No Giants Without New Bones

That creak is one of the oldest laws in physics, and almost nobody has noticed that it now applies to them. It says you cannot make a thing much bigger without changing what it is. Not because bigness is bad, but because when a thing grows, some of its parts grow faster than others, and the parts that grow slowest are the parts that hold it up.

A law from a shipyard

Galileo’s last book, the Two New Sciences of 1638, opens in the Venetian arsenal, where the shipwrights knew something the philosophers did not: a large ship needs far heavier props than a small one, or it breaks on the slipway. Galileo worked out why. Make anything k times larger in every direction and its weight, which goes with volume, grows by k cubed. The strength of whatever holds it up, which goes with the area of a cross-section, grows only by k squared. Weight outruns strength. Every doubling doubles the stress on every beam.

He drew the conclusion himself. Nature could not build a giant many times taller than a man unless it changed the proportions of his limbs, thickening the bones until the giant looked like some other animal. Nearly three centuries later the biologist J. B. S. Haldane put the whole idea into one sentence.

A large change in size inevitably carries with it a change of form.

J. B. S. Haldane, On Being the Right Size, 1926

Haldane used a gazelle to show the only ways out. A gazelle that has to become large can make its legs short and thick, like the rhinoceros, or stretch them out at an angle for stability, like the giraffe. What it cannot do is stay a gazelle. And the problem is not only bones. A big animal has too little skin for its bulk, so it folds surface inward: lungs, a coiled gut. Haldane called comparative anatomy largely the story of the struggle to increase surface in proportion to volume. Big animals are more complicated because they are big.

Every company you know is a shape this law chose

Organizations obey the same arithmetic. A company grows by adding people, and people need carrying: managers to coordinate them, meetings to align them, policies, reviews, the people who manage the people who manage. That is the skeleton, and the larger the firm, the more of its body is bone. Then there is the skin, the place where a company actually touches its customers. Bulk grows faster than skin, so large companies fold surface inward the way animals grow lungs. Call centers, account managers and loyalty programs are all organs for recovering the contact a corner shop had for free.

For all of history, one input in this arithmetic held still: the size of a single person. One person’s output was set by one person’s hours. People stayed roughly one size. Only institutions got big.

The person just got bigger

That is the input AI changes. One person with a few good delegates now produces what used to take a department. The size of a person is no longer fixed. And here is what the law says that almost nobody is saying: the bones do not come with the upgrade.

Output is volume. It grows as fast as you add delegates. But everything that output rests on still runs through a cross-section that does not grow at all: your judgment, your name, your attention, the one day in which you can stand behind anything. Every proposal your AI sends carries your signature. Every client it serves is your client. Make yourself ten times bigger in the same shape and each of those carries ten times the load. That is the creak at 6:40 in the morning. It is not stress in the therapist’s sense. It is stress in Galileo’s.

Most people will respond the way the giant in a picture book would: same proportions, just more. Read every draft. Approve every send. Sit in every thread. It works at twice the size. It hurts at four. Somewhere around ten, the thigh breaks. I wrote about the waiting this creates in The Last Line Is You. This is about the weight.

What I expect

1. The first famous AI failures will be people, not machines.

   The collapse everyone talks about will not be a rogue system. It will be a capable person whose output outgrew their judgment and who signed what they never read. Like a broken thigh, it will look sudden, and it will have been arithmetic all along.

2. Approval gives way to the audit.

   Approving every item is bone that has to grow with volume. Sampling, audits and exception reports grow with the cross-section instead. Within a few years, “I check everything personally” will sound like a small operator who has not noticed how big they have become.

3. Your skeleton becomes portable.

   New bones are written: a mandate, a list of standing decisions, a definition of done. They belong to the person, not the employer, and people will carry them from job to job and hand them to their delegates on the first day. It is the reason every business needs a Bring Your Own AI policy: the person’s method travels, and the company’s facts stay.

4. Companies shrink by losing bone, not fat.

   The layers that exist to carry other people thin out first, because delegates need no morale, no reviews and no meetings about meetings. What remains is a different animal: a light frame of written criteria, a few people with enormous reach, and more skin than bulk. The largest firms will be the most changed. I made the management side of this case in Everyone Just Got Promoted.

5. Right-sized becomes a promise.

   Haldane’s first point was that every kind of animal has a most convenient size. Not every person should get as big as the machine allows. Some of the most trusted businesses of the next decade will state their size on purpose: one person, twelve clients, no more. The cap will be the selling point, because the customer will know exactly whose attention they are buying.

I feel this one in my own frame. This site carried more than a dozen new pieces today. I run Charleston AI out of a 3,000-square-foot room where people come to learn what their own AI can do, and the work coming out of my week is the work of a much larger company than me. In September I noticed I had become the queue and told my AI, in plain words, to decide. Since then I have kept the bone down to one sentence: I trust you; only bring me matters worthy of my attention. Everything that is not worthy of me now rests on that sentence instead of on me. It is the thickest bone I have. I wrote about the word for the one who carries it in My AI Delegate, and about what stays with me in The Great Matters.

How this could be wrong

Already true

Anyone working with good delegates already produces far more than their hours used to allow, and already signs their name to more than they can carefully read. The volume has grown. The cross-section has not.

What has to happen

Delegates have to be good enough to work inside written criteria without coming back to ask, and people have to learn to write those criteria, a skill almost nobody was ever taught. The law will not wait for the skill.

Where I am probably wrong

A person is not a body, and the analogy may break exactly there. Bone cannot grow on demand, but checking might. If AI learns to carry the checking itself, verifying its own work and catching its own errors at the same rate it produces, then the cross-section grows with the volume and the old law stops applying to minds. In that world the giant keeps the gazelle’s legs, and I will have described a strain that lasted a few years rather than a law. My bet is that the name on the work is the one part that never scales. That is a bet, not a proof.

Go back to 6:40 in the morning. The list is just as long as it was. The creak is gone, and not because you got smaller. Almost nothing on the list rests on you anymore. You did not become a bigger gazelle. You became a different animal.

Grow the bones first.