Dualismin

Dualism is the view that reality consists of two fundamentally different kinds of stuff or properties. In the philosophy of mind, it most often denotes that mental phenomena, such as thoughts, feelings, and consciousness, are non-physical and in some sense distinct from the physical body. Within dualism there are several strands, including substance dualism, property dualism, and dual-aspect theories. Substance dualism holds that mind and body are two separate substances, with the mind typically conceived as non-physical and the body as physical. Property dualism allows for mental properties to exist without committing to a separate mental substance, while dual-aspect theories propose that mind and matter are two interrelated aspects of the same underlying substance.

Substance dualism is most associated with René Descartes, who argued that the mind is a thinking, non-material substance (res cogitans) and that it interacts with the body, which is a physical substance (res extensa). The main philosophical challenge for dualism is the interaction problem: if mind and body are fundamentally different, how can they causally affect one another? Various responses have been offered, including occasionalism, parallelism, and emergentist or property-based explanations, but the problem remains central to many discussions of dualism.

Historically, dualist ideas appear in ancient and early modern thought and have been contrasted with monist positions such as materialism and idealism. In contemporary philosophy of mind, dualism is often discussed as a minority but influential position, alongside physicalist and functionalist theories. The debate continues to address issues of mental causation, the nature of consciousness, and how subjective experience fits into a scientific world. Related topics include the mind–body problem, Cartesian dualism, and various forms of non-physicalism.