Does special relativity necessarily entail accepting the B-theory of time, and does this require abandoning a particular conception of God acting in time?

Special relativity—formulated by Einstein in 1905 and confirmed by thousands of experiments since—poses a profound philosophical challenge to our understanding of time, and consequently to our understanding of God's relationship to time. The question of relativity's relationship to the B-theory of time (static eternity) and its impact on divine action lies at the heart of contemporary philosophy of physics and its intersection with philosophical theology. The discussion reveals the tension between the physical and religious pictures of reality.

Inadequate Responses to Avoid

From some defenders of classical theism:

"Relativity is just a theory, it might be wrong." This ignores scientific reality. Special relativity is one of the most empirically confirmed theories in the history of science, from GPS to particle accelerators. Wholesale rejection is not a serious scientific position.

"Physics has nothing to do with metaphysics." This is an artificial separation. Relativity makes claims about the structure of spacetime that have direct metaphysical consequences. Complete disregard for physics in philosophical discussions about time is an incoherent position.

"God is completely outside time, so there's no problem." This is an oversimplification. Even if God is outside time, the question of how God acts in time remains. Theistic religions affirm a God who acts in history, and this needs explanation.

From some naturalists:

"Relativity refutes any conception of God acting in time." This is an unjustified leap. Relativity poses constraints on our understanding of time, but it doesn't definitively settle the metaphysical question about the nature of time.

"The B-theory of time is an established scientific fact." This confuses physics with philosophical interpretation. Relativity is consistent with the B-theory, but doesn't logically entail it. There are alternative interpretations (neo-Lorentzian) that preserve the A-theory.

Why These Responses Are Inadequate

They share a failure to distinguish between levels of discussion: the physical level (what does relativity say mathematically?), the philosophical level (what is the metaphysical interpretation of relativity?), and the theological level (what are the implications for divine action?). Serious discussion requires addressing all three levels.

Special Relativity and the Structure of Spacetime

Special relativity rests on two principles:
1. The speed of light is constant for all observers
2. The laws of physics are identical in all inertial reference frames

The stunning result: relativity of simultaneity. Events that are simultaneous in one reference frame may not be simultaneous in another. There is no absolute "cosmic now."

This leads to the picture of 4D spacetime block: the universe is not a three-dimensional space evolving in time, but a four-dimensional "block" where time is a fourth dimension. Events don't "happen," they "exist" at their spacetime locations.

A-Theory and B-Theory of Time

A-theory (presentism): Only the present truly exists. The past "was" and the future "will be." Time flows, and "now" moves.

B-theory (eternalism): All temporal moments exist to the same degree. Past, present, and future exist "together" in spacetime. No real flow, only "before/after" relations.

The Argument from Relativity to B-Theory

The standard argument (Rietdijk-Putnam):

1. In relativity, there is no absolute simultaneity
2. If the A-theory is correct, there must be one cosmic "present"
3. But relativity denies the existence of a cosmic present
4. Therefore the A-theory is false, and the B-theory is correct

This argument is strong but not decisive. Critics propose alternatives.

Philosophical Alternatives

First: Neo-Lorentzian (Craig, Tooley)

One can accept all of relativity's predictions while maintaining a metaphysically privileged reference frame (though physically undetectable). This preserves absolute simultaneity and a cosmic "now."

Criticism: This adds metaphysical structure that contributes nothing to physical predictions. It seems to violate Occam's razor.

Reply: Physical simplicity isn't the only metaphysical simplicity. The cost may be justified to preserve our intuitions about time.

Second: Point Present

Instead of a spatially extended "present," one can conceive of a point present for each observer. Each point-event has its own "present."

Criticism: This fragments the unity of the universe. How do we understand "cosmic present" if each event has its own present?

Third: C-Theory (Growing Block)

Past and present exist, the future doesn't exist yet. The universe "grows" in time.

Criticism: Faces the same problem of determining the "edge" between existing and non-existing in relativity.

Implications of B-Theory for Divine Action

If the B-theory is correct, theological challenges arise:

First: The Problem of Temporal Action

In the B-theory, all events "exist together" in spacetime. How can God "act" at a particular moment? Action seems to require change, and change requires the A-theory.

Second: The Problem of Answering Prayer

If the future exists to the same degree as the present, how can God "respond" to prayer? Response seems to require that the future be open.

Third: The Problem of Divine Providence

Divine providence is traditionally understood as divine guidance of events toward ends. In the B-theory, events are "complete" in spacetime. Where is the scope for providence?

Theological Responses

First: Classical Divine Eternity (Boethius, Aquinas)

God is completely outside time, seeing all spacetime "at once." Divine action is not "in" time but "grounds" all spacetime.

Strength: Consistent with the B-theory. God doesn't need to "intervene" in time.

Weakness: Seems to deny special divine action and personal relationship with humans.

Second: Modified Divine Temporality (Swinburne, Hasker)

God is in time but in a special way. God experiences a succession peculiar to Godself, different from physical time.

Strength: Preserves divine action and personal relationship.

Weakness: Raises questions about the relationship between "God's time" and physical time.

Third: Reconciliation via Quantum Measurement Theory

Some philosophers (Stapp, Hodgson) propose that quantum mechanics restores an element of "becoming" to reality. God might act by influencing quantum collapse.

Criticism: This depends on a controversial interpretation of quantum mechanics.

Contemporary Discussion (2015-2026)

The "temporal realism" current (Dean Zimmerman, William Lane Craig) defends the A-theory despite relativity, via neo-Lorentzian or alternative interpretations.

The "modified eternity" current (Eleonore Stump, Brian Leftow) develops an understanding of divine eternity that preserves a kind of divine action within the B-theory.

The "scientific theology" current (Robert Russell, John Polkinghorne) seeks models of divine action consistent with contemporary physics.

The Deeper Philosophical Point

The fundamental question: Does physics determine metaphysics?

The scientistic position: Yes, confirmed physical theories determine what we should believe metaphysically.

The pluralist position: Physics constrains but doesn't determine metaphysics. Multiple metaphysical interpretations of the same physical theory are possible.

Relativity and the B-theory are an excellent example: relativity makes the B-theory "natural," but doesn't logically entail it. Alternatives are possible, though more costly.

From the Perspective of Rational Preponderance (rajḥān ʿaqlī)

Relativity and divine action illustrate the complexity of preponderance at the intersection of science and theology:

- Relativity strongly supports the B-theory, but without definitive resolution
- The B-theory poses challenges to traditional divine action
- There are coherent theological responses, but with different costs
- Preponderance depends on priorities: scientific simplicity or religious intuition?
- No final resolution, but a balancing of competing considerations

Relativity doesn't "refute" divine action.

Where We Stand in This Discussion Today

The discussion around relativity, time theory, and their theological implications has shown notable maturation between 2020 and 2026. On the physical front, attempts to build a theory of quantum gravity have been strengthened, and some approaches—like loop quantum gravity—restore a fundamental role to time in the ontological structure, weakening the direct inference from relativity to the B-theory. In philosophy of physics, the consensus that relativity "settles" the debate in favor of static eternity has declined; works by Christian Wüthrich (2021) and Huggett (2023) have shown that the transition from physics to metaphysics is more complex than it appears. On the theological side, more precise models have developed: Dean Zimmerman continued defending neo-Lorentzian presentism (2021), while Alan Padgett and William Lane Craig developed models of divine temporality that don't depend on rejecting relativity but on distinguishing between metric time and ontological time. Today's landscape is more modest: neither physicists claim to settle metaphysics, nor theologians ignore physics. The intersection between the fields has become more productive and less polarized.