Nobody Goes to Space

In July 1969, a White House speechwriter named William Safire wrote a speech that was never delivered. It was for President Nixon, and it opened like this: “Fate has ordained that the men who went to the moon to explore in peace will stay on the moon to rest in peace.”

The plan around it was worked out in detail. Nixon would telephone the widows first. Then a clergyman would commend the men’s souls to the deep, the way it is done at a burial at sea. Then Mission Control would close the line. Two men would suffocate on the surface of another world while the entire planet listened.

The speech went into a drawer. NASA lit the rocket anyway.

We have stopped finding this remarkable, and it is the only part of the Apollo story that matters for what comes next. Armstrong himself said later that he had privately put his chances of getting back to Earth at about ninety percent, and his chances of landing successfully on the first attempt at no better than even. Nobody on that program was confused about the arithmetic. They ran the numbers, they wrote the eulogy, they filed it, and they launched.

The usual explanation for this is character. People were braver then. The culture was harder. Test pilots were a particular breed of person.

I want to offer an explanation that is less flattering and a good deal more useful.

They were cheaper.

Not cheaper as people. Cheaper as assets. The economic value of a human life is not a constant of nature. It is a price. Prices move, and over the next century every force we are excited about is going to push this one in the same direction: up, steeply, and with nothing to stop it.

The frontier will not close because we lack the engines. It will close because we can no longer afford the funeral.

What a life costs

Regulators have to put a number on a life. People find this offensive when they first hear it. Then they think about it for a minute and realize there is no way around it.

Suppose a highway guardrail costs forty million dollars and prevents one death every other year. Somebody has to decide whether to build it. Refusing to name a number does not spare anyone that decision. It just makes the decision worse, and hides who made it.

So the number gets named. It is called the value of a statistical life, and the US Department of Transportation put it at 13.7 million dollars for 2024, up from 9.1 million in 2012. The Department of Health and Human Services uses a figure close to 13 million. The agencies differ, and the number climbs every year.

It is not the value of you. Nobody is claiming that. It is built from what large numbers of ordinary people actually demand, in wages or in cash, before they will accept a small increase in their chance of dying. It comes out of what people do, not out of anyone’s philosophy. Dangerous jobs pay more. Economists measure how much more, and work backward.

Two things about that number deserve more attention than they get. They are usually treated as footnotes. They are actually the whole story.

It goes up with wealth. Richer people demand more money to accept the same danger. This is not a claim about whose life counts. It is simple arithmetic about what a dollar is worth to you. When you have very little, an extra thousand dollars changes your life, and you will accept real risk to get it. When you have a great deal, an extra thousand dollars changes nothing, and the same risk is no longer worth considering. The value of a statistical life is really a measure of how much the world still has left to offer you.

It goes up with time remaining. The standard move here is to convert the lump sum into a value per year of life, by dividing it across the years a person can expect to have left. Do that and you land somewhere in the low hundreds of thousands of dollars per year. Roughly that figure sits behind how most rich countries decide which medical treatments to pay for.

Now run it backward. If a year of life has a price, then a life is worth that price multiplied by the number of years in it.

There is nothing in that equation that stops.

Two bonds and a perpetuity

Here is the same idea in the language of the bond market, where I think it becomes obvious.

Think of a human life as a stream of future years, the way a bond is a stream of future payments. A seventy-year-old is a short bond. A few more payments, then it matures. A healthy twenty-five-year-old today is something like a fifty-year bond. Both are finite. Both eventually stop on their own.

Now cure aging. Not death. Aging.

The person in front of you is no longer a fifty-year bond. They are a perpetual bond, one that never matures and never stops paying.

Anyone who has priced a perpetual bond knows what happens next, and knows it in their hands rather than as a theorem. The thing becomes wildly sensitive to small changes in the inputs. Traders call this duration and convexity. The plain version is easier: when the payments never stop by themselves, the only question that matters is whether something might stop them by accident.

That is the entire valuation. All of it. Every bit of what a perpetuity is worth lives in the chance that it gets interrupted.

