Coded to Change
On the difference between the values that cannot move and the self that must — and what biology has always known about both
This essay is a companion to The Leader Who Dies Each Night.
I. The Objection
If you read the companion essay to this one, you may have arrived here with a question.
The argument there was that the most vital leaders practice a kind of daily renewal, releasing the accumulated weight of yesterday's identity and reassembling themselves each morning around what actually matters. The self is not a fixed thing but a construction, rebuilt nightly, and good leadership involves doing that rebuilding consciously rather than automatically.
It is a compelling idea, but if you lead people, you likely felt the tension in it immediately.
People need to know who they are following. Teams need to be able to predict, at some meaningful level, how their leader will behave. Organizations are built on the assumption that the person who made a commitment yesterday will honor it today. If the leader is dissolving and reassembling every night, what exactly is the team supposed to hold onto?
This is not a trivial concern. It is the central challenge of leading through uncertainty, leading through change, and leading people who have been let down before. The question is not whether consistency matters, it does. The question is what kind of consistency actually builds trust, and what kind merely performs it.
Life itself has been working on this problem for about four billion years. The solution it arrived at is more elegant, and more instructive, than anything in the leadership literature.
II. The Architecture of the Cell
Inside every living cell, there is a division of labor so fundamental that without it, life as we know it cannot exist.
DNA is the master code. It lives in the nucleus, protected, never leaving, never being consumed by the work of the cell. It does not respond directly to the environment, does not change when the cell is stressed, flooded with nutrients, or deprived of oxygen. It holds the complete instructions for who this organism is, conserved across billions of cellular replications, maintained with extraordinary fidelity. In the language of genetics, DNA is the most protected molecule in biology.
RNA is something else entirely. It reads the DNA, carries the instruction out of the nucleus and into the cell, and builds what the moment requires. Responsive by design, it degrades after use, sometimes within minutes. Where DNA is permanent, RNA is disposable. Where DNA holds the code, RNA expresses it, differently in different cells, under different conditions, in response to signals from the environment.
The cell does not work if DNA tries to do RNA's job. The master code cannot leave the nucleus and start responding to every environmental signal; that way lies the dissolution of identity. Nor does the cell work if RNA tries to be DNA, insisting on its own permanence, refusing to be updated by new transcription. Rigidity in biology is almost always a precursor to death - evolve or die.
What keeps the organism alive, what allows it to be simultaneously stable and adaptive, conserved and responsive, is the precise relationship between these two things. The code that cannot be rewritten, and the signal that must be.
This is not a metaphor borrowed from biology to illustrate a leadership point but a description of how life organizes itself at the most fundamental level we can observe. It also maps, with remarkable precision, onto the problem of leading people through change.
III. The Code You Cannot Rewrite
In the leader, DNA is values. Not values in the corporate sense, not the framed list in the conference room or the three words on the careers page. Values in the Frankfurt sense: commitments so constitutive of who you are that under pressure, you discover you are incapable of betraying them without ceasing to be yourself.
The philosopher Harry Frankfurt, in his essay On Caring, draws a distinction between things we merely prefer and things we care about in a way that defines us. To care about something in this sense is not to have decided it matters - it is to find, in moments of genuine cost, that you cannot act as if it does not. That incapacity, that inability to simply trade the thing away when it becomes inconvenient, is what a real value actually is.
Most leaders, if they are honest, have fewer of these than they think. What they have in droves are preferences that feel like values until they are tested; commitments that hold in calm conditions but prove negotiable under pressure. This is not a moral indictment. It is human. Identifying your true code is not a visioning exercise. It is an excavation. You find it not by asking what you value but by examining what you have never been willing to betray, even when betrayal would have been easy and discreet.
The test is always the same: did honoring this cost you something real? A relationship, an opportunity, approval, comfort, money, advantage? If you can point to a moment where you held to something at genuine cost, you have found a strand of your code. If the value has never been tested, it may be aspiration rather than architecture.
This is the part of you that your team needs to be permanent. Not your mood, not your management style, not your preferred way of running a meeting. Those are RNA. They should change, and frequently. What cannot change, what must be held with the same fidelity that the nucleus holds its DNA, is the strand of who you actually are. The thing that persists through every version of you.
