Foundations

The book’s most distinctive moves — the one-sentence definition of morality, the way it relocates “ought,” the claim that standing belongs to agents rather than to the beings acted upon, the stretch of the whole framework out to communities and machines — none of them stand on their own. Each one rests on an earlier decision about how knowing works in the first place, and the main chapters lean on those decisions without stopping to argue for them. This is the essay where they get argued for. It runs more technical than the chapters, because here the terms can be set down exactly and the relevant philosophy met face to face. But it’s the same mind doing the same work, just with the gloves off.

Why three, and why first

A worldview is easier to knock over at its base than at its conclusions. You can win every argument about what’s good and still lose the whole war if someone can answer, with a shrug, “well, that’s just your opinion” — and be right. So before the framework argues about morality at all, it has quietly made three commitments about knowledge and reality, and those three are what carry the weight. Here they are, plainly:

Perspectival realism is the part about knowing. Every agent meets the world only through its own particular standpoint — its Umwelt, its values-model, its methods-model — and yet all those standpoints are looking at one and the same world, a world that doesn’t bend to anyone’s wishes. This is what lets the framework say there are no fixed moral facts without also saying there’s no real world. And it’s what makes agreement possible in the first place: agents out on different branches can find their way back to common ground because they’re modeling the same shared, rooted reality.
Constructivism is the part about value. Values and oughts are made — built up out of what agents construct and converge on as their concern widens — not found lying around in the universe waiting to be dug up. This is what lets the book relocate “ought,” and it’s behind agent-relative standing too.
Functionalism is the part about what things are. Values, methods, agency, and “selves” are picked out by the role they play — by what they do in a setting — not by what they happen to be made of. The book’s line “wisdom is seeing the edges” is this idea worn as everyday perception. And functionalism’s best-known feature, that one role can be filled in many different materials, is the quiet engine behind the framework’s reach: if agency and value are defined by what they do, they can be done in carbon, in institutions, or in silicon alike.

Squeezed down to a single line, the three say: knowledge and value are made, from a perspective, by what works. Made is constructivism. From a perspective is perspectival realism. By what works is functionalism. The rest of this essay does four jobs: it argues for each foundation on its own legs; it shows the three form a tripod and not a closed circle; it points out that this isn’t some private invention but a place several careful traditions arrived at independently; and it answers the one objection all three of them invite.

That objection is worth naming right now, so you can read the whole essay as a reply to it. Each foundation leans away from fixed, mind-independent facts. Stack all three together and a reader is right to wonder whether this is just relativism in a nicer coat — “anything goes,” but with better table manners. The reply, which gets assembled here and then used everywhere else in the book, is one sentence with four parts: situated, constructed, functional models are still disciplined — by a shared reality, by selection for what can actually be lived, by convergence as the context widens, and by the counter-dynamic, which condemns any coherence won by narrowing. Made is not arbitrary. Hold that worry in your head as you read; the last section is the answer to it.

Pillar 1 — Perspectival realism

The claim

Start with the cleanest version of what’s being claimed, because it’s easy to caricature from either side. The claim is this: knowing is always done from somewhere, and it’s still answerable to a world the knower didn’t make. A perspective is neither a prison nor a free pass. It’s a window — and the whole point of a window is that it’s both a limit and an opening. You can’t see through it from everywhere at once; that’s the limit. But what you see through it is the actual street, not a painting of the street; that’s the opening.

This rules out two tidier positions, each one easier to hold and each one false. The first is naive realism, the dream of a view from nowhere: the idea that a disciplined enough mind could shrug off its standpoint completely and report the world exactly as it is in itself, tied to no observer at all. The second is relativism, the view from anywhere: the idea that because every report comes from some standpoint, no report is any better than another, and “true” rots down into “true-for-me.” Perspectival realism is the narrow strip of ground between those two — narrow because each neighbor keeps trying to claim the middle for itself. A lot of the work of this foundation is just holding that ground.

The scholarship it leans on

This position isn’t the book’s own coinage. It’s a living, well-defended view in the philosophy of science, and the smart move is to lean on that defense instead of reinventing it.

