Few ideas have been as influential—and as quietly perplexing—as this one. In philosophy and logic, we speak of “possible worlds” to analyse necessity, contingency, and counterfactuals. From this practice arises a deeper question: do these possible worlds actually exist?
“Are there possible worlds?” appears to ask whether reality consists not only of what is actual, but of many equally real alternatives.
But this framing depends on a prior move: treating modal variation within systems as if it required the existence of multiple fully realised worlds.
Once that move is examined, the question no longer concerns a hidden plurality of realities. It reveals a familiar distortion: the reification of structured possibility into parallel ontological domains.
1. The surface form of the question
“Are there possible worlds?”
In its everyday philosophical form, this asks:
- whether alternative ways things could have been actually exist
- whether necessity and possibility require real worlds
- whether our world is one among many
- whether modal statements refer to concrete domains
It presupposes:
- that possibilities must be realised somewhere
- that modal reasoning requires ontological commitment
- that “worlds” are the units of possibility
2. Hidden ontological commitments
For the question to stabilise, several assumptions must already be in place:
- that possibility is a kind of existence
- that variation requires instantiation in parallel domains
- that modal language refers to entities
- that completeness (a “world”) is required for coherence
- that abstraction implies ontology
These assumptions convert modal structure into ontological population.
3. Stratal misalignment
Within relational ontology, the distortion involves reification, duplication, and modal inflation.
(a) Reification of possibility
Possibility is treated as a thing.
- instead of structured potential within systems
- it becomes something that must exist
(b) Duplication of reality
Alternatives are treated as parallel worlds.
- instead of variations within a single relational field
- they are projected as separate domains
(c) Modal inflation
Abstract tools are ontologised.
- the usefulness of “possible worlds” in logic
- is taken as evidence of their existence
4. Relational re-description
If we remain within relational ontology, there are no “possible worlds” as independent entities. Rather, possibility is structured variation within relational systems under constraint.
More precisely:
- systems define patterns of constraint that shape how instantiation can occur
- these constraints allow for multiple possible trajectories
- modal reasoning articulates these variations abstractly
- “possible worlds” are formal constructs used to organise these variations
From this perspective:
- possibility does not require separate worlds
- it exists as structured potential within systems
- modal language tracks relations between actual and possible configurations
Thus:
- “possible worlds” are not places
- they are tools for modelling relational variation
5. Dissolution of the problem-space
Once possibility is no longer reified, the question “Are there possible worlds?” loses its structure.
It depends on:
- treating possibility as existence
- duplicating reality into parallel domains
- inflating formal tools into ontology
- assuming variation requires instantiation elsewhere
If these assumptions are withdrawn, there are no additional worlds to locate.
What disappears is not modality, but the idea that it must be grounded in multiple realities.
6. Residual attraction
The persistence of the idea is entirely understandable.
It is sustained by:
- the success of possible-world semantics in logic
- the intuitive sense that things could have been otherwise
- the clarity of treating alternatives as complete scenarios
- philosophical traditions of modal realism
Most importantly, “possible worlds” are useful:
- they organise reasoning about necessity and contingency
- they make complex modal relations tractable
This utility encourages ontological commitment.
Closing remark
“Are there possible worlds?” appears to ask whether reality includes multiple fully realised alternatives.
Once these moves are undone, the plurality dissolves.
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