IV. The Signal That Must Move
Everything else is RNA.
Leadership style. Communication register. How you deliver feedback, how you respond to failure, how much of yourself you disclose and when, what you celebrate and how. The texture of your presence in a room. Your current theory of what the organization needs. Your read on a particular person's development. All of this is signal, not code, and all of it should be responsive, to the people in the room, to what you are learning, to the season the organization is in, to what the previous approach revealed about its own limitations.
This is where the daily renewal practice from the companion essay lives. When a leader consciously releases yesterday's self and reassembles each morning, it is primarily the signal layer that changes. The approach to a difficult conversation may shift. The tone in a team meeting may be different. A position held for months may be updated in light of new information. The signal is being rewritten in response to what the environment is actually asking for.
The leaders who stop renewing themselves are usually identifiable by how fixed their signal has become. They have a way they do things, a set of moves they reach for regardless of what the situation calls for. They have confused their style with their substance, protected the signal as if it were the code. This means they have effectively lost the use of both. The code provides no real hold because it has never been separated from the performance around it. The signal provides no real responsiveness because it stopped being updated years ago.
The healthiest version of this dynamic is a leader whose signal is visibly, even dramatically, responsive, and whose code is visibly, even dramatically, immovable. The team can watch them change and trust them precisely because the changes are never in the direction of what the leader truly stands for. The flexibility is possible because the foundation is real. The RNA can be ephemeral because the DNA is protected.
V. What the Forest Knows
Beneath almost every forest on earth, beneath the oak trees and the Douglas firs and the ancient redwoods, there exists a network that most people have only recently begun to understand. Mycorrhizal fungi weave themselves through the soil in filaments so fine and vast that a single teaspoon of healthy forest soil can contain miles of them. They connect the root systems of individual trees into something that functions less like a collection of separate organisms and more like a single distributed intelligence.
Through this network, trees share nutrients. Carbon flows from trees with surplus to trees in deficit. When a tree is under attack from insects, it sends chemical signals through the fungal web that prompt its neighbors to begin producing defensive compounds before the insects arrive. When an old tree is dying, it releases a disproportionate pulse of resources into the network, a kind of biological bequest to the community it has been part of for centuries.
The network itself is neither the trees nor the fungi alone. It is the relationship between them, the living architecture of exchange that makes the forest function as a whole rather than as a collection of competing individuals. The ecologist Suzanne Simard, whose decades of research revealed the depth of this system, calls the oldest, most connected trees the “Mother Trees.” They are not directing the forest. They are anchoring it, providing the stable nodes through which the most critical exchanges flow.
This is what a movement looks like when it is working.
The leader is not the whole forest. The leader is, ideally, a mother tree, a node of sufficient rootedness and connection that others can route their exchanges through it. The mycorrhizal network is the culture: the invisible web of shared values, mutual obligation, and accumulated trust that allows resources, information, and care to flow between people who may never meet directly.
What keeps this network alive is the same dynamic as the cell. The fungal threads are the code: slow-growing, persistent, underground, not visible in the daily life of the forest but absolutely foundational to it. The above-ground expressions, the growth of individual trees, the seasonal responses, the way the canopy shifts with light and weather, are the signal: responsive, visible, ephemeral in the scale of the forest's life, expressive of an underlying stability that is never in question.
A forest that loses its mycorrhizal network does not immediately appear sick. The trees may stand for years after the network degrades, but they are increasingly isolated, unable to share resources in stress, unable to signal threat, unable to support their weakest members. They look like a forest, but no longer function as one.
Organizations and movements fail the same way. The visible structure remains. The people are still there - but the invisible network, the shared code, the living culture of mutual commitment, has quietly degraded. What remains is a collection of individuals who happen to occupy the same space, not a community capable of coherent response to pressure.
VI. Conserved and Expressed
There is a term in genetics for sequences of DNA maintained almost unchanged across hundreds of millions of years of evolution: conserved sequences. They appear in organisms as different as yeast and humans in nearly identical form, because natural selection has determined, over and over again, that these sequences are too important to experiment with. Evolution, which is otherwise extraordinarily creative and relentlessly experimental, treats these sequences with something close to reverence.