Michela Massimi, in Perspectival Realism (2022), gives the most careful modern version. Her realism is realism about phenomena — the stable, repeatable, generalizable patterns we infer from data — rather than realism about whole theories being literally true. And for Massimi, the situatedness of science isn’t a regrettable flaw to be subtracted out; it’s the very thing that makes reliable knowledge possible. Science is a team effort, and its trustworthiness is actually helped by having many historically and culturally situated perspectives cross-checking one another. Her models are “inferential blueprints” — not passive snapshots of reality but working instruments that organize reasoning, license predictions, and support what she calls modal knowledge. The name she gives her project says it all: an “epistemology-first” view.

Ronald Giere gets to a compatible place by a different road, looking for an explicit “middle ground” between science-as-universal-truth and a social constructivism that would cut knowledge loose from the world entirely. His favorite image is the map. A map is obviously a human construction, built for a purpose, and you never judge it simply true or false — you judge it accurate and useful, and only relative to what it’s for. A subway map that lies about distance and angle can still be the best possible map for catching a train. And yet a map answers to the terrain: you really can be wrong about which station comes next. Objectivity, for Giere, isn’t a mirror; it’s a “collective, shared contact” with the world that outlasts the quirks of any single observer.

Paul Teller sharpens the same intuition with two ideas worth keeping. His “Complex World Constraint” is the blunt point that the world is just too intricate, compared to our faculties, for any representation to be exactly right — so perspective isn’t a loss of nerve, it’s a structural necessity; selecting and simplifying are forced moves, not lazy ones. And his “semantic alter egos” make the functional point that a representation which is strictly false but usefully precise (“the table is one meter long”) can do exactly the same work as a fussily accurate one — that representations are tools, rated by what they accomplish. That thought quietly opens the door to the third foundation.

Behind all of this stand two older relatives worth a nod. One is Nietzsche’s perspectivism, the original insistence that there’s no immaculate, organ-free seeing. The other — closer to the book’s heart — is Jakob von Uexküll’s Umwelt: the tick and the physician share a hallway and live in different worlds, each one carved out by what the creature can sense and do. The Umwelt is perspectival realism made flesh: a perspective isn’t an opinion bolted onto a neutral world, it’s the very shape of an agent’s contact with the world.

The threat, and the answer

The standing threat to this foundation is the one already named: perspectival sliding into relativist. If every view is from somewhere, the challenger asks, then by what right do you call one view better than another? Answer that badly and the whole book sinks, because all of its central claims depend on some views being genuinely better than others.

The answer has two moves. The first says exactly what disciplines a perspective — what keeps it from being mere preference. A perspective is held in check by perceived consequences and by viability: by the feedback that corrects a model when the world refuses to go along with it. A map that routes you into the sea gets redrawn, or it gets you killed; either way the terrain has had its say. And notice — the thing doing the disciplining isn’t some privileged perspective sitting in judgment over the rest. There’s no such perspective, and asking for one is just the view-from-nowhere sneaking back in. The thing doing the disciplining is the world itself, met again and again, through action, by perspectives that have to survive the meeting.

The second move gives the ranking a name the rest of the book already uses. Perspectives aren’t all equal, and they aren’t ranked by anyone’s say-so; they’re ranked by coherence over a widening context and by viability. A better perspective is one that holds together while answering to more — more of the world, more of the time, across more of the agents who have to share it. That’s the very same standard the main chapters build toward. And noticing that the knowing-ranking of perspectives and the moral ranking of values turn out to be one and the same ranking is not a coincidence to skim past. It’s the first hint that the foundations and the thing built on top of them are made of one material.

The extension the framework actually needs

Here’s a move the framework has to make out in the open, because Massimi doesn’t make it on the book’s behalf. She defends perspectival realism about science — about how communities of inquirers reach reliable knowledge of phenomena. What the framework needs is perspectival realism about value — about how agents reach better and worse models of what matters. That stretch isn’t free; it has to be argued for.

