Sterling and the Contemporary Proponents — Argument Correspondence Map C3 — Moral Realism: Sterling and Shafer-Landau
Sterling and the Contemporary Proponents — Argument Correspondence Map
C3 — Moral Realism: Sterling and Shafer-Landau
Analysis: Dave Kelly, 2026. Theoretical framework: Grant C. Sterling. Prose rendering: Claude.
I. The Sterling Argument
The governing corpus passages are Stoicism, Moral Facts, and Ethical Intuitionism (Sterling, ISF February 24 and March 13, 2020), Stoicism, Moral Realism, and the Necessity of Objective Moral Facts (Sterling, ISF), Stoicism and Self-Interest: What Is Our Interest? (Sterling, August 2014), and the C3 analytical essay (Kelly, 2026 from Sterling’s theoretical foundations).
Sterling’s argument for moral realism has two distinct components: an argument from the internal requirements of Stoicism, and an argument from the elimination of alternatives.
The internal requirement argument:
Premise One: The Stoic project requires that impressions about value can be factually false — not merely unhelpful, not merely culturally contingent, but objectively false. Sterling states this in Nine Excerpts Section 6: “This belief is factually false. Note that this is not a psychological claim — it is a value claim.”
Premise Two: For an impression to be factually false about value, there must be mind-independent moral facts against which it fails to correspond. If moral claims express only preferences or social agreements, there is no basis for calling a value impression false rather than culturally contingent or personally unhelpful.
Premise Three: Stoicism is incoherent without moral facts. The claim that externals are neither good nor evil is a fact about the universe, independent of how we want things to be. If it is not a fact, it is merely a Stoic preference, and the entire project of examining and correcting value impressions collapses into preference management.
Conclusion A: Moral realism is a necessary condition of the Stoic project. If there are no objective moral facts, the Stoic project fails utterly.
The elimination of alternatives argument:
Premise One: Moral truths are necessary, not contingent. They have no source in the way empirical facts have sources, just as 2+2=4 has no source. They could not have been otherwise.
Premise Two: Moral terms cannot be heard, smelt, tasted, seen, or felt. They are not accessible through sensory experience. Any account that grounds moral knowledge in sensory experience therefore fails to account for how moral knowledge is possible at all.
Premise Three: The alternatives to moral realism are moral constructivism (moral facts are produced by rational procedure or social agreement) and moral nihilism (there are no moral facts). Constructivism fails because constructed values are dependent on the minds and procedures that generate them and therefore not genuinely mind-independent. Nihilism eliminates moral knowledge altogether.
Conclusion B: Intuitionism or nihilism — no third alternative. Moral realism, grounded in direct rational apprehension of necessary moral truths, is the only position that preserves moral knowledge without reducing it to preference or eliminating it.
The three test cases (Document 19 — Stoicism and Self-Interest): The Smith/Jones case, the Ring of Gyges, and the dying molester each eliminate one layer of the instrumental account of virtue’s goodness. When all layers are stripped, the only surviving position is that virtue is intrinsically good — good in itself, not good because of what it produces. Intrinsic goodness requires moral realism: if virtue is intrinsically good, its goodness is a real property, not a projection.
Sterling’s argument compressed:
- The Stoic project requires that value impressions can be factually false.
- Factual falsity requires mind-independent moral facts against which impressions fail to correspond.
- Moral truths are necessary, not contingent, and not accessible through sensory experience.
- Constructivism produces mind-dependent values; nihilism eliminates moral facts entirely.
- Intuitionism or nihilism — no third alternative survives.
- Therefore objective moral facts exist, virtue is intrinsically good, and moral realism is true.
II. The Shafer-Landau Argument
The governing text is Russ Shafer-Landau, Moral Realism: A Defence (Oxford University Press, 2003).
Shafer-Landau defends non-naturalist moral realism — the claim that there are objective moral truths not reducible to natural properties — through three interconnected arguments: an argument against reduction, an argument for mind-independence, and an argument for moral supervenience.
The argument against reduction:
Premise One: Moral properties are not identical to natural properties. For any natural property N proposed as the reduction of a moral property, it remains an open question whether N is genuinely good or genuinely right. This is Moore’s open question argument, which Shafer-Landau endorses as establishing the non-identity of moral and natural properties.
Premise Two: If moral properties are not identical to natural properties, they cannot be derived from natural properties by any logical or empirical inference. The is/ought gap is real.
Conclusion from reduction argument: Moral properties are sui generis — genuinely distinct from natural properties and not reducible to them.
The argument for mind-independence:
Premise One: Moral claims purport to be true or false independently of what anyone believes, prefers, or agrees to. This is what moral discourse is about: not what we happen to endorse, but what is genuinely right or wrong.
Premise Two: If moral claims are true or false independently of what anyone believes, then moral facts are mind-independent. They hold whether or not anyone recognizes them, affirms them, or cares about them.
