Ethics is generally looked upon as a "normative" science, the object of which is to find and formulate moral principles and rules possessing objective validity. The supposed objectivity of moral values, as understood in this treatise, implies that they have a real existence apart from any reference to a human mind, that what is said to be good or bad, right or wrong, cannot be reduced merely to what people think to be good or bad, right or wrong. It makes morality a matter of truth and falsity, and to say that a judgment is true obviously means something different from the statement that it is thought to be true. The objectivity of moral judgments does not presuppose the infallibility of the individual who pronounces such a judgment, nor even the accuracy of a general consensus of opinion; but if a certain course of conduct is objectively right, it must be thought to be right by all rational beings who judge truly of the matter and cannot, without error, be judged to be wrong.
In spite of the fervour with which the objectivity of moral judgments has been advocated by the exponents of normative ethics there is much diversity of opinion with regard to the principles underlying the various systems. This discord is as old as ethics itself. But while the evolution of other sciences has shown a tendency to increasing agreements on points of fundamental importance, the same can hardly be said to have been the case in the history of ethics, where the spirit of controversy has been much more conspicuous than the endeavour to add new truths to results already reached. Of course, if moral values are objective, only one of the conflicting theories can possibly be true. Each founder of a new theory hopes that it is he who has discovered the unique jewel of moral truth, and is naturally anxious to show that other theories are only false stones. But he must also by positive reasons make good his claim to the precious find.
These reasons are of great importance in a discussion of the question whether moral judgments really are objective or merely are supposed to be so; for if any one of the theories of normative ethics has been actually proved to be true, the objectivity of those judgments has eo ipso been established as an indisputable fact.
There are no doubt moral propositions which really are certain and self-evident, for the simple reason that they are tautological, that the predicate is but a repetition of the subject; and moral philosophy contains a great number of such tautologies, from the days of Plato and Aristotle to the present times. But apart from such cases, which of course tell us nothing, I am not aware of any moral principle that could be said to be truly self-evident. The presumed self-evidence is only a matter of opinion; and in some cases one might even be inclined to quote Mr. Bertrand Russellís statement that "if self-evidence is alleged as a ground of belief, that implies that doubt has crept in, and that our self-evident proposition has not wholly resisted the assaults of scepticism." None of the various theories of normative science can be said to have proved its case; none of them has proved that moral judgments possess objective validity, that there is anything good or bad, right or wrong, that moral principles express anything more than the opinions of those who believe in them.
But what, then, has made moralists believe that moral judgments possess an objective validity which none of them has been able to prove? What has allured them to invent a science the subject-matter of which - the objectively good or right - is not even known to exist? The answer is not difficult to find. It has often been remarked that there is much greater agreement among moralists on the question of moral practice than on the question of theory. When they are trying to define the ultimate end of right conduct or to find the essence of right and wrong, they give us the most contradictory definitions or explanations - as Leslie Stephen said, we find ourselves in a "region of perpetual antinomies, where controversy is everlasting, and opposite theories seem to be equally self-evident to different minds." But when they pass to a discussion of what is right and wrong in concrete cases, in the various circumstances of life, the disagreement is reduced to a surprising extent. They all tell us that we should be kind to our neighbour, that we should respect his life and property, that we should speak the truth, that we should live in monogamy and be faithful husbands or wives, that we should be sober and temperate, and so forth. This is what makes books on ethics, when they come to the particular rules of life, so exceedingly monotonous and dull; for even the most controversial and pugnacious theories becomes then quite tame and commonplace. And the reason for this is that all ethical theories are as a matter of fact based on the morality of common sense...So also normative ethics has adopted the common sense idea that there is something right and wrong independently of what is thought to be right or wrong. People are not willing to admit that their moral convictions are a mere matter of opinion, and took upon convictions differing from their own as errors. If asked why there is so much diversity of opinion on moral questions, and consequently so many errors, they would probably argue that there would be unanimity as regards the rightness or wrongness of a given course of conduct if everybody possessed a sufficient knowledge of the case and all the attendant circumstances and if, at the same time, everybody had a sufficiently developed moral consciousness - which practically would mean a moral consciousness as enlightened and developed as their own. This characteristic of the moral judgments of common sense is shared by the judgments of philosophers, and is at the bottom of their reasoned arguments in favour of the objectivity of moral values.
The common sense idea that moral judgments possess objective validity is itself regarded as a proof of their really possessing such validity. It is argued that the moral judgment "claims objectivity," that it asserts a value which is found in that on which it is pronounced. "This is the meaning of the judgment," says Professor Sorley. "It is not about a feeling or attitude of, or any relation to the subject who makes the judgment."... The whole argument is really reduced to the assumption that an idea - in this case the idea of the validity of moral judgments - which is generally held, or held by more or less advanced minds, must be true; people claim objective validity for the moral judgments, therefore it must possess such validity. The only thing that may be said in favour of such an argument is, that if the definition of a moral proposition implies the claim to objectivity, a judgment that does not express this quality cannot be a moral judgment; but this by no means proves that moral propositions so defined are true - the predicated objectivity may be a sheer illusion.
The authority assigned to conscience is really only an echo of the social or religious sanctions of conduct: it belongs to the "public" or the religious conscience, vox populi or vox dei. In theory it may be admitted that every man ought to act in accordance with his conscience. But this phrase is easily forgotten when, in any matter of importance, the individualís conscience comes into conflict with the common sense of his community; or doubt may be thrown upon the sincerity of his professed convictions, or he may be blamed for having such a conscience as he has. There are philosophers, like Hobbes and Hegel, who have denied the citizen the right of having a private conscience. The other external source from which authority has been instilled into the moral law is the alliance between morality and religion...It has been pointed out by Schopenhauer and others that Kantís categorical imperative, with its mysteriousness and awfulness, is really an echo of the old religious formula "Thou shalt," though it is heard, not as the command of an external legislator, but as a voice coming from within. Schiller wrote to Goethe, "There still remains something in Kant, as in Luther, that makes one think of a monk who has left his monastery, but been unable to efface all traces of it."
