Moral realism

Moral realism (also ethical realism) is the position that ethical sentences express propositions that refer to objective features of the world (that is, features independent of subjective opinion), some of which may be true to the extent that they report those features accurately. This makes moral realism a non-nihilist form of ethical cognitivism (which accepts that ethical sentences express propositions and can therefore be true or false) with an ontological orientation, standing in opposition to all forms of moral anti-realism^[1] and moral skepticism, including ethical subjectivism (which denies that moral propositions refer to objective facts), error theory (which denies that any moral propositions are true), and non-cognitivism (which denies that moral sentences express propositions at all). Moral realism's two main subdivisions are ethical naturalism and ethical non-naturalism.^[2]

For the book by Russ Shafer-Landau, see Moral Realism: A Defence.

Most philosophers claim that moral realism dates at least to Plato as a philosophical doctrine^[3] and that it is a fully defensible form of moral doctrine.^[4] A 2009 survey involving 3,226 respondents^[5] found that 56% of philosophers accept or lean toward moral realism (28%: anti-realism; 16%: other).^[6] A 2020 study found that 62.1% accept or lean toward realism.^[7] Some notable examples of robust moral realists include David Brink,^[8] John McDowell, Peter Railton,^[9] Geoffrey Sayre-McCord,^[10] Michael Smith, Terence Cuneo,^[11] Russ Shafer-Landau,^[12] G. E. Moore,^[13] John Finnis, Richard Boyd, Nicholas Sturgeon,^[14] Thomas Nagel, Derek Parfit, and Peter Singer. Norman Geras has argued that Karl Marx was a moral realist.^[15] Moral realism's various philosophical and practical applications have been studied.^[16]

The semantic thesis: The primary semantic role of moral predicates (such as "right" and "wrong") is to refer to moral properties (such as rightness and wrongness), so that moral statements (such as "honesty is good" and "slavery is unjust") purport to represent moral facts, and express propositions that are true or false (or approximately true, largely false, and so on).

The alethic thesis: Some moral propositions are in fact true.

The metaphysical thesis: Moral propositions are true when actions and other objects of moral assessment have the relevant moral properties (so that the relevant moral facts obtain), where these facts and properties are robust: their metaphysical status, whatever it is, is not relevantly different from that of (certain types of) ordinary non-moral facts and properties.

A delineation of moral realism into a minimal form, a moderate form, and a robust form has been put forward in the literature.^[14]

The robust model of moral realism commits moral realists to three theses:^[17]

The minimal model leaves off the metaphysical thesis, treating it as matter of contention among moral realists (as opposed to between moral realists and moral anti-realists). This dispute is not insignificant, as acceptance or rejection of the metaphysical thesis is taken by those employing the robust model as the key difference between moral realism and moral anti-realism. Indeed, the question of how to classify certain logically possible (if eccentric) views—such as the rejection of the semantic and alethic theses in conjunction with the acceptance of the metaphysical thesis—turns on which model we accept.^[18] Someone employing the robust model might call such a view "realist non-cognitivism," while someone employing the minimal model might simply place such a view alongside other, more traditional, forms of non-cognitivism.

The robust model and the minimal model also disagree over how to classify moral subjectivism (roughly, the view that moral facts are not mind-independent in the relevant sense, but that moral statements may still be true).^[19] The historical association of subjectivism with moral anti-realism in large part explains why the robust model of moral realism has been dominant—even if only implicitly—both in the traditional and contemporary philosophical literature on metaethics.^[18]

In the minimal sense of realism, R. M. Hare could be considered a realist in his later works, as he is committed to the objectivity of value judgments, even though he denies that moral statements express propositions with truth-values per se. Moral constructivists like John Rawls and Christine Korsgaard^[20] may also be realists in this minimalist sense; the latter describes her own position as procedural realism. Some readings of evolutionary science such as those of Charles Darwin and James Mark Baldwin have suggested that in so far as an ethics may be associated with survival strategies and natural selection then such behavior may be associated with a moderate position of moral realism equivalent to an ethics of survival.

Advantages[edit]

Moral realism allows the ordinary rules of logic (modus ponens, etc.) to be applied straightforwardly to moral statements. We can say that a moral belief is false or unjustified or contradictory in the same way we would about a factual belief. This is a problem for expressivism, as shown by the Frege–Geach problem.

Another advantage of moral realism is its capacity to resolve moral disagreements: if two moral beliefs contradict one another, realism says that they cannot both be right, and therefore everyone involved ought to be seeking out the right answer to resolve the disagreement. Contrary theories of meta-ethics have trouble even formulating the statement "this moral belief is wrong," and so they cannot resolve disagreements in this way.

Criticisms[edit]

Several criticisms have been raised against moral realism. A prominent criticism, articulated by J.L. Mackie, is that moral realism postulates the existence of "entities or qualities or relations of a very strange sort, utterly different from anything else in the universe. Correspondingly, if we were aware of them it would have to be by some faculty of moral perception or intuition, utterly different from our ordinary ways of knowing everything else."^[24]^[25] A number of theories have been developed for how we access objective moral truths, including ethical intuitionism and moral sense theory.^[26]

Another criticism of moral realism put forth by Mackie is that it can offer no plausible explanation for cross-cultural moral differences— ethical relativism. "The actual variations in the moral codes are more readily explained by the hypothesis that they reflect ways of life than by the hypothesis that they express perceptions, most of them seriously inadequate and badly distorted, of objective values".^[27]

The evolutionary debunking argument suggests that because human psychology is primarily produced by evolutionary processes which do not seem to have a reason to be sensitive to moral facts, taking a moral realist stance can only lead to moral skepticism. The aim of the argument is to undercut the motivations for taking a moral realist stance, namely to be able to assert there are reliable moral standards.^[28]