The argument is that valuing is the same kind of activity as knowing. A values-model is a situated model — built from an agent’s standpoint, its history, its Umwelt — of what’s worth caring about. Like a scientific perspective, it’s neither a view from nowhere nor a free invention; it answers to a reality — the reality of whether an agent, or a “we,” holding those values can actually keep going, can stay coherent and viable as its world gets bigger. Values that demand the world be other than it is, or that fly apart the moment the circle of concern widens, get corrected the same way bad maps do: by the consequences of living them. So the same window that hands an agent its picture of the world hands it its picture of the good, and the same discipline — coherence over a widening context, tested by what can be lived — governs both. Carrying perspectival realism from fact over to value isn’t changing the subject; it’s noticing the subject was one subject all along.

What this pillar gives. With perspectival realism in place, the framework can say two things that sound like a contradiction until you have the window in mind: there’s no fixed, agent-independent moral order, and “who’s to say?” is not a winning move. Both fall out of one stance. There’s no view from nowhere, so there’s no final moral fact stitched into the structure of things; and there’s a real world that disciplines our perspectives, so views really are rankable and relativism doesn’t follow. The next two foundations say what those better-and-worse perspectives are made of, and what their being made does and doesn’t commit us to.

Pillar 2 — Constructivism

The claim

Perspectival realism says our access to the world is situated. Constructivism says that what we build with that access — our values and our oughts in particular — is made, not found. Stated carefully: normative truths are constituted by what agents construct and converge on as their context widens; they aren’t mind-independent facts lying around waiting to be discovered. There’s no Platonic catalog of moral facts, no value woven into the fabric of spacetime, no “ought” that would still hold in a universe with no valuers in it. And yet — this is the whole job of the foundation — what gets constructed is not, for all that, arbitrary.

It helps to be exact about the target, because “constructivism” has been stretched across two different rooms. In the philosophy of science it names the claim that scientific facts are, to some degree, made by the practices, paradigms, and social dynamics of inquiring communities — Kuhn’s paradigms setting what even counts as a problem, the sociology-of-knowledge tradition (Bloor, Barnes) insisting that belief has to be explained socially, Peschl’s cognitive constructivism treating cognition as the building of representations selected for “functional fitness.” That cousin is real, and the book is friendly to it — but only so far. It grants the descriptive part, that beliefs have social causes worth explaining; it turns down the equivalence postulate that tradition rests on — the claim that all beliefs stand on a par with one another when it comes to what makes them credible. The counter-dynamic denies exactly that: a system that buys its coherence by narrowing what it’s willing to let in is worse — and the whole argument of this book is that you can tell the difference. But the foundation the book actually leans on is metaethical constructivism: the claim, specifically about value, that normative facts are constituted by the standpoints and procedures of valuing agents rather than read off some independent moral reality. The science version is the knowing-cousin; the metaethical version does the work here.

The construction procedure

The make-or-break question for any constructivism is: constructed how? A constructivism that can’t name its procedure really is relativism with better manners, because “we make it up” and “we make it up by this particular disciplined process” are different claims, and only the second one survives the relativism charge. So here’s the procedure the book commits to. Value is constructed by three operations working together:

Meaning-making. An agent constitutes what matters to it — not by decree, but as the standing significance its drives, its history, and its situation confer on the world. (This is the book’s deliberate split between sense-making, which makes the world intelligible, and meaning-making, which makes it significant; the second is where value is born.)
Selection for viability. Constructed values aren’t all equal, because not all of them can be lived. Values that can’t sustain the agent, or the “we,” that holds them get weeded out by the same indifferent feedback that prunes bad maps. Construction proposes; viability disposes.
Convergence under a widening context. As the circle of concern widens — more agents, longer horizons, more of the world pulled inside the frame — values that were only coherent in a narrow setting come under pressure to either re-cohere at the larger scale or be dropped. What survives the widening isn’t any one agent’s invention; it’s the structure that many separate constructions converge toward.

These three together are why made isn’t arbitrary. An arbitrary construction is one that could just as easily have gone any other way and answers to nothing. This construction answers to three things — to what can actually be lived, to a shared world that limits what can be lived, and to the convergence that widening forces — and the constructing agent gets to choose none of them. The output is built, and it’s disciplined; both are true, and the second is what keeps “built” from meaning “anything goes.”

