The First Blade: Me and World

Working notes, not prose. This page is a research packet for drafting the chapter: the brief, source material, questions, examples, reader perspectives, and the earlier draft.

Brief

Must: Draw the first cut: an organism as a system within the outer system of the universe. Show that the environment always acts on us, so we are never a system in complete isolation, even though it is usually easier and useful to treat ourselves as one.
Serves: It carries Chapter 4’s “know thyself” into a systems view of the self, the lens every later cut depends on.

Quote options

“The theme of this book is that a universe comes into being when a space is severed or taken apart. The skin of a living organism cuts off an outside from an inside.” — G. Spencer-Brown, Laws of Form (1969), prefatory note. [verified: https://www.walden3d.com/w3d_old/papers/lynk_part1_90/tsld026.htm] (that transcription has the typo “served”; “severed” confirmed by multiple citing sources) Why: Names the first cut exactly as the chapter draws it: the skin as the original distinction between organism and world.
“When we try to pick out anything by itself, we find it hitched to everything else in the universe.” — John Muir, My First Summer in the Sierra (1911), journal entry for July 27. [verified: https://www.gutenberg.org/cache/epub/32540/pg32540.txt] Why: Says the other half of the chapter: we can cut ourselves out, but nothing is ever a system in complete isolation. (This is the authentic wording; the popular “tug on anything” version is a paraphrase.)
“An ant, viewed as a behaving system, is quite simple. The apparent complexity of its behavior over time is largely a reflection of the complexity of the environment in which it finds itself.” — Herbert A. Simon, The Sciences of the Artificial (1969; 3rd ed. 1996). [verified: https://monoskop.org/images/9/9c/Simon_Herbert_A_The_Sciences_of_the_Artificial_3rd_ed.pdf] Why: Shows why the system/environment split is useful. Much of what looks like the organism is really the world acting on it.
“What an organism feeds upon is negative entropy. Or, to put it less paradoxically, the essential thing in metabolism is that the organism succeeds in freeing itself from all the entropy it cannot help producing while alive.” — Erwin Schrödinger, What Is Life? (1944), ch. 6. [verified: http://www.df.uba.ar/users/giribet/f4/life.htm] Why: The physical reason an organism can’t be a closed system: it stays itself only by constant exchange with the outer system. (Schrödinger later noted that “free energy” is the more accurate term.)
“The mental world—the mind—the world of information processing—is not limited by the skin.” — Gregory Bateson, “Form, Substance and Difference,” in Steps to an Ecology of Mind (1972), p. 460. [verified: https://canadiancor.com/form-substance-difference/] Why: A counterweight that keeps the boundary honest. The skin is a useful edge, not where the self actually ends. It also leads into Chapter 6.

Research

Core argument

Pick up from Chapter 4. “Know thyself” assumes there is a self to know, which means something has to be marked off from everything else first. The first blade is that mark: a line between me (the system) and world (its environment). It comes before any thought about the line. The earlier draft’s opening scene of waking in the dark and finding the floor shows this well.
Define a system simply. A system is a set of parts whose relations to each other are tighter or more consequential than their relations to what lies outside. The boundary is wherever the pattern of interaction changes density. An organism is a system that keeps redrawing its own boundary, which is roughly the autopoiesis idea (Maturana & Varela). A stone doesn’t do this. A cell does.
Why the cut is worth making. Treating yourself as a unit lets you track what needs preserving (temperature, blood sugar, promises) against what has to be dealt with (weather, predators, other people). Claude Bernard’s milieu intérieur is the classic statement: a steady inside is what buys freedom in a changing outside. Simon’s ant makes the same point from the other side, since much of the apparent complexity of behavior belongs to the terrain.
The line is never sealed. Thermodynamics requires an organism to be an open system. Schrödinger’s point is already in the quote options. Food, air, heat, light, microbes, sound and information cross the line all the time. Take away the crossings and the organism dies (suffocation, starvation) or comes apart (sensory deprivation, loss of circadian time).
The line is also not where we assume it is. Microbiome numbers (about 38 trillion bacteria against about 30 trillion human cells), mitochondria that descend from free-living bacteria, the immune system tracking danger rather than foreignness (Matzinger), tools absorbed into the body schema (the blind man’s cane, Iriki’s macaques), and notebooks that act as memory (Clark & Chalmers) all show the edge is porous and movable, and that it depends on the task.
Boundaries are nested and scale-relative. Organelle in cell, cell in organ, organ in body, body in family, family in town, town in biosphere. Each level is a system to the level below it and an environment to the level above. The Markov-blanket literature makes this formal (“blankets of blankets”). Stop before claiming that framework proves anything. It is one formalism among several.
The world acts on us, and we act back. Lewontin says organisms construct their environments, and niche construction says those environments then select the organism. The line runs both ways, so “me vs. world” is really “me with world, as seen from here.”
The useful fiction. It is nearly always easier to model yourself as an isolated agent with an inside and an outside. Physicists treat a gas in a box as isolated in the same way. The fiction becomes dangerous when we forget it is one: when we credit or blame individuals for what the environment did, or ignore how dependent we are (air, water, other people, a stable climate).
Close with the lens. Each later cut (reality/representation, good/bad, the category pairs of Chapter 8) is drawn from this first edge. Hand the reader a portable question: where am I drawing my edge right now, what is crossing it, and what have I stopped seeing because I drew it?