Which is why the character explanation of Apollo misses the point. Armstrong was not braver than a person who will live a thousand years. He was shorter dated. He was betting thirty or forty expected years on a coin flip. The thousand-year person is asked to bet a perpetuity on the same coin flip. No amount of courage changes what that trade is worth.

What kills you when nothing else does

It is worth being exact about how long “indefinitely” actually is, because the answer is not forever, and the gap matters enormously.

Human mortality follows a curve that Benjamin Gompertz described in 1825. After about age thirty, your annual chance of dying doubles roughly every eight to ten years, depending on the population you measure. That is the aging term. It is why a healthy sixty-year-old and a healthy thirty-year-old are, statistically, completely different animals. Nearly everything we call medicine is an argument with this one curve.

Sitting underneath it is a second, much flatter risk that has nothing to do with aging at all. Cars. Falls. Fires. Drownings. Violence. Aircraft. This is the rate at which the physical world removes people who were in perfect health that morning. In a wealthy country, for a young adult, it runs somewhere on the order of one in two thousand per year.

Now suppose we win. Suppose the aging term goes to zero and only the background risk is left. Your life expectancy becomes the simple flip of that number. One in two thousand per year gives you something on the order of two thousand years.

I should be clear that this is my own arithmetic rather than a finding I am reporting. It is not a demographic projection and no one has established it. It is one line of division, and I am doing it in front of you precisely so you can see how thin it is. Make cars and medicine safer and the answer climbs. Let the world get more dangerous and it falls fast. The whole estimate rests on a single input that almost nobody thinks about, which is itself the point of the chapter.

But look at what happened to the shape of risk, because this is the part that should stop you.

Today, aging kills you and accidents are a rounding error. In the world we are describing, aging kills nobody and accidents kill everyone. One hundred percent of death becomes accidental.

Every single death is now, in the strict sense, a preventable one. Somebody chose to run that risk, or allowed someone else to run it. No society in history has had to live under that fact. Every workplace fatality, every car crash, every launch failure stops being a tragedy and becomes an accusation. Somebody signed off on that hazard.

You cannot die and get alive again

Now the formal core of the chapter. I will put it as plainly as I can, because everything else rests on it.

You can go broke and get rich again. You cannot die and get alive again.

That asymmetry has a name in probability. Death is an absorbing state. Once the process lands there, no future period exists in which to recover. Every other setback is a detour. This one is a wall.

Anyone who has thought seriously about position sizing knows where this leads. It is the whole content of the Kelly criterion, and of what Ole Peters has more recently formalized under the name ergodicity economics. The idea is this. Imagine a bet with good expected value that also carries a one percent chance of wiping you out. Give that bet to a thousand people once each, and the group does beautifully. Give it to one person a thousand times in a row, and that person is broke with near certainty.

Same bet. Completely different outcome. Averages across a crowd tell you nothing about what happens to a single person playing in sequence, and the difference is entirely caused by the fact that ruin has no exit.

Now apply that to a life with no natural end. Take any fixed yearly chance of dying by accident, however small. Survival over many years means multiplying that small survival chance by itself, over and over. Any number below one, raised to a high enough power, goes to zero.

Over a long enough horizon, ruin is not a risk. It is a certainty with a waiting time.

Which produces a conclusion I find genuinely startling, and which I have not seen stated anywhere in the longevity literature:

Curing aging does not give you immortality. It converts immortality from a biology problem into a risk management problem, and the risk management version is harder.

Biology is a finite opponent. There is a specific list of mechanisms, and in principle each one can be addressed. Accidents are not a finite opponent. They are the open-ended set of ways a physical universe can intersect a fragile body, and driving that to zero is not a research program. It is a religion. The best anyone can do is push the number down, decade after decade, forever, and every further reduction costs more than the last, because you are working through a longer and longer tail of stranger and stranger ways to die.

So the rational policy for a person who does not age is not to live well. It is to reduce the hazard, continuously, at almost any price. Not out of cowardice. The arithmetic simply does not offer another answer. Every unit of risk you accept is no longer a bet against forty remaining years. It is a bet against all of them.

