Presentism — only the present is real
Is only the present moment real?
The natural common-sense view: only what exists now exists. Hard to reconcile with relativity but not refuted.
The proposition, plainly stated
A theoretical proposition with empirical implications. Here's what it actually says.
Presentism is the view that only the present moment is real — the past has happened and is gone, the future hasn't happened yet. It matches our ordinary experience of time but sits uneasily with relativity, which makes 'now' observer-dependent. Defenders argue that physics is incomplete on this point; critics argue presentism imposes a privileged frame that the equations don't license.
The strongest arguments in favour
Before examining the objections — here are the reasons thoughtful people take this seriously, regardless of where it ultimately lands.
- 01Strong intuitive appeal.
- 02Some philosophers (Bourne, Markosian, Craig) defend it carefully.
- 03Compatible with proposed neo-Lorentzian readings of relativity.
The strongest objections
Now the other side. These are the most compelling reasons to remain skeptical.
- 01Relativity of simultaneity makes any global 'now' problematic.
- 02Requires either a preferred frame or careful semantic moves.
- 03Minority view in contemporary philosophy of physics.
Where this stands
Having seen the best case on both sides, here is our overall read.
Presentism is the natural common-sense view and remains a respectable minority position. Reconciling it with relativity requires either a preferred frame or a substantial reinterpretation.
That eternalism is not the only philosophically defensible view of time.
That past and future are unreal.
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
Be aware that 'now is all there is' is one defensible view; not the only one.
How belief in this can go wrong
Risk of dismissing physics-based arguments out of intuition.
Audit trail
The 11 internal criteria informing the headline scores. They're not arithmetically averaged — they're the audit trail.
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
Explains what each of the time-models actually claims before any physics is brought in.
Being and Becoming in Modern Physics
Direct treatment of the physics-of-time question — exactly the territory the block-universe claim lives in, without reducing the debate to a slogan.
Further reading
Being and Becoming in Modern Physics
The standard reference for the relativity-based case for a block universe and a useful counterweight to overly simple 'physics proves fate' claims.