Key questions

Where do I end? At the skin, at the tip of the cane I’m holding, at the phone that stores my memories? (child: “Is my spit still me after I spit it out?”)
If most of the atoms in my body get replaced over a few years, what exactly is the “me” the boundary protects: the stuff, or the pattern?
Are the bacteria in my gut me or not me? If they change my mood and digestion, why should skin decide?
What separates a system that has a boundary (a cell) from one we put a boundary around (a cloud, a nation, a wave)?
Can anything be a truly isolated system? Is the universe as a whole the only one?
If nothing living can be isolated, why does thinking of ourselves as isolated work so well so often?
When does the “self-contained individual” model start giving wrong answers? In medicine, in blame and credit, in economics?
Does a tick live in the same world I do? If each creature’s world is cut out by its senses, is there one “world” on the other side of the blade, or many?
What happens to a person when the environment stops acting on them (darkness, silence, no clocks, no people)? Do they become more themselves or less?
Is my mind inside my head? What changes if a notebook or a phone counts as part of it? (cynic: “Isn’t ‘extended mind’ just a fancy way of saying I use tools?”)
Does the immune system know what “self” is, or does it only react to trouble? What does that say about how any organism draws its line?
Can a group be a system with its own inside and outside, the way a beehive or a company can? When does a boundary around a group become a real one?
If the environment shapes the organism and the organism shapes the environment, which is cause and which is effect?
(child) “If I’m made of food, am I the food?” When does something that crosses the line become part of the inside?
(cynic) “Isn’t ‘everything is connected’ just a slogan? If everything is connected, nothing is explained.” How do we keep boundaries and connections without mush?
Who benefits when someone insists you are a self-made, self-contained individual? Who benefits when someone insists you are nothing but your environment?
Is there a right size for a self? Can a boundary be drawn too tight (isolation, paranoia) or too loose (losing yourself in a group, a partner, a cause)?
Is the first blade something we discover (like a cell membrane) or something we draw (like a property line), or both?

Examples

The cell membrane (cells). A lipid bilayer only about 5–10 nm thick separates each cell from its surroundings. It is a filter, not a wall: channels, pumps and receptors decide what passes. A cell that stops pumping ions is dead within minutes. This is the literal first blade, and it is actively maintained. (Standard cell biology; any textbook, e.g. Alberts, Molecular Biology of the Cell.)
Mitochondria (cells, deep time). The powerhouses in every one of your cells descend from bacteria that were once free-living and were absorbed by another cell. Lynn Margulis argued this in “On the Origin of Mitosing Cells” (1967, J. Theoretical Biology; in references.json). Some of what is most “inside” you was once outside.
The microbiome count (bodies). Sender, Fuchs & Milo (2016) put the typical adult at about 30 trillion human cells and about 38 trillion bacteria. That overturned the old 10:1 myth. They also note each defecation removes a quarter to a third of the colonic bacteria, so the ratio changes during the day. https://pmc.ncbi.nlm.nih.gov/articles/PMC4991899/
Uexküll’s tick (animals). The tick waits on a branch and responds to only three signals: butyric acid (the smell of mammal skin), warmth, and hair texture. Uexküll reports that a tick was kept alive, without feeding, for 18 years in the Rostock zoological institute. The world outside is vast. The world for the tick has three features. (Uexküll, A Foray, 1934; O’Neil trans. 2010. Check the 18-year figure in the edition.)
Claude Bernard’s internal environment (physiology, 1850s–1870s). Bernard saw that blood and tissue fluid form an “inner sea” held steady (temperature, salt, sugar) while the outer world swings. Walter Cannon named the process homeostasis in 1926–1932. Warm-blooded animals can hunt at night and in winter because their inside doesn’t follow the outside. https://pmc.ncbi.nlm.nih.gov/articles/PMC9139283/
Biosphere 2 (sealed human system, 1991–93). Eight people were sealed in a 3.14-acre glass complex in Arizona on 26 September 1991 for two years. Oxygen fell from 20.9% to 14.5% over 16 months, equivalent to about 4,080 m altitude, and crew showed fatigue and sleep apnea. Oxygen was injected in January and August 1993. The culprit was the building itself: CO2 from soil microbes reacted with exposed concrete. The most deliberate attempt at a closed human world still leaked (under 10% a year) and was undone by a part of the “environment” nobody counted. https://en.wikipedia.org/wiki/Biosphere_2
Michel Siffre in the cave (a person, cut off from time). In July 1962 Siffre spent about two months in the Scarasson abyss, 130 m underground, with no clocks or daylight. His sense of elapsed time drifted badly. In 1972 he spent six months in Midnight Cave, Texas, and at times fell into roughly 48-hour sleep-wake cycles. Take away the sun’s action on us and our inner clock stops being set to the planet. https://en.wikipedia.org/wiki/Michel_Siffre
McGill sensory-deprivation studies (people, 1951–54). Student volunteers under Donald Hebb (Bexton, Heron & Scott, 1954) lay in cubicles with goggles, gloves and cardboard cuffs, paid about $20 a day. Most quit within 2–3 days, and many reported hallucinations and impaired thinking. The mind needs the world acting on it to stay itself. [Specifics UNVERIFIED this session: check Bexton, Heron & Scott, Canadian Journal of Psychology 8(2), 1954, and Heron, “The Pathology of Boredom,” Scientific American, Jan 1957.]
The rubber hand illusion (body boundary moves in minutes). Botvinick & Cohen, Nature 391 (1998): a hidden real hand and a visible rubber hand are stroked in sync, and after a few minutes many people feel the rubber hand as their own. Threaten it and they flinch and sweat. The felt edge of the self is a live inference, not a fixed fact. https://en.wikipedia.org/wiki/Body_transfer_illusion
Iriki’s rake-using macaques (animals and tools). Iriki, Tanaka & Iwamura (1996, NeuroReport 7:2325–30) trained macaques to retrieve food with a rake. The visual receptive fields of “hand” neurons stretched to cover the rake, but only when the monkey was actively using it, not merely holding it. The neural boundary of the body extended to the tool. Pair with the Bateson and Merleau-Ponty cane passages below.
Otto’s notebook (a mind reaching out). Clark & Chalmers (1998): Otto has Alzheimer’s and relies on a notebook the way Inga relies on biological memory. If the notebook plays the same role, is it part of Otto’s mind? A modern version is the reader’s phone. https://www.alice.id.tue.nl/references/clark-chalmers-1998.pdf
Pregnancy and the immune “self” (bodies inside bodies). A fetus carries the father’s proteins, yet the mother usually doesn’t reject it. Matzinger uses this, along with puberty, lactation and tumors, to argue that the immune system reacts to damage, not to foreignness. Where the line falls is decided by context. https://people.scs.carleton.ca/~soma/biosec/readings/matzinger-science.pdf
Beavers and earthworms (niche construction). Beavers build dams that turn streams into ponds, which then select for beaver traits. Darwin’s last book (1881) was about earthworms turning over soil across centuries. The organism doesn’t just sit in its environment. It is partly the environment’s author (Odling-Smee, Laland & Feldman, Niche Construction, 2003; Lewontin).
The Year Without a Summer (civilizations). Mount Tambora erupted on 10 April 1815. The global average fell 0.4–0.7 °C, it snowed in New England in June 1816, crops failed across Europe, there were food riots, and typhus killed over 65,000 people in 1816–19. A volcano in present-day Indonesia reached into European kitchens. It also kept Mary Shelley indoors at Villa Diodati, where Frankenstein began. However self-contained a civilization feels, it sits inside a larger system. https://en.wikipedia.org/wiki/Year_Without_a_Summer
Thought experiment: the perfectly isolated box. Physics separates isolated systems (no exchange of energy or matter), closed (energy only) and open (both). Ask the reader to name one truly isolated system. Even a sealed thermos loses heat, and even deep-space probes are pushed by sunlight and gravity. The only candidate may be the universe as a whole, and that’s a claim, not an observation. Every living thing is on the open end of the spectrum.
Atoms replaced (the ship of Theseus in your body). Paul Aebersold’s radioisotope work (Smithsonian Annual Report, 1953) is often cited as showing that about 98% of the body’s atoms are replaced within a year. Spalding et al. (Cell 122, 2005) used Cold War carbon-14 to date human cells and found very different turnover by tissue: gut lining is replaced within days, while much of the neocortex is as old as you are. [UNVERIFIED this session: verify both figures before use; the 98% claim is popular and loosely sourced.]