“You’ve changed the subject”

The sharpest objection a moral realist throws at any constructivism isn’t that it’s false but that it’s an evasion. You promised an account of real normativity, the realist says — the genuine, binding, non-optional ought — and what you’ve handed me is a sociology story about what valuers happen to agree on. You changed the subject from morality to mere preference and then declared victory. This is the metaethical version of the complaint, and it deserves a straight answer, not a dodge.

The straight answer owns the constitutive account and refuses the inferential one. The book does not claim to derive an “ought” from an “is” — Hume’s gap is real, and trying to infer an ought straight out of an is really is a fallacy. What the book claims is that normativity isn’t inferred from the natural facts but constituted by one particular natural structure: the convergence of constructed values under a widening context. “Ought” doesn’t name a spooky non-natural property, and it doesn’t name a disguised preference; it names your position relative to that convergence — the direction in which coherence-over-a-widening-context lies. So the constructivist hasn’t swapped “real ought” for “mere preference.” The constructivist has said what the real ought is — and put it in something that genuinely binds, because an agent that defies the direction of convergence isn’t committing a faux pas, it’s undermining the very coherence that lets it go on being an agent at all. Whether that fully satisfies the realist is a fair question; but it’s a position, honestly constitutive, not a change of subject.

Allies, and a boundary to mark

Two contemporary constructivists are worth naming — both because they lend support and because the differences pin down the book’s own commitments.

Sharon Street gives the strongest argument for this whole neighborhood of views: the evolutionary debunking argument. Our evaluative tendencies are soaked through by natural selection, which shaped them for reproductive fitness, not for tracking any independent moral truth. If mind-independent moral facts existed, there’s no reason evolution would have aimed us at them — so the realist is stuck positing either an unexplained coincidence or a truth-tracking faculty nobody can describe. Street takes this to defend anti-realism: better to hold that evaluative truth is constituted from inside the evaluative standpoint than to keep faith with facts we couldn’t possibly know. The book leans on this argument openly — it’s the strongest independent footing the constructivist foundation has.

Christine Korsgaard gives the other major version, a Kantian constructivism on which value is built from the standpoint of rational agency: in valuing anything at all, an agent can’t help conferring value on its own rational nature, and normativity gets built up out of that unavoidable self-constitution. Her work shows constructivism can be rigorous and binding rather than loose — but she’s also where the framework has to mark a boundary. Korsgaard, a constructivist, nonetheless grounds the moral standing of animals in the animal’s own good — a patient-centered move. That’s a warning against an easy inference the book does not get to make: constructivism by itself does not entail the book’s agent-relative standing, on which standing attaches to agents (the constructors of value) rather than to patients (the bearers of welfare). A constructivist can perfectly well land where Korsgaard lands. So the book’s agent-relative package is a distinctive constructivism, to be defended as a deliberate choice — not advertised as a free gift that comes with being a constructivist at all.

What this pillar gives. With constructivism in place, the framework can relocate “ought” without committing the naturalistic fallacy, and deny mind-independent moral facts without sliding into nihilism. Values are made — which is exactly why they can be made better — and the making is disciplined, which is why “made” doesn’t license “anything goes.” What constructivism doesn’t yet say is what these made things are — what kind of entity a value, a method, an agent even is, such that one account can run across humans, communities, and machines. That’s the third foundation.

Pillar 3 — Functionalism

The claim

Functionalism answers the question what kind of thing is that? — and its answer is always the same: a thing is what it does. To say what a heart is, you don’t start with the muscle tissue; you start with the pumping, and then ask what’s doing it. To say what a value is, on this view, you don’t start with the neurons or the lines of code; you start with the role it plays — the way it disposes an agent to weigh, to choose, to act — and you stay indifferent, at the level of definition, to whatever happens to be playing that role. Stated for the book’s purposes: the morally relevant entities — agents, values, methods, “selves” — are functional kinds, picked out by role rather than by substrate, and therefore able to be realized in more than one material.

The book’s own compression of this is the line wisdom is seeing the edges: to understand a thing well is to perceive what it affords and what it does — what it makes possible, where its competence stops — rather than to take an inventory of its material. That’s functionalism worn as everyday perception instead of stated as a thesis, and it’s the same idea.

