Here is a claim that appears in serious physics journals, discussed by physicists who hold positions at respected universities and publish in mainstream venues: the future can influence the past.
Not in a vague, metaphorical, or mystical sense. In a precise, mathematically specified, experimentally testable sense. The claim is called retrocausality — backwards causation, the idea that causal influence can run backward in time as well as forward — and it is one of several interpretations of quantum mechanics that physicists have proposed to resolve deep puzzles about the nature of time, measurement, and the relationship between quantum and classical physics.
This is not a claim that retrocausality is established, or that it’s the dominant view in physics, or that it validates divination in any simple sense. It is a claim that retrocausality is a live scientific idea — seriously proposed, formally developed, with experimental predictions that differ from the standard quantum mechanical account — and that understanding it changes the terms of the conversation between science and divinatory practice in ways that are worth taking seriously.
The Problem Retrocausality Is Trying to Solve
To understand retrocausality, you need to understand the puzzle at the heart of quantum mechanics called the measurement problem.
In standard quantum mechanics, physical systems exist in superpositions — they are in multiple states simultaneously until a measurement is made. Before you measure the spin of an electron, it is in a superposition of “spin up” and “spin down.” The moment you measure it, the superposition “collapses” to a definite state. The measurement determines the outcome.
This collapse is conceptually strange for several reasons. It appears to be instantaneous and non-local — in quantum entanglement experiments, measuring one particle of an entangled pair instantaneously affects the state of the other particle, regardless of the distance between them. And it appears to violate the time-symmetry of the fundamental equations of physics: the equations of quantum mechanics work equally well run forward or backward in time, and yet the collapse of the wave function happens in one direction only.
The standard interpretation (the Copenhagen interpretation) essentially brackets these puzzles by saying: measurement happens, collapse happens, don’t ask what collapse is or why it’s one-directional. This is pragmatically effective — quantum mechanics is the most precisely tested physical theory in history — but it leaves the conceptual puzzles unaddressed.
Retrocausality is one of several attempts to address them by proposing that the apparent collapse is not a fundamental physical process but an artifact of looking at the situation with a forward-in-time bias. The proposal: what we call “measurement collapse” is actually the intersection of an ordinary forward-causal process with a backward-causal process. The particle’s behavior is determined not only by what happened in its past but also by what will happen in its future.
The Key Proposals
Several physicists have developed retrocausal interpretations of quantum mechanics with varying degrees of formal development.
The two-state vector formalism, developed by Yakir Aharonov and colleagues beginning in the 1960s, is the most mathematically developed retrocausal framework. In this formalism, a quantum system’s state is described by two vectors: one propagating forward in time from the initial preparation and one propagating backward in time from the final measurement. The observable behavior of the system is determined by both. Aharonov has argued that this formalism resolves several puzzles about “weak measurements” — minimally disturbing measurements — that are difficult to explain in the standard forward-only framework.
The transactional interpretation, proposed by John Cramer in 1986, describes quantum interactions as “transactions” — agreements between a forward-propagating “offer wave” and a backward-propagating “confirmation wave” that together determine the outcome. The transaction is symmetric in time: emitter and absorber negotiate the exchange across time as well as space. Cramer and Ruth Kastner have continued developing this framework, which has attracted both serious engagement and substantial criticism.
The retrocausal toy models developed by Huw Price, Ken Wharton, and colleagues represent a more formal approach: developing specific toy models that demonstrate how a retrocausal mechanism could reproduce quantum mechanical predictions while restoring classical realism. Their work has appeared in peer-reviewed physics journals and generated substantial critical engagement from the broader physics community.
All of these proposals are minority positions within physics — the mainstream remains committed to the Copenhagen interpretation, the Many-Worlds interpretation, or other forward-causal approaches. But “minority position in physics” is not the same as “fringe idea.” These are formally developed proposals by credentialed physicists published in respected journals, part of a live debate about the interpretation of the best-confirmed physical theory in history.
What Retrocausality Does Not Mean
Before connecting retrocausality to divination, several common misunderstandings need clearing up.
Retrocausality does not mean you can send information back in time. All the serious retrocausal proposals are explicitly designed to be consistent with the no-signaling theorem — the result in quantum mechanics showing that quantum correlations cannot be used to transmit information faster than light or backward in time. The retrocausal influence in these proposals is physically real but informationally inaccessible: you cannot use it to place a bet on yesterday’s horse race. The causal influence runs backward, but it doesn’t carry usable information in a way that would allow paradoxes.
Retrocausality does not vindicate magical thinking. The proposals concern specific, mathematically precise modifications to quantum mechanics applied to microscopic systems. They don’t imply that thinking about future events influences them, or that any particular divinatory practice accesses retrocausal information. The leap from “physicists have proposed retrocausal interpretations of quantum mechanics” to “therefore divination might access the future” is not a small step — it requires a specific proposed mechanism and evidence for it, neither of which exists.