Source material

“Consider a blind man with a stick. Where does the blind man’s self begin? At the tip of the stick? At the handle of the stick? Or at some point halfway up the stick? These questions are nonsense, because the stick is a pathway along which differences are transmitted under transformation”
- Gregory Bateson, Steps to an Ecology of Mind (1972). The passage appears in “The Cybernetics of ‘Self’: A Theory of Alcoholism” (1971) and is echoed in “Form, Substance and Difference” (1970). Confirm which essay and the page in your edition. [verified: https://www.thenewatlantis.com/text-patterns/the-blind-mans-stick]
- Use: The chapter’s central thought experiment. The cut is real but misplaced if drawn across a live pathway. (Distinct from the Bateson “not limited by the skin” line already in Quote options.)
“The blind man’s cane has ceased to be an object for him, it is no longer perceived for itself; rather, the cane’s furthest point is transformed into a sensitive zone, it increases the scope and the radius of the act of touching and has become analogous to a gaze”
- Maurice Merleau-Ponty, Phenomenology of Perception (1945), trans. Donald A. Landes (Routledge, 2012), p. 144 (the wording matches Landes; the source blog lists “2002”, so confirm the edition. Colin Smith’s 1962 translation reads “stick”). [verified: https://www.jhiblog.org/2023/09/08/the-vulgar-expression-of-being-sartre-merleau-ponty-and-other-abled-bodies/]
- Use: The first-person counterpart to Bateson: from the inside, the self-world edge moves to the tip of the tool. Note the disability-studies critique (Reynolds 2018) that this is a sighted person’s imagination of blindness.
“the whole rich world surrounding the tick is constricted and transformed into an impoverished structure that, most importantly of all, consists only of three features and three effect marks – the tick’s environment”
- Jakob von Uexküll, A Foray into the Worlds of Animals and Humans (1934), trans. Joseph D. O’Neil (U. Minnesota Press, 2010), p. 51. [verified: https://www.tetralogiques.fr/spip.php?article183=] (source has the typo “an three”; German original “aus 3 Merkmalen und 3 Wirkmalen”)
- Use: Shows that the “world” side of the blade is itself cut to the organism’s size. It hands off to Chapter 6.
“The fixity of the internal environment is the condition of free and independent life”
- Claude Bernard, Leçons sur les phénomènes de la vie communs aux animaux et aux végétaux (1878), as quoted in “Claude Bernard, the Founder of Modern Medicine,” Cells 11 (2022), PMC9139283. French: “La fixité du milieu intérieur est la condition de la vie libre, indépendante.” [verified: https://pmc.ncbi.nlm.nih.gov/articles/PMC9139283/]
- Use: The strongest case for the boundary. Keeping an inside steady is what lets an organism be free of the outside’s moods.
“An autopoietic machine is a machine organized (defined as a unity) as a network of processes of production (transformation and destruction) of components which: (i) through their interactions and transformations continuously regenerate and realize the network of processes (relations) that produced them”
- Humberto Maturana & Francisco Varela, Autopoiesis and Cognition: The Realization of the Living (Reidel, 1980), p. 78. [verified: https://en.wikipedia.org/wiki/Autopoiesis] (verify against the book if possible; Wikipedia cites p. 78)
- Use: The technical core of “an organism is a system that keeps making its own boundary.” Quote the first clause only and paraphrase the rest in plain words.
“the immune system is more concerned with entities that do damage than with those that are foreign.”
- Polly Matzinger, “The Danger Model: A Renewed Sense of Self,” Science 296 (2002): 301–305, abstract. [verified: https://people.scs.carleton.ca/~soma/biosec/readings/matzinger-science.pdf]
- Use: Even the body’s own “self-detector” doesn’t enforce a clean self/non-self line. It responds to context and harm. Pair with her questions about pregnancy, puberty and lactation (“what happens when ‘self’ changes?”).
“Where does the mind stop and the rest of the world begin? The question invites two standard replies. Some accept the boundaries of skin and skull, and say that what is outside the body is outside the mind.”
- Andy Clark & David Chalmers, “The Extended Mind,” Analysis 58.1 (1998): 7–19, p. 7. [verified: https://www.alice.id.tue.nl/references/clark-chalmers-1998.pdf]
- Use: Puts the chapter’s question in one line and opens the Otto’s-notebook example. It also bridges to Chapter 6’s information world.
“autonomous systems are hierarchically composed of Markov blankets of Markov blankets—all the way down to individual cells, all the way up to you and me, and all the way out to include elements of the local environment.”
- Michael Kirchhoff, Thomas Parr, Ensor Palacios, Karl Friston & Julian Kiverstein, “The Markov blankets of life: autonomy, active inference and the free energy principle,” J. R. Soc. Interface 15 (2018): 20170792, abstract. [verified: https://api.semanticscholar.org/graph/v1/paper/DOI:10.1098/rsif.2017.0792?fields=title,abstract]
- Use: A modern formal statement of nested boundaries and of boundaries that reach past the skin. Present it as one contested framework, not proof.
“Taken together, the relations of genes, organisms, and environment are reciprocal relations in which all three elements are both causes and effects.”
- Richard Lewontin, The Triple Helix: Gene, Organism, and Environment (Harvard UP, 2000), pp. 100–101. [verified: https://2think.org/triplehelix.shtml] (secondary review quoting the book; confirm page in a copy)
- Use: The “world acts on us, we act on the world” half. Blocks the reading of “environment” as a fixed backdrop.
“No man is an island, entire of itself; every man is a piece of the continent, a part of the main.”
- John Donne, Devotions upon Emergent Occasions (1624), Meditation XVII (modernized spelling, Project Gutenberg ed.). [verified: https://www.gutenberg.org/cache/epub/23772/pg23772.txt]
- Use: The familiar version of the claim, useful as an epigraph or foil. The chapter can say it adds the mechanism Donne lacked: how we are part of the main, and why it’s still useful to act as an island.

