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18 theories

Panpsychism: theories of consciousness

Consciousness is a basic feature of the physical world. The fundamental particles and fields of physics have experiential, or proto-experiential, properties, and in brains these combine into the full awareness of a human or animal.

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Panpsychism puts some trace of mind wherever there is matter, and perhaps wherever there is spacetime. Its appeal comes from the hard problem. If no arrangement of wholly nonconscious parts seems able to produce experience, perhaps the parts were never wholly nonconscious. The idea is ancient, with roots in animist religion, Greek thought, Leibniz’s monads and Indian schools such as Vedānta, and it has gained ground among analytic philosophers in recent decades.

The usual argument goes back to Bertrand Russell. Physics describes what matter does, its structure and dispositions, and says nothing about what matter intrinsically is. Panpsychists propose that this inner nature is experiential. Consciousness then needs no special origin. It was present all along and becomes rich and unified in brains.

Versions differ over where the mind sits. Micropsychism gives experience to the smallest physical units. Panprotopsychism gives them only proto-experiential properties that are not yet conscious. Cosmopsychism starts from the universe as a single conscious whole. Galen Strawson, Philip Goff and David Chalmers are leading contemporary defenders, and Alfred North Whitehead’s process philosophy treats moments of experience as the basic events of nature.

The hardest question is the combination problem. Nobody has shown how countless tiny subjects add up to one unified human mind, and Yujin Nagasawa argues the step may be impossible to demonstrate even if panpsychism is true. John Searle objected that consciousness comes in discrete units and cannot be spread over the universe ‘like a thin veneer of jam’.

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