Premise Three: Constructivist accounts make moral facts dependent on the procedures, agreements, or attitudes of rational agents. They therefore cannot account for the mind-independence that moral discourse presupposes.
Conclusion from mind-independence argument: Moral facts are mind-independent. Constructivism fails as an account of moral truth.
The argument from moral supervenience:
Premise One: Moral properties supervene on non-moral properties: no two situations can be identical in all non-moral respects while differing in moral properties. This supervenience is necessary, not contingent.
Premise Two: Necessary supervenience requires explanation. It cannot be a brute coincidence that moral properties co-vary necessarily with non-moral properties.
Premise Three: The best explanation of necessary moral supervenience is that moral properties are real features of the world that are fixed by non-moral features without being identical to them — which is precisely what non-naturalist moral realism claims.
Conclusion from supervenience argument: Non-naturalist moral realism provides the best explanation of necessary moral supervenience.
Shafer-Landau’s argument compressed:
- Moral properties are not identical to natural properties (open question argument).
- Moral claims purport to be true independently of what anyone believes or agrees to.
- Constructivism makes moral facts mind-dependent and cannot account for this independence.
- Moral properties necessarily supervene on non-moral properties without being reducible to them.
- Non-naturalist moral realism best explains this necessary supervenience.
- Therefore objective moral facts exist, are mind-independent, and are not reducible to natural properties.
III. Correspondence Finding
Point of structural identity — mind-independence as the decisive criterion: Both Sterling and Shafer-Landau identify the same criterion as what moral realism requires: moral facts must be mind-independent. Sterling states this as the condition for calling a value impression factually false rather than culturally contingent. Shafer-Landau states this as what moral discourse presupposes and what constructivism cannot deliver. The argumentative move is identical: moral claims are not about what anyone believes, prefers, or agrees to — they are about how things actually are in the evaluative domain.
Point of structural identity — the refutation of constructivism: Both Sterling and Shafer-Landau make the same objection to constructivism. Constructivism produces values that are dependent on the minds and procedures that generate them. Sterling’s objection: a constructed value is not a fact about the universe independent of how we want things to be. Shafer-Landau’s objection: constructivism makes moral facts mind-dependent and cannot account for the mind-independence moral discourse presupposes. The structure of the objection is the same: constructivism relocates moral facts from the world to the procedure, and in doing so loses what moral realism requires.
Point of structural identity — moral facts as necessary rather than contingent: Sterling holds that moral truths are necessary, not contingent — they have no source, just as 2+2=4 has no source, and could not have been otherwise. Shafer-Landau’s supervenience argument establishes the same modal status: necessary moral supervenience requires that moral properties are real features of the world fixed necessarily by non-moral features. Both are making the same claim about the modal status of moral facts: they are necessary truths, not contingent ones, and their necessity requires a realist rather than constructivist or nihilist account.
Point of divergence — the Stoic grounding: Sterling’s moral realism is specifically grounded in the requirements of the Stoic project: if there are no objective moral facts, the project of examining and correcting value impressions collapses. The moral facts Sterling cares about are specific: that virtue is the only genuine good, that vice is the only genuine evil, that externals are indifferent. Shafer-Landau defends moral realism in general — the claim that some moral facts are objective — without committing to any specific moral content. His defense is compatible with a wide range of moral positions. Sterling’s defense is inseparable from the specific Stoic value ontology. The correspondence is structural; the specific moral content is Sterling’s own.
Point of divergence — the three test cases: Sterling’s most distinctive argumentative contribution to C3 is the three test cases from Document 19 — Smith/Jones, Ring of Gyges, dying molester — which eliminate instrumental accounts of virtue’s goodness by stripping away each layer of instrumental benefit. This argument has no equivalent in Shafer-Landau. It is Sterling’s original contribution to the case for moral realism, developed within the specific context of Stoic self-interest theory. The correspondence map covers the structural overlap; this argument stands independently in the corpus as Sterling’s own.
Overall correspondence finding: The load-bearing argumentative moves are structurally equivalent. Both Sterling and Shafer-Landau establish mind-independence as the decisive criterion, make the same objection to constructivism, and hold that moral facts are necessary rather than contingent. Shafer-Landau’s comprehensive analytic defense provides independent philosophical corroboration for Sterling’s position argued from within the Stoic framework. The divergence in grounding — Stoic requirements versus general moral realism — is complementary: Shafer-Landau establishes that moral realism is defensible in the analytic mainstream; Sterling establishes the specific moral facts the Stoic framework requires. Sterling’s three test cases are a distinct and original contribution not present in Shafer-Landau and not carried over by the correspondence.
Sterling and the Contemporary Proponents — Argument Correspondence Map. C3: Moral Realism. Analysis: Dave Kelly, 2026. Theoretical framework: Grant C. Sterling. Prose rendering: Claude.
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