All these effects of custom and fashion, however, upon the moral sentiments of mankind, are inconsiderable in comparison of those which they give occasion to in some other cases; and it is not concerning the general style of character and behaviour, that those principles produce the greatest perversion of judgment, but concerning the propriety or impropriety of particular usages.
The different manners which custom teaches us to approve of in the different professions and states of life, do not concern things of the greatest importance. We expect truth and justice from an old man as well as from a young, from a clergyman as well as from an officer; and it is in matters of small moment only that we look for the distinguishing marks of their respective characters. With regard to these too, there is often some unobserved circumstance which, if it was attended to, would show us, that, independent of custom, there was a propriety in the character which custom had taught us to allot to each profession. We cannot complain, therefore, in this case, that the perversion of natural sentiment is very great. Though the manners of different nations require different degrees of the same quality, in the character which they think worthy of esteem, yet the worst that can be said to happen even here, is that the duties of one virtue are sometimes extended so as to encroach a little upon the precincts of some other. The rustic hospitality that is in fashion among the Poles encroaches, perhaps, a little upon œconomy and good order; and the frugality that is esteemed in Holland, upon generosity and good-fellowship. The hardiness demanded of savages diminishes their humanity; and, perhaps, the delicate sensibility required in civilized nations sometimes destroys the masculine firmness of the character. In general, the style of manners which takes place in any nation, may commonly upon the whole be said to be that which is most suitable to its situation. Hardiness is the character most suitable to the circumstances of a savage; sensibility to those of one who lives in a very civilized society. Even here, therefore, we cannot complain that the moral sentiments of men are very grossly perverted.
It is not therefore in the general style of conduct or behaviour that custom authorizes the widest departure from what is the natural propriety of action. With regard to particular usages its influence is often much more destructive of good morals, and it is capable of establishing, as lawful and blameless, particular actions, which shock the plainest principles of right and wrong.
Can there be greater barbarity, for example, than to hurt an infant? Its helplessness, its innocence, its amiableness, call forth the compassion even of an enemy, and not to spare that tender age is regarded as the most furious effort of an enraged and cruel conqueror. What then should we imagine must be the heart of a parent who could injure that weakness which even a furious enemy is afraid to violate? Yet the exposition, that is, the murder of newborn infants, was a practice allowed of in almost all the states of Greece, even among the polite and civilized Athenians; and whenever the circumstances of the parent rendered it inconvenient to bring up the child, to abandon it to hunger, or to wild beasts, was regarded without blame or censure. This practice had probably begun in times of the most savage barbarity. The imaginations of men had been first made familiar with it in that earliest period of society, and the uniform continuance of the custom had hindered them afterwards from perceiving its enormity. We find, at this day, that this practice prevails among all savage nations; and in that rudest and lowest state of society it is undoubtedly more pardonable than in any other. The extreme indigence of a savage is often such that he himself is frequently exposed to the greatest extremity of hunger, he often dies of pure want, and it is frequently impossible for him to support both himself and his child. We cannot wonder, therefore, that in this case he should abandon it. One who in flying from an enemy, whom it was impossible to resist, should throw down his infant, because it retarded his flight, would surely be excusable; since, by attempting to save it, he could only hope for the consolation of dying with it. That in this state of society, therefore, a parent should be allowed to judge whether he can bring up his child, ought not to surprise us so greatly. In the latter ages of Greece, however, the same thing was permitted from views of remote interest or conveniency, which could by no means excuse it. Uninterrupted custom had by this time so thoroughly authorized the practice, that not only the loose maxims of the world tolerated this barbarous prerogative, but even the doctrine of philosophers, which ought to have been more just and accurate, was led away by the established custom, and upon this, as upon many other occasions, instead of censuring, supported the horrible abuse, by far-fetched considerations of public utility. Aristotle talks of it as of what the magistrate ought upon many occasions to encourage. The humane Plato is of the same opinion, and, with all that love of mankind which seems to animate all his writings, no where marks this practice with disapprobation. When custom can give sanction to so dreadful a violation of humanity, we may well imagine that there is scarce any particular practice so gross which it cannot authorize. Such a thing, we hear men every day saying, is commonly done, and they seem to think this a sufficient apology for what, in itself, is the most unjust and unreasonable conduct.
There is an obvious reason why custom should never pervert our sentiments with regard to the general style and character of conduct and behaviour, in the same degree as with regard to the propriety or unlawfulness of particular usages. There never can be any such custom. No society could subsist a moment, in which the usual strain of mens conduct and behaviour was of a piece with the horrible practice I just now mentioned.
PART VI.
Of Systems of Moral Philosophy.
CONSISTING OF FOUR SECTIONS.
SECTION I.
Of the questions which ought to be examined in a theory of moral sentiments.
If we examine the most celebrated and remarkable of the different theories which have been given concerning the nature and origin of our moral sentiments, we shall find that almost all of them coincide with some part or other of that which I have been endeavouring to give an account of; and that if every thing which has already been said be fully considered, we shall be at no loss to explain what was the view or aspect of nature which led each particular author to form his particular system. From some one or other of those principles which I have been endeavouring to unfold, every system of morality that ever had any reputation in the world has, perhaps, ultimately been derived. As they are all of them, in this respect, founded upon natural principles, they are all of them in some measure in the right. But as many of them are derived from a partial and imperfect view of nature, there are many of them too in some respects in the wrong.