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498 had experience enough to observe, that whatever may be the consequence of any single act of justice, perform'd by a single person, yet the whole system of actions, concurr'd in by the whole society, is infinitely advantageous to the whole, and to every part; it is not long before justice and property take place. Every member of society is sensible of this interest: Every one expresses this sense to his fellows, along with the resolution he has taken of squaring his actions by it, on condition that others will do the same. No more is requisite to induce any one of them to perform an act of justice, who has the first opportunity. This becomes an example to others. And thus justice establishes itself by a kind of convention or agreement; that is, by a sense of interest, suppos'd to be common to all, and where every single act is perform'd in expectation that others are to perform the like. Without such a convention, no one wou'd ever have dream'd, that there was such a virtue as justice, or have been induc'd to conform his actions to it. Taking any single act, my justice may be pernicious in every respect; and 'tis only upon the supposition, that others are to imitate my example, that I can be induc'd to embrace that virtue; since nothing but this combination can render justice advantageous, or afford me any motives to conform my self to its rules.

We come now to the second question we propos'd, viz. Why we annex the idea of virtue to justice, and of vice to injustice. This question will not detain us long after the principles, which we have already establish'd. All we can say of it at present will be dispatch'd in a few words: And for farther satisfaction, the reader must wait till we come to the third part of this book. The natural obligation to justice, viz. interest, has been fully explain'd; but as to the moral obligation, or the sentiment of right and wrong, 'twill first be requisite to examine the natural virtues, before we can give a full and satisfactory account of it.

After men have found by experience, that their selfishness