The Emergency Exit from Mortality

Diego’s worldview on cryonics and preservation

This room contains an emergency exit, a filing cabinet, and a surprisingly important wallet.

The wallet enters the story in August 2026. Diego lost it; strangers found it, passed it along, and worked out how to contact him. The successful clue was his cryonics card. An object intended to help people preserve its owner after a catastrophe had located its owner after a lesser catastrophe. His published account observed:

The cryonics card successfully completed its first resurrection. It brought back my wallet.¹

For the moment, this is the resurrection with a receipt.

The episode is funny because the grand ambition and the mundane mechanism are so close together. It is also a good entrance to Diego's view of preservation. An intention inside your head needs connections outside your head if other people are ever going to act on it. Survival can depend on a card, a telephone call, a person who cares, or someone having filled in the paperwork before the emergency.

A chance that survives the interruption

Diego has repeatedly described himself as the first Brazilian to sign up for cryonics. It belongs to the early architecture of his adult life, before the later political arguments and long before AI assistants began cataloguing his intellectual furniture. In a 2020 reflection on time, he described cryonics as:

basically a low probability bet of extending time.²

The wording puts the idea in its proper place. He does not need to think that restoration is assured in order to prefer keeping a possibility open. He compares preservation with alternatives that destroy the thing he hopes can eventually be restored. His occasional reminders to friends make the comparison with his usual delicacy:

This is your very rare periodic reminder that being cryogenically frozen is strictly better than the alternative of being eaten by worms or becoming dust, and you should sign up for cryonics basically as soon as you have the disposable funds for it.³

The worms have not, in his view, submitted a competitive proposal.

Cryonics is one part of a larger survival strategy. If a person stays alive until powerful rejuvenation becomes available, wonderful. If the body fails before then, preservation is an attempted bridge across the gap. Future capabilities might be able to do something present capabilities cannot. The objective is to prevent the failure of today's medicine from automatically closing every future door.

That same outlook can survive a bleak forecast. In December 2022, Diego wrote that he expected permanent death and assigned only a small chance to restoration through cryonics. He nevertheless intended to retain his precautions. The available bet did not cease to matter because he had become pessimistic about winning it.⁴

This is why describing him simply as a believer misses the working distinction. There is his desire to continue, his changing expectation of success, and the action he takes while success remains possible. They need not all have the same temperature.

Revival must include the person who wanted it

The next door in this room is locked with a philosophical question: what has to survive for the person to survive?

Diego's purpose is not satisfied by a future historian producing an exceptionally accurate account of him. Nor does he automatically treat a machine with his memories and mannerisms as the fulfillment of his wish to remain alive. His study of consciousness and personal identity grew partly out of wanting to know what kinds of technological continuation would actually count as his continuation.

The preference becomes very concrete in My Opinions About Death:

When I am cryopreserved, I would prefer to be brought back in my biological original form, just defrosted, and not destructively uploaded.⁵

In the same paragraph he states his concern directly:

I am somewhat confident that destructive uploading causes death⁵

These are Diego's own distinctions, built into his preservation preferences. Saving a description of the castle and saving its inhabitant are different ambitions. He can be delighted by a model of his mind without treating the model's existence as proof that he personally has escaped destruction.

The more detailed identity argument belongs in the Castle's room on personal identity. Its practical consequence here is that preservation has to be evaluated against the kind of continuation he wants. The frozen biological person, an uploaded reconstruction, an archive of writings, and a remembered life cannot simply be placed under one reassuring heading and declared equivalent.

He also distinguishes interruption from irreversible loss. In a November 2025 comment, he argued that a recoverable person retains identity through an absence of present activity, drawing an analogy with dreamless sleep or fainting. The decisive question for him is whether the person can return in the relevant sense.⁶

The point of the emergency exit is to carry its occupant through.

The laboratory needs a booking desk

One of his most revealing longevity essays has a rather unglamorous protagonist: a tissue sample.

In An Alarming Fact About the Anti-Aging Community (2015), Diego described wanting to freeze some of his own cells while they were younger. He connected cell banking with the possibility of future regenerative uses and, in the essay's argument, with organ-engineering work already being done. What interested him was the possibility of taking a concrete preparatory step now. He expected people immersed in longevity to have investigated it and to be able to point him toward their experience.

Instead, he reported asking researchers, wealthy enthusiasts, cryonicists, and other people concerned with aging without finding the example he sought:

I've asked them all, and I have nothing to show for it.⁷

His exasperation was directed at the distance between discussing a technology and becoming a user of it. Someone could devote a working life to defeating aging, absorb the relevant information, and still fail to convert an apparently useful option into an appointment. The problem he wanted solved was:

getting them to take information from the world of science and biomedicine and applying it to themselves. To become users of the technology they are boasters of.⁷

He was not exempting himself from the difficulty. The inquiry began because he wanted help doing it. His essay did not announce that he had resolved the general behavioral problem; it asked how the community could become better at making its stated ambitions govern its actions.

