Can the mind actually cause physical actions if the brain is a closed system?
In short: Jaegwon Kim spent his career challenging the idea that mental states like beliefs can cause physical actions. He argued that if every physical event has a sufficient physical cause, then mental states are either redundant or entirely impotent, forcing a difficult choice between reductionism and epiphenomenalism.
Jaegwon Kim, a prominent Korean-American philosopher who taught at institutions including Brown University and the University of Michigan, dedicated his life to the mind-body problem. Influenced by Carl Hempel and Roderick Chisholm, Kim sought to apply scientific rigor to metaphysics. His work centered on the tension between the physical world's causal closure and our intuitive sense that mental states drive our behavior.
The core of Kim's critique lies in the 'causal exclusion' problem. He argued that if a physical action has a complete physical cause, there is no room for a mental state to also cause that action without creating an impossible case of causal overdetermination. Because physical causes are sufficient, the mental state is excluded from contributing to the physical outcome. This leads to the uncomfortable conclusion that mental states might be epiphenomenal—mere byproducts of physical processes with no real causal power.
Kim proposed that to preserve mental causation, one must reject the idea that mental states are irreducible. He argued that mental properties must be functionally reducible to physical properties to have any causal efficacy. While he initially defended identity theory and later non-reductive physicalism, he eventually concluded that qualia—the subjective, qualitative aspects of experience—remain functionally irreducible. This forced him toward a form of property dualism, though he maintained that physicalism remained the most comprehensive worldview available.
Beyond the mind-body problem, Kim was a sharp critic of naturalized epistemology. In his 1988 essay, he argued that descriptive approaches, such as those popularized by W.V.O. Quine, fail to address the normative requirements of knowledge. For Kim, a true epistemology must explain justified belief, not just describe how beliefs are formed. His legacy remains a cornerstone for those navigating the boundaries between science and the philosophy of mind.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Jaegwon Kim
To cite this card, link to https://intellectplus.co.uk/app/ideas-jaegwon-kim.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Philosophers · More in Ideas & Philosophy · Latest · A–Z · All topics
