Libertarian free will
Are we genuinely free, beyond physical causation?
The strong claim that decisions are not fully determined by prior physical causes. Philosophically defended; no demonstrated mechanism.
The proposition, plainly stated
A theoretical proposition with empirical implications. Here's what it actually says.
Libertarian free will is the claim that humans have a kind of agency that isn't fully determined by prior causes — that some of our choices originate with us in a way that breaks the chain of physical causation. It contrasts with determinism on one side and with compatibilism on the other. The position is what most ordinary moral and religious thought presupposes; in academic philosophy of mind it is a minority view.
The strongest arguments in favour
Before examining the objections — here are the reasons thoughtful people take this seriously, regardless of where it ultimately lands.
- 01Felt sense of choosing is intuitively undeniable.
- 02Quantum indeterminacy provides a possible (small) opening.
- 03Defended by serious philosophers (Kane, Chisholm, Plantinga).
The strongest objections
Now the other side. These are the most compelling reasons to remain skeptical.
- 01Quantum noise is not the same as agency.
- 02Libet-style experiments raise questions about timing of conscious decision.
- 03No proposed mechanism.
Where this stands
Having seen the best case on both sides, here is our overall read.
Strong libertarian free will requires genuine indeterminacy in decision-making not reducible to neural noise. Defenders argue from phenomenology and moral responsibility; mainstream science finds no mechanism.
That the question of free will is philosophically alive and not closed by neuroscience.
That a non-physical agent intervenes in physical causation.
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
Take agency seriously; do not pretend metaphysical questions remove practical responsibility.
How belief in this can go wrong
Misused on both sides — to claim too much agency or to deny it entirely.
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.
Time of conscious intention to act in relation to onset of cerebral activity (readiness-potential): The unconscious initiation of a freely voluntary act
The single study most often cited as evidence against libertarian free will. Almost every later debate is downstream of it.
Challenging / sceptical perspectives
An accumulator model for spontaneous neural activity prior to self-initiated movement
Major reinterpretation of Libet — important counterweight to popular 'neuroscience disproves free will' framing.