so much in his way as those who were similarly employed, and he had thus a double reason for diffusing abroad the notion of the excellence of self-sacrifice.