Relativity revolutionised physics by dissolving the absolute backdrop of Newtonian space and time. Space and time were no longer separate containers but fused into spacetime. Yet out of this insight came one of physics’ most tenacious evasions: the block universe.
The evasive manoeuvre
The block universe takes spacetime as a four-dimensional slab, already complete from beginning to end. Past, present, and future are equally real; the entire history of the cosmos is laid out “all at once.” What we experience as the flow of time is relegated to illusion, a parochial trick of consciousness.
Why does this picture persist? Because it preserves the mathematical elegance of relativity. Treating the cosmos as a fixed four-dimensional geometry keeps the equations neat and symmetric. But the neatness comes at an ontological cost.
The ontological cost
In the block universe, possibility is frozen. The future is no less determined than the past; becoming is erased. Individuation can no longer emerge, since all events already exist. Relation collapses into geometry, a static adjacency with no openness.
This is not merely determinism; it is the denial of temporality itself. The world becomes a sculpture, not a process. Construal, alignment, emergence—these are written out of the script.
The epistemic collapse
If the block universe is true, then the very practice of science is incoherent. Experiment depends on temporal unfolding: posing a question, intervening, waiting for an outcome. But if outcomes are already fixed in the block, experiment is just our traversing of a pre-laid track. Inquiry becomes a form of tourism through an already-finished landscape.
More subtly, the block universe deprives science of its own reflexivity. Scientific practice is itself a temporal process of conjecture, critique, and revision. To deny the openness of time is to deny the openness of science itself.
The theological return
Once again, what presents itself as “hard-headed” physics smuggles in theological undertones. The block universe is a cosmic manuscript, already authored, where becoming is replaced by eternal inscription. It echoes the ancient image of the book of fate: everything already written, nothing truly unfolding.
A relational reframing
Relational ontology does not require such evasions. Time is not an illusion to be explained away, but the very mode of perspectival actualisation. Becoming is real because relation individuates and aligns in ways that cannot be pre-scripted. Possibility is not the weak shadow of a fixed block; it is the condition for emergent construals of reality.
From this view, relativity’s real insight is not that time is illusory, but that the separation of time and space was always perspectival. Relation unfolds across multiple horizons, but this does not erase temporality—it multiplies it.
Conclusion
The block universe is not a courageous extrapolation of relativity but an evasion: freezing time to preserve equations, even at the expense of ontology and epistemology alike. What physics calls elegance here is, in truth, paralysis.
The alternative is not to retreat into illusionism, but to affirm the openness of time as relational becoming. Only then can physics move beyond the block and into the living cosmos it seeks to understand.
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