The Same Algorithm in a Different Medium

The Evolutionary Dynamics of Capital Markets

Markets are not like nature. Markets are nature.

This is the claim, and everything that follows is an argument for reading it literally instead of as a figure of speech. When an economy contracts and companies die in waves, when the survivors absorb the territory of the dead and grow larger than any of them had been alone, we reach for the language of biology. We call it a shakeout, a die-off, a consolidation. We assume the borrowing runs one direction, that biology is the real thing and economics is the metaphor wearing its clothes. The assumption is backwards. The two are not joined by resemblance. They are joined by descent.

Descent, Not Resemblance

The distinction that matters here is the one between analogy and homology. Analogy is convergence, unrelated lineages arriving independently at the same solution because the same problem admits the same answer. The eye evolved something like forty separate times in creatures that share no seeing ancestor, because light is light and the physics of focusing it does not change from one body to the next. Homology is different. Homology is shared structure inherited from a common origin, the single ancestral limb that persists across every descendant as a bat’s wing, a whale’s fin, a human hand, the same bones rearranged. When we call a market crash a die-off we assume we are speaking in analogy, laying a poetic overlay from one domain onto another. We are not. We are speaking in homology. The consolidation of an industry and the consolidation of an ecosystem are the same structure inherited from the same source, because both are running on the same substrate.

To name the substrate plainly, we must address that it has three conditions. There must be replication, units that copy themselves forward in time, whether the unit is a strand of nucleic acid or a firm or a business model or an allocation of capital. There must be variation, the copies differing from one another. And there must be differential survival under scarcity, an environment that cannot carry all of them, so that some persist and some do not, and the persistence is not random with respect to the traits the units carry. Any system anywhere with those three conditions running at once will evolve. It does not matter what the replicating unit is made of. The algorithm is indifferent to its medium, and it runs in silicon and carbon and capital without changing its character.

That much, on its own, would prove only convergence. An algorithm that can run in any medium could show up in markets and in ecosystems the way the eye showed up in the octopus and in us, twice, separately, two unrelated systems stumbling onto the same answer because the answer is forced by the problem. That would be analogy after all, and the whole claim would collapse back into metaphor. What saves it is that markets are not an unrelated system. They are built by and out of the organisms that biological selection produced, and run by a primate the same winnowing shaped. Selection did not stop when it finished making the animal. It kept running through everything the animal went on to build. Market evolution is not a second and independent discovery of the algorithm. It is the first process continuing into a medium the process itself grew. The human is inside it, never above it, and that is the fact the rest of this essay keeps returning to.

Set those three conditions running in a niche that fills to its edges and you get more than evolution in the abstract. You get a specific and recognizable sequence. A field blooms past what it can hold. The excess is culled. The survivors inherit the cleared ground. Whether that inheritance settles into a crowded new diversity or collapses into a handful of dominant winners depends on a single variable I will come to, but the sequence that delivers it does not vary at all.

This is also why the sequence is foreseeable, and foresight is the entire reason the argument is worth making. Predictability is a core foundation of the universe. That is a large sentence, and I mean it in a narrow and defensible way. The predictability does not come from anywhere mystical. It comes from selection, which is the one anti-chance force operating inside an evolving system. Variation proposes at random. Selection disposes with no randomness at all. The result is that the path is contingent while the pattern is lawful. You cannot say which particular firm walks out of the winnowing owning the sector, and you cannot say which particular mammal inherits the world once the ground is cleared. You can say, with something close to the certainty of an eclipse, that a field filled past its limit will be culled and that a cull will be followed by inheritance. The forty eyes prove the same thing from the other side. When the outcome is fixed by the structure of the problem, the same answer appears again and again no matter how unrelated the lineages that reach it. The pattern is not a tendency. It is what the algorithm returns.

The first phase is expansion, and in biology it goes by the name adaptive radiation. A niche opens. An asteroid clears the large-bodied incumbents, or a regulatory mandate opens a market, or a technology drops a barrier that had been holding entrants out. Into the vacuum, forms rush. The Cambrian explosion filled the empty seas with body plans so strange most of them left no descendants. The mammalian radiation filled the world the dinosaurs vacated. The dot-com bloom filled the newly commercial internet, and the hundreds of records startups that appeared after the federal government put real money behind digitizing medicine in 2009 filled a market that had not existed the year before. Radiation is exuberant and it is wasteful. It overshoots the carrying capacity of the niche by a wide margin, because at the instant of opening there is no signal yet as to which form wins, and a blind process can only search a space it cannot see by overproducing and letting the environment sort the results. The overshoot is not a flaw in the process. It is the method of the process. And it is precisely what guarantees the culling to come, because what blooms always exceeds what the niche can feed.

The second phase is extinction, and it arrives in two forms whose difference matters less than it first appears. One kind is endogenous. The niche cannot sustain everything that bloomed into it, resources tighten, and the marginal forms starve where they stand. The other kind is exogenous. A shock arrives from outside the system, an asteroid, a rate hike, a credit freeze, and it culls across the board with no regard for how well any given form was adapted to the world that existed the day before it struck. The great Permian extinction was largely exogenous and it erased more than ninety percent of marine species regardless of their fitness for the ocean they had lived in. The freeze of 2008 can be read either way, as a shock that blew in from the financial weather or as a system that had overshot its own footing and collapsed from the inside, and the argument does not need you to settle which. Both readings are biological. The endogenous crash is if anything the more common of the two. A population that breeds past what its range can feed does not wait for an asteroid. It crashes on its own, from the inside, because the overshoot always carries the correction folded inside it, and that is the same event as a sector that levers past what its cash flows can carry and detonates with no help from outside. Most real extinctions are a blend, a niche already strained past its limit and then struck by a shock that finishes what scarcity had started.