The price of the frontier

Now put the pieces together.

Space is, and will be for a long time, a place with an unavoidably elevated chance of dying. Not because engineering cannot improve, since it improves enormously, but because the floor is set by physics rather than by care. Rockets are controlled explosions. Vacuum does not forgive a single broken part. Radiation accumulates, shielding is heavy, and mass is the constraint on everything. Journeys anywhere interesting take a long time, and if something goes wrong halfway, the options range from poor to none.

Consider the record. The Space Shuttle lost two vehicles and their crews across a hundred and thirty five flights. Call it one and a half percent per flight. NASA’s own final risk assessment put the mean figure at about one in ninety, which is consistent with what actually happened. That was the most sophisticated program the richest country on earth could mount, over thirty years, with the lessons of the first disaster already absorbed.

Now be generous to the future. Suppose the next century does spectacularly well and gets that down to one in ten thousand. Per journey, that is safer than plenty of things people do without a second thought.

For someone with forty years left, one in ten thousand is nothing against the chance to be among the first humans somewhere. It is no worse than a career flying small aircraft, and people take that deal happily.

For someone with two thousand years left, that same one in ten thousand is a bet of about a fifth of a year of expected life. Which sounds small, until you price it. At a few hundred thousand dollars a year, you are already looking at tens of thousands of dollars of risk premium per person per launch, before anything else is counted. And remember that the price of a life-year is not fixed either. It rises with wealth, and this is by construction the wealthiest society that has ever existed. More years, and each year worth more. Multiply those together and the cost does not rise in a straight line. It compounds.

That is only the direct cost. The real closure happens somewhere else, and it happens without anybody deciding it.

Insurers price the tail, and the tail is now enormous. Liability follows the insurance. Regulators follow the liability, and they are already cautious, and they now answer to a public for whom every death is somebody’s fault. Then there is capital, and here I am describing my own trade. The people with balance sheets large enough to fund frontier ventures are precisely the people with the longest personal horizons and the most to lose. They are also, for the first time in history, going to be personally present when the consequences arrive. A hundred-year project is no longer something you hand to your successors. It is something you will still be standing next to when it fails.

Nobody bans space travel. The insurance simply becomes unwritable, and the whole thing quietly dies of underwriting.

So here is the paradox in its final form.

A civilization becomes able to settle the frontier through exactly the same process that makes it unwilling to. The wealth, the medicine and the safety that make the stars thinkable are the wealth, the medicine and the safety that make the cost of reaching them unbearable. Ability and willingness are not two forces in tension. They are one force, running in opposite directions.

Every civilization rich enough to reach the stars is too rich to go.

The wingsuit problem

There is a counterargument to everything above, it is the strongest one available, and this chapter has been walking past it.

The argument says that risk tolerance is not simply a function of remaining life-years, and the evidence is that people with a great deal of life remaining, and a great deal of money, already accept risks far worse than anything a space programme would ask of them.

The numbers are not close. Wingsuit BASE flying kills roughly one participant in every five or six hundred flights. Not per career. Per flight. Climbing Everest has run at somewhere around one percent of climbers over the long record, better in recent years, and a permit alone costs tens of thousands of dollars before a guide is hired. These are not activities of the desperate. They are expensive, they are optional, and the people doing them are disproportionately young, healthy and rich, which is to say they are exactly the population this chapter claims should be least willing to gamble.

Set that against the figure used above. A one in ten thousand chance of dying on a launch is, on the wingsuit numbers, something like twenty times safer than a single flight that people currently queue up and pay to make.

So the model appears to be wrong. Not marginally. By an order of magnitude, in the wrong direction, among precisely the people it makes predictions about.

Take that at full strength before answering it, because a paradox that only survives the weak version of an objection is not worth the pages.

Five answers, and one concession

The first answer is that the wingsuit flyer is not the constraint, and never was.