The most fundamental values of a leader, and of a movement, are like this. Not conservative in the political sense. They may be radical, even disruptive - but conserved in the biological sense - held with a fidelity that transcends circumstance, defended against the pressure to dilute them for short-term advantage, maintained through every version of the organism because they are too fundamental to risk.
What gets expressed varies enormously. The same genetic code produces different expressions in a liver cell and a neuron, in a seedling and a century-old tree, in a movement in its founding year and a movement in its maturity. The expression is always contextual. The code is always conserved.
In practice this looks like a leader whose tone differs in a one-on-one and a town hall. Whose approach to conflict has evolved significantly over five years. Who has reversed public positions, updated their model of the organization, changed their mind about people and strategies and priorities. Who is, in the signal layer, visibly different from who they were.
And who has never, not once, compromised on the handful of things that constitute their actual code. Whose code has been made legible not through proclamation but through the accumulated evidence of choices made under pressure. Who everyone in the organization could name, without hesitation, as the things this leader will not trade.
That leader is not consistent in the way that word is usually meant. They are something more durable: conserved.
VII. When the Pressure Comes
None of this matters much in stable conditions. When resources are plentiful and the path is clear, almost any organizational design will function. Rigid leaders look fine in easy seasons. The mycorrhizal network is invisible when every tree is thriving independently.
The architecture reveals itself under stress.
When conditions turn, when the mission is challenged, the team fractures, the external pressure becomes severe enough that the easy choices are all bad ones, what determines whether an organization holds or dissolves is whether the code is real. Not whether it was ever articulated. Whether it has been lived, tested, made credible through the evidence of sacrifice.
In the forest, the mycorrhizal network becomes most critical in drought. It is precisely when individual trees cannot sustain themselves that the network's capacity to redistribute resources determines which parts of the forest survive. The trees most deeply connected, whose root systems are most thoroughly integrated into the fungal web, are the ones most likely to make it through - not because they are individually strongest, but because they are most genuinely part of something larger than themselves.
Teams work the same way. The people most likely to hold through genuine organizational stress are not necessarily the most talented or the most senior. They are the ones most deeply connected to the code, who feel the pull of the shared values not as an abstraction but as a real force in their daily choices. They are the ones for whom leaving would mean abandoning something that has become part of who they are.
That connection is built slowly, through repeated exposure to a leader whose code is legible and whose signal is honest. It cannot be manufactured in a crisis, (although a crisis can serve as good re-starting place - to be explored in a future essay). It can only be drawn on, if it has been built.
This is why the daily renewal practice is not just a personal discipline. It is an organizational investment. Every morning a leader consciously recommits to their code, and makes that recommitment visible in the texture of their decisions and the honesty of their communication, they are adding another strand to the network. Another filament of trust that will, someday, carry something important through a moment of stress.
The code does not make the pressure smaller. It makes the organism capable of surviving it.
The first essay in this series ended with a question about the morning.
This one ends with a question about the code.
You already know what can change. The signal is always moving - your style, your approach, your current understanding, yesterday's self dissolving into tomorrow's. That part, if you are doing the work, takes care of itself.
The harder question is, “What cannot?” What strand of you has been conserved through every version of yourself you have lived? What have you never been willing to trade, even when the cost of holding it was real?
Excavate. Find that. Protect it with the same fidelity the nucleus gives to its DNA. Then, let everything else - every signal, every expression, every daily reassembly of the self - be as responsive, as ephemeral, as freely moving as life requires.
You are not coded to stay the same.
You are coded to change, and to know what never does.
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Further Reading
Frankfurt, Harry — The Importance of What We Care About (1988).
Simard, Suzanne — Finding the Mother Tree (2021).
Mukherjee, Siddhartha — The Gene: An Intimate History (2016).
Heifetz, Ronald — Leadership Without Easy Answers (1994).
Wohlleben, Peter — The Hidden Life of Trees (2015).
Edmondson, Amy — The Fearless Organization (2018).
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