Death & What Follows

Substance Dualism and the Survival of the Soul

alternative Classical Ancient roots (Plato); classical formulation by René Descartes, 1641

Holds that a person consists of two distinct substances — a physical body and a non-physical mind or soul — and that because the soul is not made of matter, it is not necessarily destroyed when the body dies, leaving open the possibility of conscious survival.

Proponents

Plato, René Descartes

Evidence For

Grounded in the strong, widely shared first-person intuition that one's conscious experience feels categorically different from any physical process one can point to, and that 'I' seem to remain the same continuous subject despite the body's matter constantly being replaced.

Evidence Against

Faces the unresolved "interaction problem": if the soul is truly non-physical, it is unclear how it could causally interact with a physical brain and body at all — a difficulty philosophers have pressed against dualism since Descartes' own contemporaries raised it directly to him.

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