Does Michael Huemer's program of "moral intuitionism" succeed in establishing a structural connection between moral intuition and God, or does intuitionism work within a naturalistic framework as well?

This question lies at the heart of the contemporary philosophical tension between moral intuitionism and the metaphysical foundations of ethics. Michael Huemer, in "Ethical Intuitionism" (2005) and "The Problem of Political Authority" (2013), developed the strongest contemporary defense of moral intuitionism. The question is: does his program entail — or even favor — the existence of God? Or can a naturalist adopt intuitionism without theistic metaphysical consequences?

Inadequate Responses to Avoid

From some defenders of theism:

"Moral intuitionism logically entails the existence of God." An inaccurate claim. Huemer himself does not claim this and explicitly states that intuitionism is compatible with multiple metaphysical positions. Direct logical entailment is not found in the academic texts.

"Moral intuition can only be explained by God." Excessive simplification. Even theistic philosophers like Robert Adams and Richard Swinburne acknowledge that theistic explanation is not the only logically available one, but rather the best explanatory inference (inference to the best explanation). The distinction is important.

"Huemer implicitly supports the moral argument for God." A misreading. Huemer is careful to avoid conflating intuitionism as an epistemological theory (how we know morality) with metaphysical foundations (what is the nature of morality). His epistemological position does not commit him to a specific metaphysical stance.

From some naturalists:

"Intuitionism is merely biological evolution." Insufficient reduction. Huemer responds that this confuses the origin of belief (genesis) with its justification. Even if our intuitions arose evolutionarily, this does not negate their truth or objectivity.

"Intuitions are subjective and unreliable." Huemer distinguishes between initial credence and personal preferences. Basic moral intuitions (such as "torture for pleasure is wrong") are characterized by a high degree of cross-cultural agreement, suggesting their objectivity.

"Intuitionism collapses in cases of moral disagreement." Huemer's response: disagreement exists in all epistemic domains, including science and mathematics. The existence of disagreement does not negate the possibility of objective knowledge.

Why These Responses Are Inadequate

They fail to grasp the complex nature of the relationship between moral intuitionism and metaphysical commitments. The discussion requires precise distinction between epistemological, metaphysical, and explanatory levels.

Structure of Huemer's Moral Intuitionism Program

The Epistemological Component: Moral intuitions provide prima facie justification for moral beliefs. When it seems to us that P is morally correct, we have reason to believe P, unless there is strong counterevidence. This is the principle of "Phenomenal Conservatism."

The Objectivity Component: Moral facts are objective and irreducible. "Murder for pleasure is wrong" is not merely an expression of feelings or social agreement, but an objective fact independent of our opinions.

The Methodological Component: We do not need a comprehensive metaphysical theory before accepting moral knowledge. Just as we accept sensory perception before solving the problem of the external world, we accept moral intuition before solving its metaphysical basis.

The Metaphysical Challenge: Where Do These Moral Facts Come From?

Here the real question emerges. Huemer defends moral objectivity without committing to a specific metaphysical foundation. But this leaves an open question: if moral facts are objective and irreducible, what is their metaphysical nature?

Available Options:

Moral Platonism: Moral facts exist in an independent abstract realm, like mathematical facts in Plato's theory. This is compatible with Huemer's program, but it raises the problem of epistemic access: how do our material minds connect with an abstract realm?

Strong Moral Naturalism: An attempt to reduce moral facts to natural facts (such as happiness or evolution). Huemer explicitly rejects this with G.E. Moore's "open question" argument: for any natural property N, the question "Is N really good?" remains open.

Non-reductive Naturalism: Accepting moral facts as emergent properties on nature but irreducible to it. This position (David Enoch, Russ Shafer-Landau) attempts to combine objectivity with naturalism.

Moral Theism: Moral facts are grounded in God's nature, will, or mind. This solves the epistemic access problem (God created our minds to perceive the right) and the obligation problem (morality has authority because it comes from the highest source of authority).