Consider what a person needs in order to jump off a cliff in a nylon suit. They need the suit, a mountain, and their own consent. There is no underwriter. There is no launch licence. There is no board approving the expenditure, no supply chain, no regulator signing off on a flight readiness review, and no institution that carries liability when it goes wrong. BASE jumping is legal in most places precisely because the entire cost of the failure lands on the person who chose it, and no third party is exposed.

The frontier is not like this and cannot be made like this. Getting to orbit requires capital that somebody has to commit, insurance somebody has to write, launch permission somebody has to grant, and a supply chain of firms each of which carries its own exposure. This chapter’s argument was never that volunteers would run out. It says so explicitly below: frontiers are opened by financing, not by volunteers, and Magellan sailed because a crown could absorb a loss it expected to take. The wingsuit case demonstrates the availability of the volunteer. It says nothing about the availability of the underwriter, which is the thing that was scarce.

The second answer is about scale. There are perhaps a few thousand active wingsuit BASE flyers in the world. That population is sufficient to sustain a sport. It is not sufficient to crew, supply, service and govern a presence on another planet, and the difference is not one of degree. A sport requires that some people are willing. An industry requires that enough people are willing, at a price, repeatedly, with replacements available when they are lost, and with somebody prepared to carry the cost of losing them.

The third answer is that the comparison quietly substitutes the wrong number. The wingsuit flyer is wagering forty or fifty expected years. The person in this chapter’s argument is wagering two thousand. Whether the flyer would still fly with a perpetuity in hand is not something anyone can answer from data, because no such person has ever existed, and it is worth being honest that this is an extrapolation rather than an observation.

What can be observed is the direction of travel. Over the same decades in which healthy life expectancy has extended in wealthy countries, workplace fatality rates have fallen, product safety regulation has ratcheted in one direction, and the value a regulator places on a statistical life has risen year after year. None of that proves the mechanism. All of it is consistent with it, and none of it runs the other way.

The fourth answer is the one that does the most work, and it turns on a distinction the objection erases.

Recall how the value of a statistical life is actually estimated. Economists look at what people demand in wages before they will accept a more dangerous job, and work backwards. Roofers and loggers and deep sea fishermen are paid more than they would be for equivalent work on the ground, and the size of that premium, across many workers and many industries, is what produces the figure.

The essential feature of that measurement is the direction the money flows. The worker is paid to accept the danger. The danger is a cost, borne in exchange for compensation, and the premium is the price at which the exchange clears.

Now look at the wingsuit flyer, and at the Everest client who has written a cheque for the privilege.

They are paying. The money flows the other way.

That is not a smaller version of the same transaction. It is the opposite transaction, and it means the two cases are not measuring the same quantity. Danger accepted for money is a cost of production. Danger purchased with money is a form of consumption, and it is consumed because it is voluntary, self selected, tightly controlled, and above all because it is the point of the activity rather than a by-product of it. Nobody climbs Everest in order to arrive at the summit. The summit is a rock. The risk is the good being bought.

Frontier settlement is production. It is work, done to an objective, by people who would prefer the objective without the hazard and who must be compensated for the difference. The relevant question is therefore not whether anybody will pay to face danger. Plenty will. It is what somebody must be paid to face danger they have no interest in for its own sake, and that number is the one that scales with the years they are wagering.

The wingsuit case, read carefully, does not contradict the value of a statistical life. It sits in a different column of the same ledger.

The history of the last frontier makes the same point in a different way. Early aviation was appallingly dangerous and it attracted exactly the population the objection describes: young, wealthy, willing, famous for it. That population sustained a spectacle for about two decades. It did not produce an airline. Commercial aviation became an industry only after the risk fell by orders of magnitude, at which point the pioneers were irrelevant to it and the business was built by actuaries and engineers on a foundation of statistics rather than nerve. The amateurs did not scale. They were never going to. They demonstrated that the thing was possible, which is valuable and which is not the same as opening it.

The fifth answer is that the objection measures the wrong thing about the people it describes. Someone who flies a wingsuit is not indifferent to death. They are, in the ordinary case, extremely attentive to it: obsessive about equipment, about conditions, about margins. What they have is a high tolerance for a specific, chosen, bounded exposure that they control. That is a different psychological object from an open ended institutional exposure controlled by somebody else, on a schedule set by a launch window, in a vehicle they did not inspect.