One distinction has to be drawn right away, because the position keeps getting confused with a cruder neighbor. Functionalism is not operationalism. Operationalism identifies a thing with a fixed measurement procedure — temperature is what the thermometer reads. Functionalism identifies a thing with a role in a system of causes and effects, a role that can be filled in many ways and is understood by its place in the whole, not by any single operation. The book’s functionalism is the second kind: a value or an agent is defined by its functional role inside a context of meaning and a scope of effectiveness — by what it does and what it answers to — not by any one way of detecting or building it. The difference matters because it’s exactly what makes the kinds realizable in more than one material, and that multiple realizability is the hinge the book’s largest claims turn on.

The scholarship it leans on

Functionalism is one of the best-developed positions in twentieth-century philosophy, which is a help: the framework is drawing on well-tested ideas, not improvising. In the philosophy of mind, Hilary Putnam and David Lewis set the core: a mental state like pain is constituted by its causal role — caused by damage, causing distress and avoidance — and not by any particular physical stuff, from which it follows that the very same state could be realized in a brain, in a different brain, or in principle in a machine. That consequence, multiple realizability, is the one the book needs, and it’s worth being clear that it’s a consequence of the position, not a wish bolted onto it.

Closer to the book’s subject is moral functionalism, the program of Frank Jackson and Philip Pettit, which gives moral terms the same Lewisian treatment: a moral concept is defined by its place in a network of “platitudes” — the web of everyday truisms about how rightness, goodness, fairness, and harm hang together and connect to action. To be right just is to occupy the node the platitudes reserve for rightness. This is the most direct philosophical ancestor of the claim that moral entities are functional kinds. The empirical companion, over on the agency side, is the growing body of work on substrate-independent agency and goal-directedness across biological scales — multiple realizability observed rather than just argued for.

The bridge to extensibility

Here’s what justifies the whole foundation. If agency and value are functional kinds, defined by role and realizable in more than one material, then the framework isn’t parochially about human morality. It’s about any system that instantiates the roles — that constructs values from a situated perspective and acts to widen their coherence. A human being instantiates those roles. So, the book argues, does a family, a firm, a polity — a “we” that has woken up into an agent in its own right. And so, increasingly, can an artificial system. Multiple realizability is the engine of extensibility: the reason the same arrow can be traced through a person, a community, and a machine is that morality, on this account, was never a fact about the human substrate; it was a fact about a role, and roles travel. Take this foundation away and the reach collapses back to the human case; keep it and the reach isn’t a flourish, it’s a straightforward entailment.

The threats, and the answers

Functionalism carries two well-known liabilities, one imported from the philosophy of mind and one native to metaethics. Both have to be met, not waved at.

The first is the qualia worry: the absent-or-inverted-spectrum challenge, which says you can specify every functional role and still leave out what it is like — that two systems could be functionally identical while one has inner experience and the other is dark inside. For a theory of mind, this is a serious and unsettled problem. The framework’s luck is that it doesn’t have to solve it, because of where it puts moral standing. Standing, here, attaches to agency — to the constructing of value and the answering-for it — not to the presence of phenomenal experience. The question here isn’t “is there something it is like to be this system?” but “does this system construct values from a perspective and act to widen their coherence?” That’s a functional question with a functional answer. So the qualia problem, real as it is elsewhere, doesn’t leak into the book’s ethics: an account of whose experience matters isn’t a prerequisite for an account of who has standing, because standing has been routed through agency rather than through felt experience. And that routing doesn’t leave the patient out in the cold: a suffering animal, or a profoundly impaired human, isn’t standing-less but holds standing relationally — its welfare matters as it’s valued within some agent’s widening context, and the whole tendency of the arrow is to widen that circle to take in more such beings. What the account denies is only intrinsic, agent-independent standing; what it keeps — and grows — is standing conferred as care widens. And it denies that of every entity — the value-constructing agent included. An agent’s standing to itself isn’t a gift from the cosmos; it’s self-conferred, in the act of keeping itself going, and it’s every bit as relational as the standing it extends to anything else. Intrinsic, agent-independent standing isn’t a higher grade the framework withholds from animals; it’s the view from nowhere wearing ethical clothes, and the first pillar already turned it away. So nothing here ranks a value-constructing machine above a suffering animal: there’s one kind of standing, conferred and graded, and a felt inner life is weight a widening agent takes in, not a higher rank of worth. (This is also where the book parts ways with welfare-first views, and the parting is a principled choice — though it does accept two deliberate costs: standing is conferred rather than intrinsic, and a genuinely value-constructing agent could hold it without being sentient. Both are met head-on in the essay on suffering.)