Counterarguments and limits

“Some boundaries are just real.” The cell membrane isn’t a matter of perspective. Stress that the first blade is both found and drawn. Life makes real boundaries, and we choose which of them to treat as “me.” Don’t collapse into “it’s all constructed.”
“Everything is connected” explains nothing. If the chapter only says the line is porous, it’s a greeting card. It needs criteria: density of interaction, self-maintenance (autopoiesis), what fails if the crossing stops. Casati & Varzi’s Parts and Places separates bona fide boundaries from fiat ones, which is useful here.
Extended mind is contested. Adams & Aizawa (“The Bounds of Cognition,” 2001/2008) argue that coupling isn’t constitution: using a notebook doesn’t make it part of your mind. Present Clark & Chalmers as a live question, not a result.
Free-energy/Markov-blanket overreach. Critics (Bruineberg, Dołęga, Dewhurst & Baltieri, “The Emperor’s New Markov Blankets,” BBS 2022) argue that the formal statistical notion is being stretched into a metaphysical boundary. The chapter shouldn’t lean on it as proof.
Merleau-Ponty’s cane and disability. Reynolds (2018) and others note that the cane example is an able-bodied thought experiment about blind people. If used, acknowledge this or use one’s own tool experience (a pen, a bike, a car).
Popular numbers are shaky. “98% of atoms replaced yearly” and “you’re a new person every 7 years” are loosely sourced. Tissue turnover varies enormously, and some neurons and lens cells last a lifetime. Use Spalding’s tissue-specific data or drop the claim.
The individualist objection. Some readers will hear “you’re never isolated” as an attack on personal responsibility. The chapter says treating ourselves as units is useful, so keep that balance: both the self-made myth and “the environment did it” are fictions of convenience.
The self isn’t only biological. Chapter 4 raised subjectivity. A strictly organismic boundary may seem to skip the experienced self. The earlier draft’s line that the blade is “a functional lens,” not a claim about consciousness, is a good guard. Keep it.
Scale confusion. Calling a nation or a company “a system like an organism” can slide into organicist politics (the state as a body, dissidents as disease). Flag that the lens transfers, but the moral weight of organisms doesn’t automatically.

Connections

Ch. 1 (Before Thought, There Is Want): Wanting is what separates a someone from their surroundings. Ch. 5 gives that separation a physical and systemic form: the boundary is where wants are kept.
Ch. 2 (Will Creates Difference): Many systems in one ecosystem. Each one’s environment is largely other systems (Simon’s ant, niche construction).
Ch. 3 (Love, Growth, and Meaning): Wants that include others are a loosened boundary. Donne’s continent, and the earlier draft’s “I cannot take that on” passage, fit here.
Ch. 4 (From Subjectivity…): Direct predecessor. “Know thyself” becomes “know where you drew yourself.” The Umwelt idea extends Ch. 4’s filters.
Ch. 6 (Reality and Representation): Uexküll’s tick and Otto’s notebook lead in. The world side of the first cut is already a selected world, and information crosses the boundary as well as matter.
Ch. 7 (Good, Bad): Good and bad begin as what keeps a boundary intact or breaks it (survival). Bernard’s steady inside is the first value.
Ch. 8 (What Is Not a Cut?): Test me/world hard. Is it a true duality, or a gradient with no sharp line?
Ch. 9 (Cost of the Blade): Forgetting the environment makes the individual feel more real than warranted (blame, credit, self-made myths).
Ch. 10 (Thingification): “The individual” as a legal and economic thing that loops back on how people see themselves.
Ch. 18 (Loops That Learn): Organism and environment as a feedback loop, and the self-referential loop (Hofstadter) that makes an I.
Act I close (Unnatural in Volition): Our freedom depends on Bernard’s steady inside, and on how far we can extend the boundary with tools.

Exercise ideas

The five-minute border log. Sit still for five minutes with a notebook. Every time something crosses your boundary, write it in one of two columns: in (breath, a sound, light, a sip of water, a thought from something you read) and out (breath, heat, a sigh, a word). Afterwards, circle the items you would have died without within a day. Notice: how long the list gets, how little of it you normally register, and that most crossings are automatic. Why: It makes “never a closed system” something you’ve counted, not something you’ve been told, and it shows why ignoring the crossings is usually convenient.
Where does the self begin? (the pen test). Close your eyes and run a pen or a stick lightly over a textured surface: a table edge, a brick, the fabric of your clothes. Try to feel where the texture is. Then attend only to the pressure in your fingers. Switch back and forth. Notice: when absorbed, you feel the surface at the pen’s tip, and the pen drops out of awareness, as in Bateson’s and Merleau-Ponty’s cane. When you attend to your fingers, the pen becomes an object again. Why: You watch your own me/world line move in real time, which shows the first blade is drawn by use and attention, not fixed by skin.
Two stories of one event. Pick something that went well or badly for you this week. Write it twice in three sentences each: once as if you were a sealed system (“I did X because I…”), once naming every environmental input (sleep, weather, who was there, what you had eaten, what the room was like). Notice: which version feels truer, which feels more useful for deciding what to do next, and what each one hides. Why: It shows the chapter’s double claim directly: the isolated-self model is useful and incomplete at the same time.