The theological argument in favour of the objective validity of moral judgments, which is based on belief in an all-good God who has revealed his will to mankind, contains, of course, an assumption that cannot be scientifically proved. But even if it could be proved, would that justify the conclusion drawn from it? Those who maintain that they in such a revelation possess an absolute moral standard and that, consequently, any mode of conduct which is in accordance with it must be objectively right, may be asked what they mean by an all-good God. If God were not supposed to be all-good, we might certainly be induced by prudence to obey his decrees, but they could not lay claim to moral validity; suppose the devil were to take over the government of the world, what influence would that have on the moral values - would it make the right wrong and the wrong right? It is only the all-goodness of God than can give his commandments absolute moral validity. But to say that something is good because it is in accordance with the will of an all-good God is to reason in a circle; if goodness means anything, it must have a meaning which is independent of his will. God is called good or righteous because he is supposed to possess certain qualities that we are used to call so: he is benevolent, he rewards virtue and punishes vice, and so forth. For such reasons we add the attributes goodness and righteousness to his other attributes, which express qualities of an objective character, and by calling him all-good we attribute to him perfect goodness. As a matter of fact, there are also may theologians who consider moral distinctions to be antecedent to the divine commands. Thomas Aquinas and his school maintain that the right is not right because God wills it, but that God wills it because it is right.
...Another question is whether the ethical subjectivism I am here advocating really is a danger to morality. It cannot be depreciated by the same inference as was drawn from the teaching of the ancient Sophists, namely, that if that which appears to each man as right or good stands for that which is right or good, then everybody has the natural right to follow his caprice and inclinations and to hinder him doing so is an infringement on his rights. My moral judgments spring from my own moral consciousness; they judge of the conduct of other men not from their point of view but from mine, not in accordance with their feelings and opinions about right and wrong but according to my own. And these are not arbitrary. We approve and disapprove because we cannot do otherwise; our moral consciousness belongs to our mental constitution, which we cannot change as we please. Can we help feeling pain when the fire burns us? Can we help sympathizing with our friends? Are these facts less necessary or less powerful in their consequences, because they fall within the subjective sphere of our experience? So also, why should the moral law command less obedience because it forms a part of ourselves?
I think that ethical writers are often inclined to overrate the influence or moral theory upon moral practice, but if there is any such influence at all, it seems to me that ethical subjectivism, instead of being a danger, is more likely to be an advantage to morality. Could it be brought home to people that there is no absolute standard in morality, they would perhaps be on the one hand more tolerant and on the other hand more critical in their judgments. Emotions depend on cognitions and are apt to vary according as the cognitions vary; hence a theory which leads to an examination of the psychological and historical origin of peopleís moral opinions should be more useful than a theory which postulates moral truths enunciated by self-evident intuitions that are unchangeable. In every society the traditional notions as to what is good or bad, obligatory or indifferent, are commonly accepted by the majority of people without further reflection. By tracing them to their source it will be found that not a few of these notions have their origin in ignorance and superstition or in sentimental likes or dislikes, to which a scrutinizing judge can attach little importance; and, on the other hand, he must condemn many an act or omission which public opinion, out of thoughtlessness, treats with indifference. It will, moreover, appear that moral estimates often survive the causes from which they sprang. And what unprejudiced person can help changing his views if he be persuaded that they have no foundation in existing facts?
I have thus arrived at the conclusion that neither the attempts of moral philosophers or theologians to prove the objective validity of moral judgments, nor the common sense assumption to the same effect, give us any right at all to accept such a validity as a fact. So far, however, I have only tried to show that it has not been proved; now I am prepared to take a step further and assert that it cannot exist. The reason for this is that in my opinion the predicates of all moral judgments, all moral concepts, are ultimately based on emotions, and that, as is very commonly admitted, no objectivity can come from an emotion. It is of course true or not that we in a given moment have a certain emotion; but in no other sense can the antithesis of true and false be applied to it. The belief that gives rise to an emotion, the cognitive basis of it, is either true or false; in the latter case the emotion may be said to be felt "by mistake" - as when a person is frightened by some object in the dark which he takes for a ghost, or is indignant with a person to whom he imputes a wrong that has been committed by somebody else; but this does not alter the nature of the emotion itself. We may call the emotion of another individual "unjustified," if we feel that we ourselves should not have experienced the same emotion had we been in his place, or, as in the case of moral approval or disapproval, if we cannot share his emotion. But to speak, as Brentano does, of "right" and "wrong" emotions, springing from self-evident intuitions and having the same validity as truth and error, is only another futile attempt to objectivize our moral judgments....
If there are no moral truths it cannot be the object of a science of ethics to lay down rules for human conduct, since the aim of all science is the discovery of some truth. Professor Höffdung argues that the subjectivity of our moral valuations does not prevent ethics from being a science any more than the subjectivity of our sensations renders a science of physics impossible, because both are concerned with finding the external facts that correspond to the subjective processes. It may, of course, be a subject for scientific inquiry to investigate the means which are conducive to human happiness or welfare, and the results of such a study may also be usefully applied by moralists, but it forms no more a part of ethics than physics is a part of psychology. If the word "ethics" is to be used as the name for a science, the object of that science can only be to study the moral consciousness as a fact.