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We may draw the same conclusion, concerning the origin of promises, from the force, which is supposed to invalidate all contracts, and to free us from their obligation. Such a principle is a proof, that promises have no natural obligation, and are mere artificial contrivances for the convenience and advantage of society. If we consider aright of the matter, force is not essentially different from any other motive of hope or fear, which may induce us to engage our word, and lay ourselves under any obligation. A man, dangerously wounded, who promises a competent sum to a surgeon to cure him, would certainly be bound to performance; though the case be not so much different from that of one, who promises a sum to a robber, as to produce so great a difference in our sentiments of morality, if these sentiments were not built entirely on public interest and convenience.
We have now run over the three fundamental laws of nature, that of the stability of possession, of its transference by consent, and of the performance of promises. It is on the strict t observance of those three laws, that the peace and security of human society entirely depend; nor is there any possibility of establishing a good correspondence among men, where these are neglected. Society is absolutely necessary for the well-being of men; and these are as necessary to the support of society. Whatever restraint they may impose on the passions of men, they are the real offspring of those passions, and are only a more artful and more refined way of satisfying them. Nothing is more vigilant and inventive than our passions; and nothing is more obvious, than the convention for the observance of these rules. Nature has, therefore, trusted this affair entirely to the conduct of men, and has not placed in the mind any peculiar original principles, to determine us to a set of actions, into which the other principles of our frame and constitution were sufficient to lead us. And to convince us the more fully of this truth, we may here stop a moment, and from a review of the preceding reasonings may draw some new arguments, to prove that those laws, however necessary, are entirely artificial, and of human invention; and consequently that justice is an artificial, and not a natural virtue.
(1) The first argument I shall make use of is derived from the vulgar definition of justice. Justice is commonly defined to be a constant and perpetual will of giving every one his due. In this definition it is supposed, that there are such things as right and property, independent of justice, and antecedent to it; and that they would have subsisted, though men had never dreamt of practising such a virtue. I have already observed, in a cursory manner, the fallacy of this opinion, and shall here continue to open up a little more distinctly my sentiments on that subject.
I shall begin with observing, that this quality, which we shall call property, is like many of the imaginary qualities of the peripatetic philosophy, and vanishes upon a more accurate inspection into the subject, when considered a-part from our moral sentiments. It is evident property does not consist in any of the sensible qualities of the object. For these may continue invariably the same, while the property changes. Property, therefore, must consist in some relation of the object. But it is not in its relation with regard to other external and inanimate objects. For these may also continue invariably the same, while the property changes. This quality, therefore, consists in the relations of objects to intelligent and rational beings. But it is not the external and corporeal relation, which forms the essence of property. For that relation may be the same betwixt inanimate objects, or with regard to brute creatures; though in those cases it forms no property. It is, therefore, in some internal relation, that the property consists; that is, in some influence, which the external relations of the object have on the mind and actions. Thus the external relation, which we call occupation or first possession, is not of itself imagined to be the property of the object, but only to cause its property. Now it is evident, this external relation causes nothing in external objects, and has only an influence on the mind, by giving us a sense of duty in abstaining from that object, and in restoring it to the first possessor. These actions are properly what we call justice; and consequently it is on that virtue that the nature of property depends, and not the virtue on the property.
If any one, therefore, would assert, that justice is a natural virtue, and injustice a natural vice, he must assert, that abstracting from the nations of property, and right and obligation, a certain conduct and train of actions, in certain external relations of objects, has naturally a moral beauty or deformity, and causes an original pleasure or uneasiness. Thus the restoring a man's goods to him is considered as virtuous, not because nature has annexed a certain sentiment of pleasure to such a conduct, with regard to the property of others, but because she has annexed that sentiment to such a conduct, with regard to those external objects, of which others have had the first or long possession, or which they have received by the consent of those, who have had first or long possession. If nature has given us no such sentiment, there is not, naturally, nor antecedent to human conventions, any such thing as property. Now, though it seems sufficiently evident, in this dry and accurate consideration of the present subject, that nature has annexed no pleasure or sentiment of approbation to such a conduct; yet that I may leave as little room for doubt as possible, I shall subjoin a few more arguments to confirm my opinion.
First, If nature had given us a pleasure of this kind, it would have been as evident and discernible as on every other occasion; nor should we have found any difficulty to perceive, that the consideration of such actions, in such a situation, gives a certain pleasure and sentiment of approbation. We should not have been obliged to have recourse to notions of property in the definition of justice, and at the same time make use of the notions of justice in the definition of property. This deceitful method of reasoning is a plain proof, that there are contained in the subject some obscurities and difficulties, which we are not able to surmount, and which we desire to evade by this artifice.
Secondly, Those rules, by which properties, rights, and obligations are determined, have in them no marks of a natural origin but many of artifice and contrivance. They are too numerous to have proceeded from nature: They are changeable by human laws: And have all of them a direct and evident tendency to public good, and the support, of civil society. This last circumstance is remarkable upon two accounts. First, because, though the cause of the establishment of these laws had been a regard for the public good, as much as the public good is their natural tendency, they would still have been artificial, as being purposely contrived and directed to a certain end. Secondly, because, if men had been endowed with such a strong regard for public good, they would never have restrained themselves by these rules; so that the laws of justice arise from natural principles in a manner still more oblique and artificial. It is self-love which is their real origin; and as the self-love of one person is naturally contrary to that of another, these several interested passions are obliged to adjust themselves after such a manner as to concur in some system of conduct and behaviour. This system, therefore, comprehending the interest of each individual, is of course advantageous to the public; though it be not intended for that purpose by die inventors.
