Compatibilism
Can free will and determinism both be true at once?
Free will, properly understood, is compatible with determinism. The dominant view among philosophers in PhilPapers surveys.
The proposition, plainly stated
A theoretical proposition with empirical implications. Here's what it actually says.
Compatibilism is the view that free will and determinism are not in conflict — that being free just means acting on your own desires, reasoning, and values without external coercion, and that this is fully compatible with your choices being part of the causal order. It's the standard position in academic philosophy. Critics on the libertarian side argue it redefines 'free' so weakly that even a chess-playing computer would qualify.
The strongest arguments in favour
Before examining the objections — here are the reasons thoughtful people take this seriously, regardless of where it ultimately lands.
- 01Largest share of professional philosophers (≈ 60% in PhilPapers surveys) hold a compatibilist view.
- 02Defended in detail by Frankfurt, Dennett, Strawson and many others.
- 03Aligns with how legal and moral systems actually treat responsibility.
The strongest objections
Now the other side. These are the most compelling reasons to remain skeptical.
- 01Critics argue it changes the subject rather than solving it.
- 02Doesn't satisfy strong libertarian intuitions.
- 03Relies on contested definitions of 'free'.
Where this stands
Having seen the best case on both sides, here is our overall read.
Compatibilism reframes free will as the kind of agency that actually matters: acting from one's own values and reasons, free from coercion. On this reading, determinism does not threaten the kind of freedom we care about.
That responsibility, agency and reasoning can be preserved without metaphysical libertarianism.
That ultimate metaphysical freedom in the libertarian sense exists.
Phenomenon vs interpretation
The signature distinction. We score the underlying observation separately from the metaphysical framework usually attached to it.
Evidence the reported observation is real.
Evidence the bigger explanation is correct.
Headline score (defaults to phenomenon score for phenomena).
Distance between data and conclusion.
What a thoughtful person might do with this
Hold yourself and others responsible for choices; the metaphysical debate doesn't undo it.
How belief in this can go wrong
Can be used to dismiss real questions about systemic causes of behaviour.
Audit trail
The 11 internal criteria informing the headline scores. They're not arithmetically averaged — they're the audit trail.
Related research reports
Longer synthesis pages that place this claim inside a wider evidence cluster.
Related claims
Sources & Further Reading
Our goal is to link to original studies, academic sources, and serious critiques wherever possible. Scores are provisional until sources are verified.
Primary sources
Free Will
Establishes the philosophical landscape any modern empirical claim about free will is sitting inside.
Compatibilism
The default canonical reference for what compatibilism actually claims, against which most popular versions are pitched.
Causal Determinism
Useful for separating physical determinism (a contested empirical claim) from determinism in the popular sense.