Retrocausality in quantum mechanics operates at the quantum scale. The systems where retrocausal effects are proposed — individual photons, electrons, entangled particle pairs — are not macroscopic brain processes or the complex chain of events constituting a human life. Extrapolating from quantum retrocausality to human-scale precognition requires bridging explanatory gaps that have not been bridged.
Why It’s Genuinely Relevant Anyway
Despite these limitations, retrocausality is relevant to the divination conversation in at least two genuine ways.
It shows that time-symmetric causation is physically coherent. The most common physical objection to any form of precognition or future-oriented knowing is that it violates causality — causes precede effects, information doesn’t travel backward in time, full stop. Retrocausality shows that this objection, while reflecting the standard view, is not settled physics. There are serious proposals for how backward-in-time causal influence could operate consistently with everything we know about quantum mechanics. The door is not closed on physical time-symmetry in the way that confident dismissals imply.
It reframes the philosophical question about prediction. If quantum systems are influenced by their future measurement outcomes as well as their past histories, then the strict separation between past, present, and future is less fundamental than our intuitive experience of time suggests. The philosopher Huw Price — one of the physicists working on retrocausality — has argued extensively that our sense of time’s directionality may be more a feature of our macroscopic cognitive perspective than a fundamental feature of physical reality. At the fundamental level, the laws of physics are largely time-symmetric. The asymmetry of our experience is real but may be emergent rather than fundamental.
This doesn’t prove that divination works. But it does open the question of what “knowing the future” would even mean in a world with time-symmetric causation — a question that is far less clearly answered than the standard dismissal implies.
The Parapsychology Connection
Any serious treatment of retrocausality and divination has to engage with the parapsychological literature on precognition — the claim that humans sometimes demonstrate above-chance performance on tasks requiring knowledge of future events.
The most famous recent study is Daryl Bem’s “Feeling the Future,” published in the Journal of Personality and Social Psychology in 2011, which reported nine experiments finding statistically significant evidence for precognitive effects in ordinary college students. The paper was methodologically sound by the standards of psychological research at the time, which is partly why it caused such consternation — if the methodology was acceptable for other psychology findings, it was acceptable for these.
Replication attempts have been mixed. Several independent laboratories have failed to replicate Bem’s effects. A meta-analysis by Mossbridge, Tressoldi, and Utts in 2012 found positive effects across a larger set of experiments, but subsequent analyses have raised concerns about publication bias. The evidence is inconsistent and controversial, but it has not been cleanly dismissed.
The honest summary: the parapsychological literature contains some findings that are difficult to explain away and many findings that have failed to replicate. It does not provide strong evidence for precognition, but it does not provide strong evidence against it either. The question remains genuinely open in a way that confident dismissals don’t acknowledge.
What This Means for Thinking About Divination
The honest use of retrocausality in thinking about divination is modest but real.
It keeps the possibility space honest. The strong skeptical position — that any form of future-oriented knowing is definitively ruled out by physics — is not well-grounded in the actual physics. Retrocausality shows that time-symmetric causal influence is not immediately inconsistent with known physics. This doesn’t mean divination works. It means the “physics rules it out completely” argument is less airtight than it’s often presented as.
It identifies the right kind of question to ask. If retrocausality were a mechanism through which future states influenced past quantum events, the relevant question would be: is there any evidence that human cognitive or biological systems are sensitive to this retrocausal signal in ways that produce systematically useful information about future states? This is specific and in-principle-testable. The answer from existing research is: weak, inconsistent evidence that has not been reliably replicated. But identifying the question correctly is a step forward from dismissing it as incoherent.
It places divination in the right intellectual neighborhood. The most defensible framing of divination — as a practice for orienting within complex situations, accessing below-conscious models of one’s circumstances, structured reflection on the present moment — doesn’t depend on retrocausality at all. The Whisper’s core value proposition is “reading the present,” not predicting the future. But if there is a genuine element of future-orientation in the best oracular experiences — the sense that the reading is naming not just what is but what is arriving — retrocausality provides at least one framework in which such experiences could be understood without abandoning physical thinking entirely.
The physics of retrocausality is interesting. The philosophical implications are real. Neither validates divination as conventionally practiced. What retrocausality provides is intellectual honesty about the actual boundaries of what physics has ruled out — boundaries that are narrower than confident dismissals usually imply.
The future influencing the past is not a settled impossibility. It is an active area of serious physical research with no consensus. In a field that has been wrong about many things, that should give pause to anyone who claims the physics definitively settles the question of what is and is not possible.