To see whether the sense of justice can be explained on grounds of Utility, the author begins by surveying in the concrete the things usually denominated just. In the first place, it is commonly considered unjust to deprive any one of their personal liberty, or property, or anything secured to them by law: in other words, it is unjust to violate any one's legal rights. Secondly, The legal rights of a man may be such as ought not to have belonged to him; that is, the law conferring those rights may be a bad law. When a law is bad, opinions will differ as to the justice or injustice of infringing it; some think that no law should be disobeyed by the individual citizen; others hold that it is just to resist unjust laws. It is thus admitted by all that there is such a thing as moral right, the refusal of which is injustice. Thirdly, it is considered just that each person should receive what he deserves (whether good or evil). And a person is understood to deserve good if he does right, evil if he does wrong; and in particular to deserve good in return for good, and evil in return for evil. Fourthly, it is unjust to break faith, to violate an engagement, or disappoint expectations knowingly and voluntarily raised. Like other obligations, this is not absolute, but may be overruled by some still stronger demand of justice on the other side. Fifthly, it is inconsistent with justice to be partial; to show favour or preference in matters where favour does not apply. We are expected in certain cases to prefer our friends to strangers; but a tribunal is bound to the strictest impartiality; rewards and punishments should be administered impartially; so likewise the patronage of important public offices. Nearly allied to impartiality is the idea of equality. The justice of giving equal protection to the rights of all is maintained even when the rights themselves are very unequal, as in slavery and in the system of ranks or castes. There are the greatest differences as to what is equality in the distribution of the produce of labour; some thinking that all should receive alike; others that the neediest should receive most; others that the distribution should be according to labour or services.
To get a clue to the common idea running through all these meanings, the author refers to the etymology of the word, which, in most languages, points to something ordained by law. Even although there be many things considered just, that we do not usually enforce by law, yet in these cases it would give us pleasure if law could be brought to bear upon offenders. When we think a person bound in justice to do a thing, we should like to see him punished for not doing it; we lament the obstacles that may be in the way, and strive to make amends by a strong expression of our own opinion. The idea of legal constraint is thus the generating idea of justice throughout all its transformations.
The real turning point between morality and simple expediency is contained in the penal sanction. Duty is what we may exact of a person; there may be reasons why we do not exact it, but the person himself would not be entitled to complain if we did so. Expediency, on the other hand, points to things that we may wish people to do, may praise them for doing, and despise them for not doing, while we do not consider it proper to bring in the aid of punishment.
There enters farther into the idea of Justice what has been expressed by the ill-chosen phrase, 'perfect obligation,' meaning that the duty involves a moral right on the part of some definite person, as in the case of a debt; an imperfect obligation is exemplified by charity, which gives no legal claim to any one recipient. Every such right is a case of Justice, and not of Beneficence.
The Idea of Justice is thus shown to be grounded in Law; and the next question is, does the strong feeling or sentiment of Justice grow out of considerations of utility? Mr. Mill conceives that though the notion of expediency or utility does not give birth to the sentiment, it gives birth to what is moral in it.
The two essentials of justice are (1) the desire to punish some one, and (2) the notion or belief that harm has been done to some definite individual or individuals. Now, it appears to the author that the desire to punish is a spontaneous outgrowth of two sentiments, both natural, and, it may be, instinctive; the impulse of self-defence, and the feeling of sympathy. We naturally resent, repel, and retaliate, any harm done to ourselves and to any one that engages our sympathies. There is nothing moral in mere resentment; the moral part is the subordination of it to our social regards. We are moral beings, in proportion as we restrain our private resentment whenever it conflicts with the interests of society. All moralists agree with Kant in saying that no act is right that could not be adopted as a law by all rational beings (that is, consistently with the well-being of society).
There is in Justice a rule of conduct, and a right on the part of some one, which right ought to be enforced by society. If it is asked why society ought to enforce the right, there is no answer but the general utility. If that expression seem feeble and inadequate to account for the energy of retaliation inspired by injustice, the author asks us to advert to the extraordinarily important and impressive kind of utility that is concerned. The interest involved is security, to every one's feelings the most vital of all interests. All other earthly benefits needed by one person are not needed by another; and many of them can, if necessary, be cheerfully foregone, or replaced by something else; but security no human being can possibly do without; on it we depend for all our immunity from evil, and for the whole value of all and every good, beyond the passing moment. Now, this most indispensable of all necessaries, after physical nutriment, cannot be had unless the machinery for providing it is kept unintermittedly in active play. Our notion, therefore, of the claim we have on our fellow-creatures to join in making safe for us the very groundwork of our existence, gathers feelings around it so much more intense than those concerned in any of the more common cases of utility, that the difference in degree (as is often the case in psychology) becomes a real difference in kind. The claim assumes that character of absoluteness, that apparent infinity, and incommensurability with all other considerations, which constitute the distinction between the feeling of right and wrong, and that of ordinary expediency and inexpediency.
Having presented his own analysis of the sentiment of Justice, the author proceeds to examine the intuitive theory. The charge is constantly brought against Utility, that it is an uncertain standard, differently interpreted by each person. The only safety, it is pretended, is found in the immutable, ineffaceable, and unmistakeable dictates of Justice, carrying their evidence in themselves, and independent of the fluctuations of opinions. But so far is this from being the fact, that there is as much difference of opinion, and as much discussion, about what is just, as about what is useful to society.
To take a few instances. On the question of Punishment, some hold it unjust to punish any one by way of example, or for any end but the good of the sufferer. Others maintain that the good of the society is the only admissible end of punishment. Robert Owen affirms that punishment altogether is unjust, and that we should deal with crime only through education. Now, without an appeal to expediency, it is impossible to arbitrate among these conflicting views; each one has a maxim of justice on its side. Then as to the apportioning of punishments to offences. The rule that recommends itself to the primitive sentiment of justice is an eye for an eye, a tooth for a tooth; a rule formally abandoned in European countries, although not without its hold upon the popular mind. With many, the test of justice, in penal infliction, is that it should be proportioned to the offence; while others maintain that it is just to inflict only such an amount of punishment as will deter from the commission of the offence.
Besides the differences of opinion already alluded to, as to the payment of labour, how many, and irreconcileable, are the standards of justice appealed to on the matter of taxation? One opinion is, that taxes should be in proportion to pecuniary means; others think the wealthy should pay a higher proportion. In point of natural justice, a case might be made out for disregarding means, and taking the same sum from each, as the privileges are equally bestowed: yet from feelings of humanity and social expediency no one advocates that view. So that there is no mode of extricating the question but the utilitarian.