The Author Is an Instrument

Here the homology appears to break, and the objection is a serious one. When the Permian oceans acidified, no one chose which lineages ended. When the credit froze, someone did. Someone sat in a room and decided which firms were too large to be permitted to fail and which households would lose their homes. The natural cull is blind and answerable to nothing. The financial cull has a name, an address, and a signature on the order. It seems self-evident that a process with an author belongs to a different category than a process with none, and that to call the second one selection is to dress a human decision in a biology it does not share.

It seems self-evident, and it is wrong, and seeing exactly why is the point the whole essay has been walking toward. The man in the room is not standing outside the dynamics handing down verdicts upon them. He is inside them. He was produced by them. He is an organ the system grew in order to perform a function it could not perform in a medium without brains. His deliberation is entirely real. He weighs and agonizes and believes he is choosing, and at the scale of his own life he is choosing. At the scale of the system his choosing is the mechanism’s method of execution. Capital concentrating toward its survivable configuration, in a medium that happens to have evolved deliberating primates, does not look like an acidifying ocean. It looks like a committee reaching a decision. The committee is what selection looks like from inside one of its own instruments. This is the same fact the substrate turned on several steps ago, that the human is never above the process and only ever inside it, now wearing a face and holding a pen.

None of this is a way of excusing him, and the essay refuses to let it become one. The choice is morally real and it should be named for what it is, which is that some people kept their firms and their homes because of who they were and how close they stood to the center, and others lost everything for exactly the same reason, and calling the event selection does not launder the violence out of it. Both truths hold at once and neither is allowed to dissolve the other. The bailout was a sovereign moral act by human beings who answer for it. The bailout was also a transmission mechanism for capital moving toward its concentrated resting state. A keystone predator regulates the system it culls without any idea that it is regulating anything. The man in the room knows, and his knowing changes his moral standing without changing his structural function in the least. He is responsible and he is an instrument, and these do not cancel. The oldest arguments about freedom and providence held both of these together for centuries without strain, a real agent doing real work and answering for it, inside a larger order that did not depend on him to unfold. The market is only the newest medium in which that same double truth appears.

Inheritance, Not Victory

The third phase is recovery, and it does not restore the crowded field that came before. What comes back is the recovery fauna. The survivors inherit a world swept empty of competitors and they radiate into the vacated space, and because they inherit territory rather than contest it, they grow larger and more dominant than anything the pre-extinction world had contained. The mammals were already present for more than a hundred million years before the asteroid, small and nocturnal and marginal, pinned down by incumbents that held every large-bodied niche. They did not win by defeating the dinosaurs. They won because the ground was cleared while they happened to be standing on it.

Here the two media part on the surface, and the reason they part is the variable I promised. When the mammals inherited the emptied world they did not collapse into a single winner. They radiated into thousands of forms, because the resource they were dividing, the living space of an entire planet, could be partitioned. One lineage took the night air, another the open plain, another the sea, and each could hold its share without seizing anyone else’s. A prize that can be divided produces many winners on the far side of a cull. A prize that cannot produces the opposite. Biology knows this outcome too. Put two species onto one resource that cannot be split and one of them drives the other out. Ecologists call it competitive exclusion, and it is the same shape as a market left with a single survivor.

So the difference between an ecosystem that ends in many winners and a market that ends in few is not a difference in the law. It is a difference in the prize. Living space and food come in kinds that can be divided. Capital does not. It is fungible to the point of being the same substance everywhere, and it pays increasing returns to whoever gathers the most of it, so the firm that inherits the cleared market does not settle into a share beside its neighbors. It compounds, and the compounding draws the territory of everyone still standing toward the largest survivor. This is why market consolidation is not merely as lawful as the biology. It is more lawful, the same tide with the friction taken out.

The company that walks out of the shakeout owning the sector did not necessarily build the best product during the bloom. It survived the cull with its capital intact and inherited the customers and the talent and the territory of everything that died around it. Post-extinction dominance is an inheritance and not a victory, and it looks like genius only to those who arrived after the ground was cleared and never saw the clearing.

The reason to see all of this clearly is not cynicism. It is foresight, and foresight is the only durable advantage there is. If consolidation were an accident, a thing that happened or failed to happen depending on the moods of the men in the rooms, then the most anyone could do is wait and react to it after the fact. But it is not an accident. It is the lawful output of an algorithm running on a saturated niche, as reliable as a tide, and a lawful process can be anticipated by anyone willing to understand it rather than merely witness it. You can watch a field bloom past its niche and know the cull is coming. You can watch the cull run and know the ground is about to pass to whoever kept their capital intact. You can arrange to be the one who inherits rather than the one who is inherited. Predictability is a core foundation of the universe, and it does not surrender that status when the medium becomes capital instead of carbon. The same order that lets us name the hour of an eclipse lets us name the shape of a consolidation. The men in the rooms will go on believing themselves the authors of what is in truth occurring through them. The ones who understand the dynamics will build accordingly, and they will be building on the firmest ground that exists, which is a law and not a guess.