Open questions for the author

Order of moves. Open on the felt, first-person edge (waking in the dark, the pen test) and then build the systems view, or open with the cell membrane and work up to persons? The earlier draft opens experientially.
How technical? Should “system,” “open/closed/isolated,” “autopoiesis,” and “Markov blanket” appear by name, or be kept to plain words with a note or sidebar?
The extended self. How far should the chapter go: include tools and notebooks (Clark & Chalmers), or stop at the organism and leave mind-extension for Chapter 6?
Groups as systems. The Must line says “organism.” Does this chapter show families, firms and civilizations as nested systems, or save that for Ch. 2 and Act III?
Immunity. Keep Matzinger’s danger model (vivid, but a technical detour), or cut it to one sentence?
“Useful fiction” framing. Is the isolated self best called a fiction, a model, or an approximation? The word choice affects how Ch. 9’s “cost of the blade” lands.
Spencer-Brown. The quote-options section opens with Laws of Form. Should the chapter introduce the blade metaphor formally here (mark, cross, space), or keep Spencer-Brown as an epigraph only?
Title. The earlier draft was “The Catastrophic Invention of Edges.” Is “catastrophic” still intended now that the chapter stresses the cut is useful?
Exercise link. The earlier draft links to /practice/edges (“Where do you end?”). Should it be replaced by one of the exercises above, or rewritten to match?

Reader perspectives

Curious young child

First reactions:

“A blade? Like a knife? Who’s getting cut?” The word is taken literally and slightly scary before anything else lands. The chapter has to say early that the blade is a pretend knife that sorts, not one that hurts.
The opening, waking in the dark and not knowing where your body ends, really works. Every kid has woken up in a sleepover bed or a hotel and had that moment. The foot finding the cold floor is the best line in the draft.
“My skin is where I stop. Obviously.” Then comes a flicker of doubt: what about my breath, my spit, my hair when Mum cuts it?
The leaf paragraph (shade, food, species, tissue, molecules, caterpillar hiding place) is fun. It would be more fun as a game of “how many things can a leaf be?”
The adult paragraph about saying “I cannot take that on” loses the child completely. That’s grown-up work talk.

Questions they’d ask:

“If I cut my hair, is the hair on the floor still me? When does it stop being me?”
“Is my poop me? It was inside me. And my wee? And the food before I swallowed it?”
“When I’m holding my brother’s hand, where do I end and where does he start?”
“Is my baby tooth under the pillow still me? The tooth fairy takes it, so is she taking a bit of me?”
“If there are bugs living in my tummy, are they me, or are they renting?”
“Why can’t I just be all by myself, with nothing touching me? What would happen?” (the isolation question, asked plainly)
“Does my dog think he stops at his fur? Does a worm know where it stops?”
“If I’m in the bath, is the water me? It’s touching every bit of me.”
“When I breathe out and my sister breathes it in, is a bit of me inside her now? Gross.”
“Is my shadow me? It goes where I go.”
“Why is it ‘easier’ to pretend I’m by myself if I’m not really?”
“What’s ‘the universe’s outer system’? Is it outer space? Am I inside outer space right now?”

Where they’d get lost, bored, offended or unconvinced:

“System,” “outer system,” “functional lens,” “autopoiesis,” “narratable”: none of these words mean anything yet. The brief’s key idea, a system inside a bigger system, needs a picture: a fish in a fishbowl in a room in a house.
The draft states the main point (“the environment always acts on us”) but never shows it acting on a body the reader can feel: cold making goosebumps, the sun making you squint, being hungry because of the time.
The immune system paragraph (self/non-self, damage, tolerance) is the most interesting part to a kid, since it’s about germs, but it’s squashed into one abstract sentence. They’d want to hear what the body actually does with a splinter.
The paragraph starting “There is a fair objection here” (newborn, bacterium, consciousness, souls) would feel like the grown-ups arguing over their head.
The old title “The Catastrophic Invention of Edges” would scare or baffle them. Why is an edge a catastrophe?
Unconvinced moment: “You say I’m never alone from the world, but when I’m under my blanket in a fort I AM alone.” The chapter should take the blanket fort seriously and then point out the air, the warmth and the sound of the TV getting in.

Examples they’d bring:

The blanket fort: a boundary you build on purpose. It keeps things out (little brother) but still lets air, light and the smell of dinner in, so the edge is real and it leaks.
Hair, nails, baby teeth, scabs: bits that were you and then aren’t. That gives the “when does inside become outside?” question a kid-sized test.
Tummy bacteria: the real, weird fact that a human body carries roughly as many bacterial cells as human ones (Sender, Fuchs & Milo, “Revised Estimates for the Number of Human and Bacteria Cells in the Body,” PLOS Biology, 2016, estimate about 1.3 bacterial cells per human cell). The reaction would be “So I’m half bugs?!” That makes an excellent hook for “never a closed system.”
An ant on the sand: a kid watching an ant zigzag at the beach is exactly Herbert Simon’s ant (quote option 3 is already in the packet). The ant is simple and the beach makes it wiggly. That example is ready-made for children.
A goldfish in a bowl: a system inside a system that dies if you change the water wrong. The fish can’t be “by itself.”
The tick: Uexküll’s tick waiting on a branch for the smell of a passing mammal (from A Foray into the Worlds of Animals and Humans, already in further reading). Its whole world is basically smell, warmth and hair, and kids love a gross creature with a tiny world.