The Argument from Best Explanation

Robert Adams in "Finite and Infinite Goods" (1999) and Richard Swinburne in "The Coherence of Theism" (2016) develop an argument that theism provides the best explanation for successful moral intuitionism.

Strengths of the Theistic Explanation:

It explains why we have reliable epistemic access to moral facts: God designed our minds to perceive good and evil.

It explains the binding character of morality: not merely descriptive facts, but commands from absolute authority.

It explains moral convergence across cultures: shared natural disposition (fiṭra) implanted by the Creator.

It solves the problem of "cosmic coincidence": it is not a coincidence that our intuitions match objective moral facts.

The Contemporary Naturalist Response

David Enoch in "Taking Morality Seriously" (2011) and Russ Shafer-Landau in "Moral Realism: A Defence" (2003) defend the possibility of moral intuitionism within a naturalistic framework:

The Argument from Necessity: Moral facts are necessary like mathematical facts. They do not need "explanation" because they cannot be other than what they are.

The Argument from Simplicity: Adding God to explain morality unnecessarily complicates ontology. Moral facts can be accepted as brute facts.

The Argument from Independence: Linking morality to God threatens its independence. Is the good good because God commands it, or does God command it because it is good? (The Euthyphro dilemma).

Critical Assessment of Both Positions

Weaknesses of the Naturalist Position:

The problem of epistemic coincidence (Evolutionary Debunking): If our intuitions evolved for survival reasons rather than truth, why should we trust them in deep moral matters?

The problem of obligation: Even if objective moral facts exist, why should I care about them? Naturalism lacks a source of moral authority.

The problem of explanation: Accepting moral facts as brute facts seems arbitrary. Why does this particular universe contain these particular moral facts?

Weaknesses of the Theistic Position:

The Modified Euthyphro Dilemma: Even saying that morality "expresses God's nature" does not definitively solve the problem. Is God's nature good by necessity or by choice?

Moral diversity: If morality is divinely implanted, why is there deep moral disagreement even among believers?

Epistemic independence: Many atheists have strong moral intuitions. Does this mean they are connecting with God without knowing it?

The Most Precise Position

Huemer's moral intuitionism program does not logically entail theism, but it creates "explanatory pressure" that makes theism an attractive option. The discussion is not about logical entailment, but about the best available explanation.

From the Perspective of Rational Preponderance (rajḥān ʿaqlī)

Successful moral intuitionism adds to the cumulative evidence for God's existence, without being conclusive proof. The most probable position:

─ Moral intuitionism is epistemologically correct: we have genuine access to moral facts through intuition.
─ This poses a real explanatory challenge to naturalism.
─ Theism provides a more complete and coherent explanation, but without completely excluding alternatives.

Where We Stand in This Discussion Today

The debate over the relationship between moral intuitionism and metaphysical foundations has seen notable developments in the period 2020-2026. Most prominent is the deepening of the "evolutionary debunking" problem developed by Justin Clarke-Dones in "Morality and Mathematics" (2020), where he argued that moral realism and mathematical realism stand or fall together against debunking arguments — this complicates the naturalist position that accepts mathematics while rejecting moral metaphysics. In contrast, Erik Wielenberg continued his defense of godless moral realism in "A Divine Foundation for Morality?" and "Godless Morality," considering moral facts as necessary and not requiring external grounding. From the theistic side, Mark Linville and David Baggett developed cumulative arguments linking successful moral intuitionism with theistic explanation within broader frameworks including fine-tuning and consciousness. Huemer himself maintained his metaphysical neutrality, emphasizing that intuitionism is an epistemological, not metaphysical, theory.

The current philosophical position: moral intuitionism is widely accepted as an epistemological theory, but the gap between moral knowledge and its metaphysical foundation remains open. The explanatory pressure generated by successful intuitionism is real, and theism provides a coherent answer, but it is not the only academically available one. Resolution does not come from this argument alone, but from the accumulation of evidence — and this is precisely what the method of rational preponderance (rajḥān ʿaqlī) requires.