The second is the Canberra-plan critique, aimed squarely at moral functionalism: Jackson and Pettit’s platitudes are supposed to be roughly a priori and widely shared — the common moral knowledge that fixes what moral terms refer to — and the objection is that there are no such platitudes, that moral “common sense” is neither a priori nor agreed on but historically variable and contested. Against orthodox moral functionalism, the objection has teeth. Against the book’s version it does something more interesting: it turns into a feature. The book never claimed the platitudes were fixed a priori or already shared. Just the opposite — the platitudes that fix what “right” and “good” pick out are precisely the evolving, convergent output of constructed perspectives under a widening context. That they aren’t static and aren’t yet universal isn’t an embarrassment to explain away; it’s the constructivist and perspectival picture restated from the functionalist’s side. The roles are real and the platitudes are real, but they’re being written, by convergence, rather than read off some a priori tablet. So the objection that sinks the orthodox program gets absorbed by the book’s version: the moving target is the thing the book was describing all along.

What this pillar gives. Functionalism gives the framework substrate independence, and substrate independence gives it reach: one account, lawfully and not loosely, across persons, collectives, and artificial agents. It also sets a clean division of labor among the three — perspectival realism saying our grip on the roles is situated, constructivism saying the value-roles are made and disciplined, functionalism saying what kind of thing is thereby made and why it can be made of more than one material. Which raises the question the next section has to answer: do these three lean on one another so completely that they form a closed circle — each one propped up only by the others — or do they stand independently enough to actually bear weight?

How the three lock together: a tripod, not a circle

The three foundations are really three faces of one stance. Agents construct (constructivism), from a situated vantage point that still tracks reality (perspectival realism), functional models of value and method picked out by what they do (functionalism). Most compactly: knowledge and value are made, from a perspective, by what works. Each foundation, looked at closely, hands you the other two. Perspectival realism’s claim that perspectives are built tools is already half of constructivism; constructivism’s insistence that constructions are kept honest by what can be lived is already functionalism’s “judged by what it does”; functionalism’s roles have to be grasped from somewhere, which is perspectival realism again. The mutual entailment is real, and it’s where the synthesis gets its strength.

It’s also, if you’re not careful, where a fatal weakness could hide — worth naming before a critic does. Mutual support can curdle into a closed circle: perspectival realism propped up only by functionalism, propped up only by constructivism, propped back onto perspectival realism, the whole structure hovering with nothing underneath it. A position that supports only itself supports nothing.

The defense is to show that each foundation has independent footing — a motivation that doesn’t run through the other two, a different patch of floor under each leg:

Perspectival realism stands on its own in the philosophy of science. The situated-knowledge debates, the long argument over the “view from nowhere,” the pressures that make a flat-footed scientific realism hard to hold — none of these depend on anything the book says about value or function. Massimi’s case is made inside epistemology.
Functionalism stands on its own in the philosophy of mind. Multiple realizability is argued from the mind–body problem and the special sciences (Putnam, Lewis, Fodor), with no premise about morality or perspective required.
Constructivism stands on its own on the back of the evolutionary debunking argument and the sheer implausibility of mind-independent value. Street’s case against moral realism is built out of facts about natural selection, not out of the other two foundations.

Because each leg touches a different floor — philosophy of science, philosophy of mind, the metaethics of evolved valuers — the structure is a tripod: mutually reinforcing and independently footed. The mutual reinforcement becomes a virtue instead of a circularity, because the support is over-determined: knock out the internal argument for any one leg and the other two still hold the position up while it’s repaired. That’s the difference between three sticks lashed into a tripod and three drunks holding each other upright.