What would win them over:

A “Where do I stop?” game with a list (hair on your head, hair in the brush, breath, the apple in your mouth, the apple in your tummy, the bugs in your tummy, your shadow) and a vote on each.
Admitting that pretending you’re alone is useful, like pretending the fort is a castle. It helps you play, but the air still comes in.
One truly weird fact per page: the half-bugs fact, the tick, the ant.
Saying plainly that “the blade” is an imaginary knife for sorting and nobody gets hurt.

Cynical adult

First reactions:

“I am a system inside a bigger system” is the kind of sentence that sounds deep at 1 a.m. and is a poster at 9 a.m. The brief has to earn it, not announce it.
The draft opens with waking in a dark room, the standard mindfulness-app cold open. I’ve read this paragraph in five other books.
Half the chapter is qualifications (“the lesson is modest”, “neither more boundary nor less boundary is automatically wiser”). If the lesson is that modest, why is it a chapter?
The Simon ant quote actually interests me. It’s the one thing here that tells me something I didn’t already assume: my “complexity” might be mostly my surroundings. Lead with that.
The word “blade” is doing branding work. Three blades sounds like a system someone wants to sell me a workbook for.

Questions they’d ask:

So what? What do I do differently on Monday once I “see myself as a system in an environment”?
If I’m never isolated, and treating myself as isolated is “usually easier and useful,” then the practical advice is “keep doing what you’re doing.” Is that it?
How is this different from Alan Watts’s “skin-encapsulated ego,” or any Buddhist sermon on interdependence? What’s new?
You say the boundary is “an achievement, not a wall” (Maturana and Varela). Achieved by whom? That sounds like a metaphor pretending to be a mechanism.
If the environment always acts on me, where does responsibility go? Is this the “it’s not your fault, it’s the system” move?
The Matzinger danger model: is it accepted immunology or one contested theory you picked because it fits? Tell me which.
Where exactly does “me” end on this view: skin, gut bacteria, phone, the spouse who remembers my appointments? Pick one or tell me honestly that there’s no answer.
Why is this the first cut? Newborns don’t start with it. Is “first” a logical order, a developmental claim, or just the order of the chapters?
Schrödinger’s “negative entropy”: is that still how physicists talk, or a 1944 phrase that sounds good? (Your own note says he later preferred “free energy.” Then say so in the text.)
The boundary-setting paragraph (“I cannot take that on”) drifts into therapy-speak. Is this a systems chapter or a relationships chapter?
What would a wrong version of the first cut look like, and has anyone ever been harmed by drawing it badly? If not, why should I care?

Where they’d get lost, bored, offended or unconvinced:

The leaf paragraph (shade, food, species, tissue, molecules) is a list of perspectives with no payoff. I nodded and forgot it.
“Human selves make that distinction narratable, arguable, and sometimes beautifully inconvenient.” “Beautifully inconvenient” is where I roll my eyes. It’s a greeting-card clause.
The objection paragraph (“Perhaps ‘self’ is already too large a word… Agreed.”) concedes so much that the functional lens seems to claim nothing.
The practice link (“Where do you end?”, breath, water, cup) is a guided meditation. I’d skip it unless the text tells me what I’m supposed to find, and what it would mean if I found something else.
The brief promises a systems view, but the draft has no system in it: no inputs, outputs, feedback or boundary conditions. It’s just talk about edges.
Muir’s “hitched to everything else” is lovely and exactly what a nature calendar would print. On its own it’ll read as sentiment.

Examples they’d bring:

Caffeine and sleep. I blame “myself” for a bad afternoon, but it was the 3 p.m. espresso, the open-plan office and the kid up at 4. That’s the first cut drawn wrong in real time: I billed the environment’s work to “me.”
Antibiotics wrecking digestion. A course of antibiotics changes how you feel for weeks, a plain case of the “inside” being partly outside organisms. No invented study needed; any GP will tell you about antibiotic-associated diarrhea.
Simon’s ant, applied to the office. The colleague who looks “brilliant” in one team and useless in another. How much of performance is the person and how much is the terrain? Every manager has seen this.
Glasses, hearing aids, the phone. If my phone holds my calendar and contacts, is losing it a loss of “world” or of “me”? Clark and Chalmers’s “The Extended Mind” (Analysis, 1998) argues exactly this with the case of Otto’s notebook. Cite that instead of hinting.
Lockdown. Millions of people found out in 2020 how much of their “personality” was commute, office, gym and pub. That’s the boundary experiment the whole world ran.

What would win them over:

A concrete payoff: show that drawing the me/world line in the wrong place leads to a specific, common mistake (blaming yourself for the environment’s doing, or the reverse) and give a quick test for which it is.
Lead with Simon’s ant and make the chapter an argument, not a mood: “much of what you think is you is your terrain, so change the terrain before you try to change your character.”
One honest paragraph on what’s contested (where the self ends, the immunology debate) stated plainly, without the soft hedging all through the draft.
Cut the lyrical openings. If the prose trusted the idea, it wouldn’t need to set the mood.

Believer / spiritual reader

First reactions:

The waking-in-the-dark opening is lovely. The foot finding the floor feels like the moment before morning prayer. A Jewish reader will think of Modeh Ani, the thanks said on waking for the soul being returned. The book gives the same moment as bare function and nothing else.
“An organism as a system within the outer system of the universe” sounds like Acts 17:28 (“For in him we live, and move, and have our being,” KJV) with God swapped for “the universe.” A Christian reader will notice the swap and wonder whether it is deliberate.
Relief at the draft’s line that “the blade is not a claim about consciousness, souls…” This reader has been braced since the book’s goal statement about “being cheated by religions.” The disclaimer eases that, but it also comes across as sidestepping the question they care about most.
Buddhist and Hindu readers will say this chapter is ancient news. Non-self (anattā) and the Upanishadic identity of self and ground (tat tvam asi, Chandogya Upanishad 6.8.7) both say the edge between me and world is useful and not final. They’d want credit given, not a rediscovery.
The immune-system material and Maturana & Varela feel cold, though the Muir quote (“hitched to everything else in the universe”) warms it. Muir was a deeply religious nature writer, and this reader will enjoy seeing him here.

