Dilemma
Is the physical world fully real?
Realists, idealists, and relationalists divide on whether matter exists mind-independently, derivatively, or as a pattern of relations. The split runs deeper than any single scientific question.
Context
The realism-idealism dispute is one of the oldest in philosophy and has new analogues in contemporary debates about quantum measurement, the simulation hypothesis, and the ontology of computation. Some traditions take the physical world to be mind-independent and fully real. Others hold that it is real but sustained — by mind, by divine attention, by an underlying computational or informational layer. Still others read reality as a pattern of standing relations rather than as substance at all. And cyclical cosmologies relativise the question to the present cosmic round.
Why it matters
What kind of reality matter has shapes the metaphysics of science (does physics describe the world or our best model of it?), the theology of creation (is the world the bedrock of God's act or a sustained appearance?), the ethics of how we treat material things, and the seriousness we give to apparently mind-dependent or simulation-style framings.
The coordinates that split the schools
The stances
Yes — the physical world is fully real, mind-independent, persisting.
70 schoolsOn this view, the physical world exists as it is whether anyone observes it or not. Its reality is not derivative on mind, model, or relation; matter is itself the kind of thing that has standing. Whether grounded in a creator's act or in the brute structure of nature, matter is real, substantival, and conserved.
Where this stance leads ⓘ
- 1% Yes — matter was created and is conserved as a real substance. on Is the world created from nothing?
- 1% Matter is morally considerable insofar as it is created or conserved good. on Does matter have intrinsic moral standing?
- 1% Truth is mind-independent, universal, accessible in principle to all. on Is truth universal, tradition-bound, situated, or constructed?
- 1% Causation runs one way — the arrow of time is real and structural. on Could causation work backwards?
- 1% The asymmetry is real because time itself has a real direction. on Is the asymmetry between memory and anticipation a real feature of time, or just of us?
Real but sustained — not mind-independent in the strict realist sense.
36 schoolsOn this view, the physical world is real enough — it has its own laws, its own conservation principles, its own resistance to wish — but it is not the floor of being. It is sustained by something else: mind, divine attention, computational substrate, or the patterning of conditions. Strict mind-independence overstates what is the case; pure illusion understates it.
Where this stance leads ⓘ
- 1% Matter is real but emerges from something deeper — neither bedrock nor created-from-nothing. on Is the world created from nothing?
- 1% Matter is morally considerable derivatively — through what it sustains. on Does matter have intrinsic moral standing?
- 1% The future is open and you are a genuine origin of it. on Do you really choose?
- 1% The addict could have chosen otherwise — that's why recovery is real. on Are addicts responsible for their addiction?
- 1% An AI without a free will is not the kind of thing that can be responsible. on Should we hold AI systems responsible for what they do?
Real as relations — neither pure substance nor pure construction.
14 schoolsOn this view, the physical world is real, but its reality is the reality of a pattern: the standing relations among things, processes, and ancestors. Asking whether matter is mind-independent imposes a substance-language the view doesn't accept. What is real is the relational fabric; matter is one of the ways that fabric shows up.
Where this stance leads ⓘ
- 1% Matter is constituted by relations; the question of 'from what?' presupposes substance. on Is the world created from nothing?
- 1% Matter has intrinsic moral standing as part of the relational fabric. on Does matter have intrinsic moral standing?
- 1% Personhood is conferred by being-in-relation. on When does a person begin?
- 1% Marriage is constituted by the web of relations it creates. on What is marriage?
- 1% Money is the ledger of obligations among real people. on What is money?
Real for this cycle — the deepest reality cycles through creation and dissolution.
9 schoolsOn cyclical views, the physical world is real now, in this cosmic round. Its reality is not eternal; matter emerges from a deeper source and will return to it. The realism-idealism dispute, framed as a once-for-all metaphysical question, is answered at the cosmic-round scale rather than at the absolute one.
Where this stance leads ⓘ
- 1% Matter arises and dissolves through cosmic rounds; neither created from nothing nor eternal. on Is the world created from nothing?
- 1% Matter is in flux; standing is impermanent and ritual-mediated. on Does matter have intrinsic moral standing?
- 1% The future is open and you are a genuine origin of it. on Do you really choose?
- 1% The addict could have chosen otherwise — that's why recovery is real. on Are addicts responsible for their addiction?
- 1% An AI without a free will is not the kind of thing that can be responsible. on Should we hold AI systems responsible for what they do?
Schools the coordinates don't place
These schools don't satisfy any stance's coordinate pattern strongly enough to be assigned — either because they decline to commit on the question (Confucianism is famously silent on what comes after; Pyrrhonian and pragmatist traditions suspend judgment), or because their attribute signature crosses categories in a way the five buckets don't capture.
Related Experiments
Experiments engaging the same dimensions as this dilemma — they\'re where the same questions get stress-tested in cleaner cases.
Related Historical Debates
Historical confrontations where parties argued out questions on these dimensions.