Mind–body dualism
Views that mind and body are distinct and separable.
Mind–body dualism is a set of views in the philosophy of mind holding that mental phenomena are non-physical, or that the mind and body are distinct and separable. It encompasses positions on the relationship between mind and matter, and between subject and object, and is contrasted with physicalism and enactivism in the mind–body problem. The concept has ancient roots in the works of Plato and Aristotle, who both posited multiple souls, and was later formalized by René Descartes, who identified the mind with consciousness and distinguished it from the physical brain.
- field
- Philosophy of mind
- known_for
- Distinction between mind and body as separate substances or properties
- key_proponents
- Plato, Aristotle, René Descartes, Richard Swinburne, William Hasker, J. P. Moreland, E. J. Lowe, Charles Taliaferro, Seyyed Jaaber Mousavirad, John Foster
- contrasted_with
- Physicalism, enactivism, monism, materialism
Lore & Background
Aristotle shared Plato's view of multiple souls and elaborated a hierarchical arrangement: a nutritive soul for growth and metabolism (shared by plants, animals, humans), a perceptive soul for pain, pleasure, and desire (shared by animals and humans), and a rational faculty unique to humans. For Aristotle, the first two souls perish with the organism, but an immortal intellective part remains. Plato believed the soul was not dependent on the body and held to metempsychosis, the migration of the soul to a new body. This view has been considered a form of reductionism by some philosophers. René Descartes is closely associated with dualism, holding that the mind is a nonphysical, non-spatial substance. He identified the mind with consciousness and self-awareness, distinguishing it from the physical brain as the seat of intelligence, and was the first documented Western philosopher to formulate the mind–body problem in its modern form. Substance dualism has many contemporary advocates, including Richard Swinburne, William Hasker, J. P. Moreland, E. J. Lowe, Charles Taliaferro, Seyyed Jaaber Mousavirad, and John Foster. Dualism is contrasted with various kinds of monism. Substance dualism is contrasted with all forms of materialism, while property dualism may be considered a form of non-reductive physicalism. Types of ontological dualism include substance dualism (mind and matter as distinct foundations), property dualism (distinction in properties of mind and matter), and predicate dualism (irreducibility of mental predicates to physical predicates).
Reader's Guide
Mind–body dualism has been a central framework in the philosophy of mind, shaping debates about consciousness, personal identity, and the relationship between mental and physical phenomena. Its historical importance is underscored by Descartes's formulation, which gave rise to the famous mind–body problem. The Copernican Revolution and 17th-century scientific discoveries reinforced the belief that the scientific method was the unique way of knowledge, and mind–body dualism remained the biomedical paradigm for three centuries. Substance dualism, particularly Cartesian dualism, argues that mental and physical substances are distinct and can causally affect each other (interactionism). It is compatible with theologies claiming immortal souls exist independently of the physical world. Emergent dualism, defended by William Hasker and Dean Zimmerman, holds that mental substances emerge when physical systems like the brain reach sufficient complexity, and is consistent with neuroscientific discoveries showing the dependence of mind on brain. Thomistic dualism, derived from Thomas Aquinas, denies that body and soul are different substances; instead, a person is composed of one substance (the soul), with the body as an ensouled physical structure. This view is distinguished from Cartesian dualism and has been defended by J. P. Moreland and Scott B. Rae. Property dualism asserts that mental properties emerge when matter is organized appropriately, and is a sub-branch of emergent materialism. Non-reductive physicalism, a form of property dualism, holds that all mental states are causally reducible to physical states, as argued in Donald Davidson's anomalous monism.
Did You Know?
- Aristotle believed the first two souls (nutritive and perceptive) perish when the organism dies, but an immortal intellective part remains.
- Plato believed in metempsychosis, the migration of the soul to a new physical body.
- René Descartes was the first documented Western philosopher to formulate the mind–body problem in its modern form.
- Thomistic dualism holds that a person is composed of only one substance (the soul), with the body as an ensouled physical structure.
Frequently Asked Questions
Who is Mind–body dualism?
Mind–body dualism is not a single figure but a family of philosophical positions asserting that mental phenomena are non-physical or that mind and body are fundamentally distinct and separable. It stretches back to Plato and Aristotle, who posited multiple souls, and reached its most famous modern form when René Descartes identified the mind with consciousness and set it apart from the physical brain.
What are Mind–body dualism's core claims and role?
At its heart, dualism holds that the mind and the body are either separate substances or distinct properties that cannot be reduced to one another. It occupies the philosophy of mind by addressing the relationship between mental and physical reality, as well as between subject and object.
Who are the key proponents defending Mind–body dualism?
Beyond Descartes, modern defenders include Richard Swinburne, William Hasker, J. P. Moreland, E. J. Lowe, Charles Taliaferro, John Foster, and Seyyed Jaaber Mousavirad. These thinkers continue to argue that conscious experience cannot be fully accounted for by purely physical explanations.
How does Mind–body dualism contrast with its main rivals?
Dualism is directly opposed by physicalism, materialism, and monism, all of which maintain that everything mental is ultimately physical or reducible to the physical. Enactivism offers yet another alternative by treating mind as an emergent process of embodied interaction rather than a separate substance.
Why is Mind–body dualism important to philosophy?
It frames one of the oldest and most persistent puzzles in the discipline: how, or whether, conscious experience relates to the physical brain. The debate shapes discussions across metaphysics, ethics, theology, and the philosophy of science, making it a cornerstone of the mind–body problem.
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