Questions they’d ask:

If the environment always acts on me, is “the environment” the whole story, or is there a Giver behind the givenness? Does the book leave room for that question or quietly close it?
You say the self is “a functional lens.” Is it only that? My tradition says I am dust (Genesis 3:19) and breathed-into (Genesis 2:7). Can your systems view hold both halves?
Buddhism already says the boundary is conventional. What does your first blade add to the teaching on the five aggregates (khandhas)?
Where does “we” come in? Ubuntu (umuntu ngumuntu ngabantu, a person is a person through other persons) makes the first boundary run between us and the world, not between me and the world. Why start with an individual organism?
Is prayer a crossing of the boundary, a strengthening of it, or neither?
Chapter 4 was “know thyself,” the Delphic maxim carved at a temple. Will the book admit it borrowed a religious injunction and then secularized it?
When a monk renounces possessions, or a Sufi seeks fanā’ (annihilation of the self in God), are they cutting the blade differently or putting it down? Is that a legitimate move in your framework or a pathology?
If the boundary is “an achievement, not a wall,” who or what is doing the achieving?
Does “treating ourselves as isolated is easier and useful” smuggle in a modern Western individualism that most traditions would call a spiritual illness?
Your “where do you end?” exercise uses breath. Why not say plainly that breath is where nearly every contemplative tradition starts, from pranayama to the Jesus Prayer to ānāpānasati?

Where they’d get lost, bored, offended or unconvinced:

Offended (mildly): “Human selves make that distinction narratable, arguable, and sometimes beautifully inconvenient.” Coming right after “not a claim about souls,” this reads as a polite wave-off. The reader wants either real engagement or silence, not a pat on the head.
Unconvinced: The brief says the environment “always acts on us” and stops there. A believer asks whether we act back, and whether anything acts on us that is not environment. If “outer system of the universe” is meant to be everything, say so openly and own it as a stance.
Bored: The Matzinger danger model and the immune-passport discussion. It is accurate, but it reads like a biology aside, and it arrives just when the reader was ready for the existential point.
Lost: The Spencer-Brown quote (“a universe comes into being when a space is severed”) will sound like Genesis 1 to a religious reader: “And God divided the light from the darkness” (Genesis 1:4, KJV). If the book doesn’t notice the echo, the reader will think the author missed it.
Wary: The goal statement’s “cheated by religions” hangs over every chapter. Here, where the material is so close to contemplative teaching, the reader will feel the book is taking the insight and dismissing the teachers.

Examples they’d bring:

Ash Wednesday: a thumb of ash on the forehead and the words “Remember that you are dust, and to dust you shall return” (from Genesis 3:19). It is a yearly ritual whose whole purpose is to thin the me/world boundary and show that the body belongs to the ground.
John Donne, Devotions upon Emergent Occasions (1624), Meditation XVII: “No man is an island, entire of itself; every man is a piece of the continent, a part of the main.” It is the chapter’s “never a system in complete isolation,” written as a sermon on a funeral bell.
Thich Nhat Hanh’s “interbeing,” The Heart of Understanding (1988): he looks into a sheet of paper and sees the cloud, the rain and the logger in it. It is a meditation practice built on exactly this chapter’s claim, and it could replace or accompany the cup exercise.
The Chandogya Upanishad, 6th prapāṭhaka: Uddalaka teaches his son Svetaketu with salt dissolved in water. The boy can’t see the salt, but it is in every sip. It is a teaching story about where a boundary goes when you can no longer see it.
Tawaf at the Kaaba: thousands circling as one body. Pilgrims often describe the self/crowd edge dissolving. It is a lived, embodied case of “we” as the unit instead of “me.”

What would win them over:

Acknowledge in one or two sentences that contemplative traditions have mapped this blade for millennia, from non-self to “no man is an island,” and say what a systems vocabulary adds: precision, testability, a shared language across traditions. Don’t imply the ideas are new.
Keep the question of what lies beyond “the outer system” honestly open. Something like: “this book doesn’t settle whether the universe is the last word” would keep the religious reader reading.
Treat practices like breath meditation or fasting as experiments on the first blade that people have run for centuries. That respects ritual as knowledge-seeking, which is the book’s own value.
Keep the Muir quote. A believer will trust a chapter that lets a reverent voice speak.

Skeptical scientist

First reactions:

The brief uses “system in complete isolation” loosely. Physics separates isolated systems (no exchange of energy or matter), closed systems (energy but not matter) and open systems (both). Every organism is open. That isn’t a nuance to concede partway through; it’s the definition. Say it on page one and the chapter’s central tension becomes a precise claim instead of a mood.
“An organism as a system within the outer system of the universe” skips all the intermediate scales where the boundary actually gets drawn: membrane, tissue, body, colony, holobiont, niche. “Me and world” is one cut among a nested set. The chapter would be stronger if it showed that the cut moves, and what decides where it goes in each case.
The earlier draft’s paragraph on immunity is fair, but it hands Matzinger’s danger model more authority than it has. It’s influential and still contested. Janeway’s pattern-recognition account (1989, “Approaching the asymptote? Evolution and revolution in immunology,” Cold Spring Harbor Symposia on Quantitative Biology) and the classical self/non-self framework remain in active use. Call it a live debate, not a settled correction.
The Schrödinger “negative entropy” quote is lovely, but a physicist will wince unless the book adds his own caveat right beside it: the accurate term is free energy. The chapter notes mention it. The text has to say it too.
Opening on “not knowing where your body ends in the dark” is good. Behind it sits a real, well-studied science of body ownership that the draft doesn’t use at all.

