No Trivial Choices

Radical contingency and the causal lattice

In the summer of 1579, Francis Drake sailed the Golden Hind up the west coast of North America and passed, without ever seeing it, the mouth of one of the greatest natural harbors on Earth. Dense coastal fog hid the entrance to San Francisco Bay. Had the fog thinned for even an hour, Drake would have found the harbor, England might have planted its colonies on the Pacific centuries early, and the geopolitical history of the world would have run down a different channel. The hinge of continents was a patch of weather on a single day.

Everyone accepts stories like this one. Everyone has a private version — the train missed by seconds that led to a meeting, a friendship, a career. And nearly everyone files these stories under rare exception: charming flukes at the margin of a history that mostly absorbs small differences and moves on. Big causes for big effects; the trivia washes out.

This chapter argues for a narrower correction. Tiny differences can sometimes amplify into large consequences, and we often cannot know in advance which ones will. Brian Klaas makes the empirical case in Fluke: Chance, Chaos, and Why Everything We Do Matters.¹ The physics supports sensitivity in particular regimes, not the universal claim that every small cause inevitably reshapes the world. The practical lesson is uncertainty about causal reach, not the impossibility of inconsequential acts.

The Rubber-Band Model

The intuition worth naming before killing: call it the rubber-band model of history. Michael Shermer holds it explicitly, and most people hold it implicitly. On this model, history has a shape — broad currents of economics, demography, technology, geography — and small perturbations stretch it briefly before it snaps back. Delay a battle by a day, and the war ends the same way. Swap one inventor for another, and the lightbulb arrives on schedule. Contingency is real but local: it jiggles the details while the equilibrium reasserts itself. On the rubber-band model, Drake’s fog is a genuine fork, but forks like it are scarce — most of the fog on most of the days changed nothing.

The model has obvious appeal. It matches how the world feels: I switched the song before leaving the house this morning, and the world looks exactly as it would have looked otherwise. It also flatters our moral bookkeeping, which reserves seriousness for the big decisions — careers, marriages, votes — and writes the rest off as noise.

But the rubber-band model becomes unreliable when it assumes that all relevant dynamics are convergent. Some systems and regimes are chaotic; others contain damping, attractors, error correction, or robust macrovariables. Weather, brains, traffic, markets, and social systems mix amplifying and stabilizing processes. The empirical question is which dominates at the scale and horizon we care about.

Chaos Plus Branching

Two facts of physics, taken together, make radical contingency compulsory rather than occasional.

The first is classical chaos: sensitive dependence on initial conditions. In a chaotic system, a difference too small to measure grows exponentially until it dominates the trajectory. This is why weather forecasts die at two weeks — not for lack of data or computing power, but because the atmosphere manufactures macroscopic divergence out of microscopic difference as a matter of course.

The second is quantum branching. In the Quantum Branching Universe (QBU), unitary evolution and decoherence support emergent record histories at a declared grain; specified outcome sectors carry objective Measure without branches becoming countable worlds. And as Everett’s Demon showed, some microscopic differences do not stay microscopic: neural noise, molecular collisions, and thermal fluctuations can amplify quantum differences into divergent macroscopic outcomes — different chess moves, different sentences, different decisions — across ordinary life.

Put the two together. Quantum dynamics supplies microscopic variation, and chaotic regimes can amplify some of it into macroscopically distinct histories. Many other differences remain locally irrelevant or are damped by stable dynamics. Microscopic insignificance alone cannot prove future irrelevance, but neither branching nor chaos guarantees unlimited amplification.

For a while, divergence may be invisible. Two modeled histories that differ by one switched song can later converge in every macrovariable we track, or diverge through a chain of interactions. Which occurs depends on coupling, stability, and horizon.

The Cascade

Follow one trivial act all the way down.

You delay leaving the house by three seconds to switch songs. You reach the corner as a stranger crosses who, in the other branch, has already passed. You exchange a glance, a word, a future. Ten years later, that meeting has become a relationship, a child, a lineage. The world now contains a different population of human beings — different minds that will design different tools, write different laws, make discoveries that never occur in the branch where the song played on.

The most secure link sounds like science fiction: fertility itself is chaotic. Which sperm reaches which egg depends on timing differences smaller than a heartbeat — a pause, a breath, a moment’s distraction upstream of conception, and a different person exists, or none does. Every human alive is downstream of an unbroken chain of such coin-edge events. Perturb any link — cross the street two seconds later, hold the elevator, don’t — and within a generation the perturbation is not a different version of history. It is a different cast. Different people mean different marriages, companies, movements, technologies, theories. The entire shape of civilization diverges, and Drake’s fog turns out to be not an exception to how history works but a specimen of its every moment.

Notice what this does to the notion of scale. In a recursive system, “small” is an illusion of resolution. A choice that shifts your mood for a fraction of a second changes your tone in the next conversation, which changes how someone feels about you, which changes an edge in the social graph of the world — and the social graph is precisely the network through which everything else propagates. Within a few decades, those perturbations have rewritten the human network entirely. The world you inhabit is the emergent consequence of incalculably many such micro-decisions, stacked and multiplied across time. The future will be, too. The distinction between the trivial and the profound is not a fact about acts; it is a failure of resolution in the observer.

Consequence Without Control

If everything matters, how do we bear the weight of it? The realization tends to provoke either awe or anxiety, and the anxiety comes from a confusion: from hearing every act has unbounded consequences as you are responsible for computing them. You are not, because you cannot. The web of consequence is chaotic by construction; no agent inside it can trace where any act leads. Drake could not have known what the fog was deciding, and you cannot know what the song is deciding either.

What the physics recommends is epistemic humility about the category. Few acts are literally outside the causal lattice, but many effects are negligible for a declared purpose and horizon. “Trivial” should be a model-relative judgment, not a metaphysical exemption or a source of constant moral burden.

In QBU terms, a choice is part of a physical process that can change conditional distributions over later high-level outcomes. Some changes are large, some small, and some vanish under the coarse-graining relevant to the question. Quantum Free Will develops this causal reading; it does not provide a universal lower bound on meaningful effects. The normative consequences belong to Measure Responsibility.

So the answer is calibrated attentiveness. You cannot compute the full web of consequence, but you can focus on foreseeable effects, robust policies, and opportunities where small interventions plausibly amplify. Attentiveness improves control; it does not literally refine or scatter amplitude. Agency begins where attention corrects for causal blindness.

The End of Triviality

Klaas’s examples show that tiny differences can produce radically divergent futures. This is not a universal theorem: chaotic amplification is regime-dependent, and damping is ubiquitous too. The fog off the Golden Gate illustrates a possibility that complex systems repeatedly create, not an inevitable fate for every perturbation.

There are small acts, but size at one scale does not fix consequence at another. The song you choose, the moment you pause, the word you speak or withhold enter a causal network whose important effects are only partly predictable. Causation is continuous; significance is conditional.