The stance is convergent, not idiosyncratic

By now it would be reasonable to suspect that “made, from a perspective, by what works” is a private contraption — three respectable foundations wired together in a way only this book attempts. The opposite is true, and the fact is worth lingering on, because it’s evidence of a particular kind. This integrated stance has been reached independently, in different vocabularies, by several rigorous traditions that weren’t talking to one another.

Pragmatism, especially Dewey. Inquiry actively constructs knowledge; ideas are judged instrumentally, by what they do; the knower is situated, embedded, transacting with an environment rather than mirroring it. Dewey’s transactional, ends-in-view epistemology is the deepest ancestor of the book’s stance. (Relatives: William James’s “cash value” of an idea; Peirce’s “final opinion” toward which inquiry converges — a convergence engine that quietly prefigures the book’s tree of agreement.)
Enactivism and embodied cognition — Varela, Thompson, and Rosch’s The Embodied Mind, and Di Paolo’s later work. The closest match of all: cognition is the enaction, the bringing-forth, of a world by an embodied agent (construction) through sensorimotor coupling and viability (function), from its own situated body (perspective). Their term for it is, literally, sense-making. A boundary has to be marked here: the strong, radical wing of enactivism is anti-representational — it denies that cognition traffics in internal models — whereas the book is openly model-building. So the book sits on the predictive-processing side of that family’s quarrel, and should say so rather than claim the whole family.
Radical constructivism — Ernst von Glasersfeld. Knowledge as construction judged by viability — fit, not match, usefulness rather than correspondence (functionalism in its purest form) — and explicitly observer-relative (perspective). Very nearly the book’s exact trio, laid out already in the 1970s and 80s, with cybernetic relatives in Maturana and Varela’s autopoiesis and structural coupling, and in von Foerster’s wry second-order maxim that “objectivity is the delusion that observations could be made without an observer.”
Predictive processing and active inference — Clark’s Surfing Uncertainty, Friston’s free-energy work. The agent builds a generative model (construction), acts to make the world match it and minimize surprise (function), from a boundaried vantage point — the Markov blanket — that is the formal image of a perspective. The mathematical and neuroscientific expression of the same stance.

Notice what this convergence is, by the book’s own lights. When windows opened from very different rooms — phenomenology, pragmatism, cybernetics, neuroscience — look out and report the same structure, that agreement is, by the book’s own criterion, the mark of the structure being real rather than an artifact of any one vantage point. It’s the tree of agreement drawn between disciplines instead of between people, and it should be read the same way: independent convergence is evidence. This sets the book’s posture. The right claim isn’t “here is a new epistemology.” The right claim is: here is the convergent epistemology of pragmatism, enactivism, and radical constructivism — stated plainly, given its explicit tripod, and carried, for the first time, all the way into a moral framework.

What is actually new here

Naming so many distinguished ancestors raises a fair question: if the pragmatists and enactivists and cyberneticians and predictive-processing theorists all got there first, what’s left for the framework to have done? Two things are its own.

The first is the explicit tripod. Most of the relatives imply the integration — you can reconstruct all three commitments from Dewey or von Glasersfeld — but few of them set the three out as named, independently-footed supports that each deliver the other two, and fewer still stop to disarm the circularity the integration invites. Making the structure explicit, and showing it’s a tripod and not a circle, is a real if modest contribution.

The second matters more: the extension from cognition and science to value and morality. The convergent epistemology was built to explain knowing — how minds and sciences get a grip on the world. The framework routes that same machinery into value: into the criterion of coherence over a widening context, the relocation of “ought” from discovered fact to constituted convergence, agent-relative standing, and the extensibility of the whole framework across substrates. That’s the novelty that carries weight. The epistemology is inherited ground, the work of those who cleared it; the moral extension is what the framework builds on it. Keeping the two straight — inherited ground, built structure — is what lets the book say exactly what it has done, and no more.

The one objection, answered

Everything in this essay has pointed at a single charge, the one all three foundations invite together. Each leans away from fixed, mind-independent facts: perspectival realism denies the view from nowhere, constructivism denies discovered values, functionalism denies that the morally real has any fixed substrate. Stack the three together and the reader is right to press the obvious worry — that this is relativism dressed for a seminar, “anything goes” with footnotes. If it can’t be answered here, then the confidence the book shows everywhere else has no ground under it.