Questions they’d ask:

By “system,” do you mean something thermodynamic, cybernetic (a feedback controller), or autopoietic (self-producing)? They draw the boundary in different places.
Is the boundary a property of the organism, or of the observer’s choice of variables? Why did you pick the answer you picked?
Where does a Portuguese man o’ war end? It’s a colony of specialised zooids that behaves as one animal. Is it one “me” or many?
Roughly half the cells in your body aren’t human (Sender, Fuchs & Milo 2016, PLoS Biology, “Revised estimates for the number of human and bacteria cells in the body,” which puts the ratio near 1:1 and retires the old 10:1 figure). Are they “me” or “world”?
Your mitochondria were free-living bacteria once (endosymbiosis, from Margulis’s 1967 paper “On the origin of mitosing cells”). When did world become me?
If a macaque’s hand-centred neurons extend their receptive fields along a rake after tool training (Iriki, Tanaka & Iwamura 1996, NeuroReport), where is the macaque’s edge?
Are you using “Markov blanket” in the background? If so, have you read the critique that the free-energy literature slides between a formal statistical boundary and a physical one (Bruineberg et al. 2022, “The emperor’s new Markov blankets,” Behavioral and Brain Sciences)?
What is the evidence that treating ourselves as isolated is “usually easier and useful”? Useful for which predictions, and when does it fail measurably?
Does a bacterium make a “cut” in any sense your book wants, or is that a metaphor imported from human cognition?
What experiment would show that someone drew the first blade in the wrong place?

Where they’d get lost, bored, offended or unconvinced:

The draft line “living systems maintain some distinction between conditions to preserve and conditions to meet” is homeostasis described vaguely. Name homeostasis (and allostasis, if you want the predictive version) and cite it, or the reader who knows the term will think you’re reinventing it.
“The world… contains far more detail than any one organism can use”: true. It’s also Uexküll’s Umwelt, which the further reading lists but the text never puts to work. A tick’s three cues (butyric acid, warmth, hair) would do more than the leaf passage.
The objection paragraph (“Perhaps ‘self’ is already too large a word”) says the blade makes no claim about consciousness. The Act I lead-in is all about wanting and an “I”, though. The reader will ask which self is meant: immunological, bodily, or narrative. Pick one per paragraph.
Bateson’s “mind is not limited by the skin” will read as mysticism to a lab scientist unless it’s tied to something testable, such as extended-cognition arguments or tool-use remapping.

Examples they’d bring:

E. coli chemotaxis (Berg & Brown 1972, Nature, “Chemotaxis in Escherichia coli analysed by three-dimensional tracking”). A cell that compares attractant concentration over time and biases its run-and-tumble swimming. This is the simplest real me/world cut: a membrane, receptors, and a memory about a second long.
Rubber hand illusion (Botvinick & Cohen 1998, Nature, “Rubber hands ‘feel’ touch that eyes see”). Synchronous stroking makes people feel a fake hand as their own. The body boundary is inferred, not given. It fits the “in the dark” opening exactly.
Ian Waterman, who lost proprioception from the neck down and relearned movement by sight (Jonathan Cole, Pride and a Daily Marathon, 1991). What it’s like when the felt edge disappears and has to be rebuilt deliberately.
Niche construction: beaver dams, earthworm soil (Odling-Smee, Laland & Feldman, Niche Construction, 2003). The organism reshapes the environment that then selects it, so the cut runs in both directions. This also sets up Chapter 6’s loop.
Siphonophores, lichens, and the Pando aspen clone: three well-documented cases where “one organism” is itself a choice of boundary.
Isolated vs closed vs open system: a sealed thermos against a sealed jar in sunlight against a living cell. A one-line physics lesson that turns the brief into something precise.

What would win them over:

An explicit statement that the me/world boundary is scale- and question-dependent, with two or three cases showing it moving (cell, body, colony).
Correct terms (open system, homeostasis, free energy, Umwelt) used once, defined and kept consistent.
Showing a case where treating yourself as isolated gives a wrong prediction, for example ignoring the microbiome’s role in drug metabolism, rather than just asserting the approximation is “usually useful.”
Honest labelling of which accounts are consensus and which are contested (danger model, autopoiesis, Markov blankets).

Earlier draft

From “The First Blade: The Catastrophic Invention of Edges”

You wake in an unfamiliar room and, for one soft second, do not know where your body ends in the dark. Then your foot finds the floor. The room becomes outside; your cold toes become inside. A boundary has returned before you have had a thought about it.

This is not a grand philosophical achievement. It is a practical one. A creature has limited time, attention, and senses. It cannot take in every sound in the building, every cell in its skin, every consequence of its next movement. It selects. It treats some changes as happening to it, some as happening around it, and some as worth acting on. The first blade is the name for that usable edge: me and world.

The world does not need to be literally infinite, fractal, or chaotic for this to be necessary. We need only notice that it contains far more detail than any one organism can use at a moment. A leaf can be seen as shade, food, a species, tissue, molecules, or a place for a caterpillar to hide. Each description may be useful; none exhausts the leaf. Finite creatures make their lives by keeping a small amount in view and letting the rest recede.

Biology offers real boundaries, though they are not the clean walls our metaphors promise. A cell membrane controls traffic while continually exchanging material. Skin marks a body while sweat, breath, touch, microbes, food, and care cross it all day. Even immunity is more complicated than a permanent passport check: the familiar self/non-self picture has been challenged by accounts that emphasize damage, context, and tolerance as well as foreignness. The lesson is modest. A boundary can be real and necessary without being final.

The same is true in ordinary life. A person who says, “I cannot take that on,” may be protecting time, health, or a fragile promise to someone else. A person who says it too quickly may be making a wall where a request for help was possible. Neither more boundary nor less boundary is automatically wiser. The question is what the edge is doing, for whom, and at what cost.

There is a fair objection here. Perhaps “self” is already too large a word. A newborn, a bacterium, an immune system, and an adult making a difficult promise do not share one settled kind of inner life. Agreed. The blade is not a claim about consciousness, souls, or the sequence in which a mind develops. It is a functional lens: living systems maintain some distinction between conditions to preserve and conditions to meet. Human selves make that distinction narratable, arguable, and sometimes beautifully inconvenient.

Try Where do you end?. Consider a breath, a sip of water, and a cup in your hand. Being inside your skin, helping your activity continue, and being something you call “me” are different tests. Draw one useful boundary and notice what keeps crossing it. A border can do its job without declaring independence from the world.

Once there is an edge, there can be a view from it. That view does not deliver the world whole; it delivers a working picture.