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Bentley Hart’s Monism vs Descartes’s Substance Dualism

Bentley Hart’s Monism: Consciousness, Being, God and Descartes’s Substance Dualism, compared field by field from their entries in the Atlas.

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Idealism Bentley Hart’s Monism: Consciousness, Being, God David Bentley Hart
Dualism Descartes’s Substance Dualism René Descartes

The claim

In brief
Bentley Hart’s MonismThis is a metaphysical theory that constructs an ultimate unified monism by asserting the profound inseparability of consciousness (mind) and being (existence) itself. It posits that ultimate reality is God, who is the absolute unity of consciousness and being, fundamentally rejecting reductive physicalist explanations.
Descartes’s Substance DualismRené Descartes holds that consciousness, which he calls thought (cogitatio), is the essence of an immaterial thinking substance (res cogitans) wholly distinct from extended, mechanical body (res extensa). Every conscious state, from reasoning and willing to pain, color, and emotion, is a mode of the thinking thing and is immediately present to it. Sensations and passions, though, arise only in the union of mind and body, where brain processes stand in regular relations to experiences they do not resemble.
What consciousness is
Bentley Hart’s MonismConsciousness and being (existence) are two inseparable aspects of a single, ultimate ontological reality.
Descartes’s Substance DualismConsciousness is thought, defined as everything that happens within us insofar as we are immediately conscious of it, and it is the principal attribute of the mind.

Big questions

Can AI be conscious?Both agree
Bentley Hart’s MonismNoConsciousness is a restricted instance of infinite mind (God) and is not reducible to computation or physical processing. Therefore, artificial systems based purely on physical mechanisms cannot instantiate true consciousness.
Descartes’s Substance DualismNoSince thought belongs only to immaterial substance and matter is pure extension, a machine, however complex, would be mechanism without a mind.
Does consciousness survive death?Both agree
Bentley Hart’s MonismYesConsciousness is identified with ultimate being and God, meaning it is fundamental and cannot be destroyed. Hart’s theology suggests individuals are destined for union with God, becoming 'uncreated'.
Descartes’s Substance DualismYesDescartes presented the real distinction of soul and body as what makes the soul’s survival intelligible, and the Meditations announce that aim in their subtitle.
Could a mind be uploaded?Both agree
Bentley Hart’s MonismNoConsciousness is metaphysically unified, physically infrangible mental agency , making it impossible to capture, duplicate, or upload via computational means, which would only replicate 'third-person' processes.
Descartes’s Substance DualismNoCopying the body’s mechanism would not copy the immaterial thinking substance.
Does it give life meaning?Both agree
Bentley Hart’s MonismCosmic/UltimateThe entire reality is rationally coherent and grounded in God, the ultimate reason and consciousness, inherently supplying ultimate meaning, purpose, and value.
Descartes’s Substance DualismCosmic/UltimateDescartes’s system rests on a non-deceiving God who guarantees knowledge and created even the eternal truths.

Nature of mind

Ontology
Bentley Hart’s MonismIdealist Monism/Theistic Monism
Descartes’s Substance DualismSubstance dualism (Cartesian)
Mind and body
Bentley Hart’s MonismNon-reductive correlation/Theistic interaction (Justification: Hart argues the causal descriptions of material and mental spheres are radically disparate and incommensurable, making reductionism incoherent. Interaction, while problematic for materialists, is possible, perhaps through the power of God).
Descartes’s Substance DualismMind and body are really distinct finite substances with exclusive essences, thought and extension, and could by divine power exist apart. They are joined in the human being, where bodily motions give rise to sensations and the mind moves the body, though Descartes never explained that interaction satisfactorily.
Fundamental or emergent
Bentley Hart’s MonismPrimitive
Descartes’s Substance DualismPrimitive
Qualia
Bentley Hart’s MonismQualitative aspects of experience (mental reality) are irreducible. The irreducibility of mind is the same as the irreducibility of being, suggesting qualia are grounded in ultimate intelligibility.
Descartes’s Substance DualismSensory qualities are not properties of matter, which has only size, shape, motion, and arrangement. Experienced redness or pain is a mental mode arising in the embodied union and cannot be captured by extension.

How it works

Mechanism
Bentley Hart’s MonismThe unification of the conditions for knowledge (mind) and the conditions for existence (being) into a single, simple, ultimate act or reality (God).
Descartes’s Substance DualismMechanism on the bodily side and non-reduction on the mental side. Light mechanically affects eyes, nerves, and brain, and the mind then experiences color, distance, and shape in regular correspondence with those motions.
Where it is
Bentley Hart’s MonismUbiquitous/Cosmic (Justification: Consciousness, being unified with ultimate Being/God, is the ground of all reality, aligning with Idealist metaphysics).
Descartes’s Substance DualismThe mind is unextended. Sensations and passions are felt as belonging to one’s own body, and Descartes located mind-brain communication in the pineal gland.
What it does
Bentley Hart’s MonismMind holds causal priority over matter. Conscious, unified mental acts depend upon the infinite mind (God). The theory rejects the causal closure of the physical.
Descartes’s Substance DualismPassions are caused and strengthened by movements of the animal spirits and dispose the soul toward volition and action. The will can in turn move the body.

Evidence and criticism

Testability
Bentley Hart’s MonismSpeculative/Conceptually Testable (Justification: The theory is a high-level metaphysical framework founded on philosophical critiques; Hart questions the possibility of a science of mental reality under physicalist assumptions).
Descartes’s Substance DualismConceptually testable
Tests so far
Bentley Hart’s MonismNot stated
Descartes’s Substance DualismNot stated
Criticisms
Bentley Hart’s MonismCritics find the conclusion to unify consciousness, being, and God 'strange'. The theory faces the standard challenge of articulating the continuity or interaction between the disparate mental and material spheres without invoking rejected concepts like strong emergence.
Descartes’s Substance DualismPrincess Elisabeth of Bohemia asked how an immaterial soul could move a material body, and the interaction problem remains unresolved. Arnauld and later critics charged circularity, since the proofs of God that guarantee clear and distinct perception themselves rely on clear and distinct perception. The standard reading denies consciousness to animals, which most now find implausible.

Sources

Key sources
Bentley Hart’s Monism
  • Mind, Being, God - Spiritual Science and the Science of Mind, Part Four (2022)
  • Science, consciousness, information: spiritual science and the science of mind, Part One (2021)
  • Does consciousness defeat materialism (Part 2) (2019)
Descartes’s Substance Dualism
  • Meditations on First Philosophy, René Descartes (trans. J. Cottingham, R. Stoothoff, and D. Murdoch) (1984)
  • Principles of Philosophy, René Descartes (trans. J. Cottingham, R. Stoothoff, and D. Murdoch) (1985)
  • The Passions of the Soul, René Descartes (trans. J. Cottingham, R. Stoothoff, and D. Murdoch) (1985)

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