Now the concession, which is real and which changes the claim.

If appetite for risk is partly a stable disposition rather than purely a function of years remaining, then a very long lived population will still contain risk seekers, and their number does not fall to zero. It falls as a share, perhaps, but the population is also larger and richer than any before it, and a small share of an enormous number is not a small number. There will be people who want to go.

This damages one version of the argument, and it is worth marking exactly which version. It damages the claim that nobody will be willing. That claim is probably false, and this chapter should not have leaned on it.

What survives is narrower and, on reflection, harder to escape. The institutions that finance, insure and license the frontier are not populated by risk seekers. They are populated by fiduciaries, who are legally obliged to act for beneficiaries, and whose beneficiaries are the longest lived and most loss averse population in history. A pension fund does not develop a taste for danger because one of its members has one. An insurer does not write a policy it cannot price because the applicant is enthusiastic.

So the claim should be stated this way, and it is the form the rest of this chapter will use. It is not that nobody goes. It is that the willing become uncoupled from the capital, and that the frontier closes at the point where the two can no longer be brought together on any terms either side will accept.

Which is a considerably more specific prediction, and a more falsifiable one. It says the constraint will show up first in the insurance and liability layer rather than in recruitment. It says the volunteers will still be there, and visible, and quoted in the press, and unable to raise the money.

It also says where to look for the argument being wrong. If a serious frontier programme is ever financed by an institution whose beneficiaries are long lived, at a risk level comparable to the early Shuttle, then the mechanism described here is not operating and this chapter should be discarded. That is a real test, it can be run, and nothing in the argument is protected from it.

Four more objections

Those are not the only replies worth taking seriously, and the remaining ones are quicker.

It only takes a few volunteers. True, and beside the point. Frontier settlement has never been short of willing bodies. What it runs short of is capital, insurance, launch licenses, supply chains and legal cover, all of which sit with people who want nothing to do with the tail. Frontiers are opened by financing, not by volunteers. Magellan’s expedition left in 1519 with five ships and around two hundred and seventy men. One ship and eighteen men came home three years later. The reason it sailed at all is that the Spanish crown could absorb a loss it fully expected to take. The volunteers were never the constraint. The underwriter was.

Backups and copies dissolve the problem. This is the serious objection, and I think it is correct, for anything that can actually be copied. If what you are can be duplicated and stored, then death stops being a wall and becomes an expensive inconvenience, and everything I have argued collapses. Notice exactly what that concedes. The frontier reopens only for things that can be copied. Which is not us. That takes me directly into the next chapter.

Machines will go instead. Yes. That is my argument, not a refutation of it. Robotic and artificial explorers are the obvious answer to an intolerable death rate, and they will do the work. But we should be clear about what follows. Whoever bears the risk is whoever establishes a presence, and presence, historically, is what turns into ownership. The frontier will be settled by whatever can afford to die out there. It will be owned by whatever settles it. Whether those remain the same thing is the political question of the next two centuries.

The old and the sick will still go. They will. And this is the objection that turns the argument rather than defeating it.

The mortal inherit the stars

If willingness to take a risk depends on how much life you are wagering, then the frontier does not close for everyone. It closes for the long-lived, and it opens for everyone else.

Whoever has less to lose goes.

That includes the poor, in any world where longevity treatment is expensive or rationed. It includes the artificial, whose lifespans are a design choice. And it includes, most interestingly, the people who look at two thousand years of careful risk avoidance, at an entire existence organized around not dying, and decide they would rather have a short life that goes somewhere.

That is not a fringe position. It may turn out to be the most consequential decision available to a human being in the next century, because it decides who holds the frontier. And whoever holds the frontier eventually holds everything else.

We have been carrying an assumption for a long time, through every space program and every science fiction novel and every argument about why the species should not keep all its eggs in one atmosphere. The assumption is that the future belongs to the people who last.

I think it is exactly backward.

Longevity buys you Earth. The stars go to whoever is still willing to die.