The answer is one sentence with four supports, worth assembling in full because the rest of the book keeps referring back to it. Situated, constructed, functional models of value are not arbitrary, because they’re disciplined — four times over:

by a shared, mind-independent reality, which every perspective answers to and which corrects the perspectives that defy it (perspectival realism);
by selection for viability — values and methods that can’t be lived get pruned by the indifferent feedback of what actually works (functionalism);
by convergence under a widening context, which forces narrow coherences either to re-cohere at a larger scope or to fail, drawing independent constructions toward a shared root (the tree);
and by the counter-dynamic, which marks as moral regress any coherence bought by shrinking the circle of concern — so the easiest consistency, caring about less, gets named for the failure it is.

It’s worth being exact about one word, because it’s where the framework gets misheard most often. Widening the context means letting more into consideration — more perspectives, more of reality, more of the parties an act touches — not growing in size, reach, or power. A regime that expands by crushing dissent, or a creed that spreads by hardening against doubt, is narrowing even as it grows: it only holds together by refusing what it will let in. So a stable tyranny or a viable hive-mind isn’t a counterexample to the arrow — it’s the arrow’s photographic negative, coherence achieved by sealing off the very widening that would make it moral. And viability renders no verdict on its own: it prunes what can’t persist, but it doesn’t crown what does. What survives by contraction has met the counter-dynamic, not escaped it.

A construction answerable to all four is made, and it’s disciplined; those two facts together are the whole of the book’s epistemic and moral stance. Made is not arbitrary. That the good is constructed doesn’t make it optional, any more than the fact that bridges are built makes them safe to cross no matter how they were built. Some are built well — answerable to the load, the river, the materials, the crossing — and some fall. This book is, in the end, an account of the difference; and these three foundations are what make the difference real rather than a matter of taste.

Sources & further reading

This essay engages its literature directly rather than through the book’s per-chapter end notes. The works below are the central ones, grouped by foundation; fuller working notes live in the project’s vault.

Perspectival realism. Michela Massimi, Perspectival Realism (Oxford University Press, 2022) — realism about phenomena, the plurality of situated perspectives, models as inferential blueprints. Ronald Giere, Scientific Perspectivism (2006) — models as maps, accuracy-and-usefulness over truth-or-falsity. Paul Teller, on perspectival representation, “semantic alter egos,” and the Complex World Constraint. Older kin: Friedrich Nietzsche’s perspectivism; Jakob von Uexküll on the Umwelt.

Constructivism (metaethical). Sharon Street, “A Darwinian Dilemma for Realist Theories of Value” (Philosophical Studies, 2006) — the evolutionary debunking argument as a defense of anti-realist constructivism. Christine Korsgaard, Self-Constitution (2009) and Fellow Creatures (2018) — Kantian constructivism, and the patient-centered grounding of animal standing from which this book deliberately departs. Ernst von Glasersfeld, Radical Constructivism (1995) — knowledge as construction judged by viability (fit, not match). Cousins in the philosophy of science: Thomas Kuhn on paradigms; the sociology of scientific knowledge (David Bloor, Knowledge and Social Imagery, 1976; Barry Barnes) — a cousin whose equivalence postulate this book declines.

Functionalism. Hilary Putnam and David Lewis on functional roles and multiple realizability (see the SEP entry on Multiple Realizability); Jerry Fodor on the special sciences. Frank Jackson & Philip Pettit, “Moral Functionalism” — moral terms defined by their place in a network of platitudes, the most direct ancestor of this essay’s third foundation. On substrate-independent agency, the contemporary work on goal-directedness across biological scales.

The convergent stance. John Dewey’s transactional, ends-in-view pragmatism (with William James and C. S. Peirce in the background); Francisco Varela, Evan Thompson & Eleanor Rosch, The Embodied Mind (1991), and the enactivist tradition’s notion of sense-making; Andy Clark, Surfing Uncertainty (2016) and Karl Friston’s free-energy / active-inference program; Humberto Maturana & Francisco Varela on autopoiesis and structural coupling; Heinz von Foerster’s second-order cybernetics.