The mind-body dualism argument contends that consciousness possesses irreducible properties that cannot be explained by physical processes alone, thereby supporting theism by suggesting that mental phenomena require a non-physical source, traditionally identified with God or divine creation. The argument's inferential structure moves from phenomenological observations about consciousness—such as subjective experience, intentionality, and qualitative states—to the metaphysical conclusion that minds constitute a distinct ontological category from physical matter. This distinction is then leveraged to argue that naturalistic materialism fails to account for mental reality, while theism provides a coherent explanation through divine creation of souls or consciousness itself.
The argument's philosophical lineage extends from Plato's Phaedo (380 BCE) through Descartes' Meditations on First Philosophy (1641), where the cogito established the epistemic priority of mental existence. Contemporary defenders include Richard Swinburne in The Evolution of the Soul (1986), arguing that mental properties require divine explanation, and J.P. Moreland in The Recalcitrant Imago Dei (2009), defending substance dualism as evidence for theism. Alvin Plantinga's "Against Materialism" (2006) employs modal arguments to demonstrate the metaphysical distinctness of mental states. Within Islamic philosophy, Mullā Ṣadrā's al-Asfār al-Arbaʿa (1630s) developed a sophisticated dualism where the soul's immateriality points to divine origin, while Seyyed Hossein Nasr's Knowledge and the Sacred (1981) argues that consciousness reflects divine attributes.
Critics raise several objections: the interaction problem questions how immaterial minds causally influence physical bodies without violating conservation laws; neuroscientific evidence demonstrates systematic correlations between brain states and mental phenomena; and evolutionary biology explains consciousness as an emergent property of complex neural systems. Paul Churchland's Matter and Consciousness (1984) argues that dualism multiplies entities unnecessarily, while Daniel Dennett's Consciousness Explained (1991) attempts to dissolve rather than solve the hard problem. Defenders respond by arguing that correlation doesn't entail identity, that the interaction problem equally afflicts physicalist accounts of causation, and that evolutionary explanations address function but not phenomenology. Swinburne particularly emphasizes that theism provides the simplest explanation for psychophysical laws connecting mental and physical realms.
The mind-body dualism argument differs from sibling formulations by focusing on the ontological distinction between mental and physical substances rather than specific aspects of consciousness. Unlike the hard problem, which emphasizes the explanatory gap between physical processes and subjective experience, dualism makes the stronger claim of substance distinction. While the qualia argument focuses specifically on the irreducibility of phenomenal properties, and the intentionality argument on the aboutness of mental states, mind-body dualism encompasses both within a comprehensive metaphysical framework. The emergence problem questions whether consciousness can arise from non-conscious components, whereas dualism denies this possibility outright, asserting fundamental categorical difference.