This is a characteristic Diego frustration. The future has magnificent illustrations. Where is the booking desk?

His proposed Rational Immortalist Sequence in 2013 had taken the same practical direction. Assume that someone wants a very long life worth living. What follows for daily decisions? He separated obtaining personal access to future resources from helping the relevant technologies arrive sooner. He wanted case studies of actual people, attention to age and opportunities, and incentives that repeatedly brought the goal back into view.⁸

He also wanted to examine ways that apparently promising plans could fail. A preservation facility might be destroyed. A global catastrophe might remove the future that was supposed to perform the rescue. An upload might fail to retain what matters. These questions belonged inside the plan, because an indispensable broken link defeats all the other links, however impressive they look individually.

Your friends should not have to invent the exit overnight

The institutional side was visible early. In June 2012, Diego followed a Brazilian case involving a family's effort to send a relative's body to the Cryonics Institute. He posted about the dispute, interviews prompted by his own membership, and then the legal authorization for transport. What mattered to him was the ability to carry out the person's wishes across a real institutional boundary.⁹

A more personal emergency made that practical lesson sharper. In later public accounts, Diego described a crisis in 2015 when a friend became gravely ill without having completed cryonics arrangements. He and others tried to assemble what might be required if the friend died. This meant contacting people, raising resources, locating signatures, and negotiating practical obstacles while time was short.

In his 2026 retrospective, he described the work in a compact sentence:

And to war we went. Calling family, gathering resources for cryopreservation, figuring out signatures and papers.¹⁰

The work was contingency planning: make preservation possible if it became necessary. It shows what his belief in keeping someone around demanded when another person's future might depend on immediate effort.

His 2022 recollection turned that experience into a practical plea:

Sign up for cryonics once you can afford it, save your friends the hassle.¹¹

He added:

You may not be lucky enough to have people ready to help you out.¹¹

Behind the breezy word hassle are days he remembered as exceptionally tense. The broader structure is simple: a private preference cannot perform its own rescue. Other people and institutions need to know what it is and be in a position to act on it. Preparing beforehand is one way of caring for the people who would otherwise inherit the emergency along with their grief.

Two beloved causes do not automatically become one

Cryonics occupies an unusual place in his altruism. Diego wants to live; he also wants to do good for others. He does not assume that the strongest argument for spending on his own preservation is therefore an Effective Altruist argument.

In a 2017 discussion of the attempted merger, he wrote:

As far as I can tell, there are literally zero things I care about more than living forever, on the one hand, and Effective Altruism on the other hand.

But that doesn't mean I can put those hands together, that would be intellectually dishonest in my (who am I kidding - unhumble) opinion.¹²

He separated personal prudence from the question of where altruistic resources would accomplish the most. The conclusion he wanted for himself did not settle that second comparison. In related discussion, he considered special cases in which preservation might help altruistic work, including the continuity of unusually productive people and the community connections that bring people into useful projects.¹³

His own valuation of identity supplies another route. In a follow-up comment, he explained that his former Facebook name's abbreviation VICH stood for valuing identity, complexity, and happiness. Preserving a particular person has a place in his ethics that cannot be reduced to producing an equivalent quantity of anonymous future happiness. Yet he also thought cryonics and EA could accomplish more when pursued separately than when forced to compete for the same attention.¹⁴

That separation appears in his media history too. A proposed documentary about his wish to live forever, and later television interviews, made cryonics a highly visible part of his public identity. His 2014 essay on those encounters described trying to use the attention as a bridge to transhumanism and altruism. He did not want the entire person compressed into the eccentricity that made good television.¹⁵

He has other rooms. A tour should continue into them.

Instructions for whoever opens the door

In 2009, the anticipated cryonics contract was bound up with an adventurous speculation about many worlds and waking in a posthuman future. That essay's particular scenario belongs to the young Diego who wrote it. But its emotional mixture remains familiar: eagerness for extraordinary possibilities, affection for the present world, and the bodily shock of contemplating a passage into the unknown.¹⁶

Later writing gives the destination a more domestic touch. In 2023, responding to a vision of a place he wanted to inhabit, he left this instruction:

Dear Superintelligence that revives my cryopreserved body: This is where I would like to live, just make the animals also be scientists and philosophers. Eternity would go by in a minute if this could be mine.¹⁷

The ambition is not simply to retain a functioning organism indefinitely. It is to resume a life with places worth inhabiting, minds worth meeting, and further experiences worth having. Preferably the animals can participate in the conversation.

For now, a card sits in a wallet. The plan reaches toward a distant technological future through ordinary acts of identification, preparation, and care. Diego wants those acts connected well enough that, when one version of the world can no longer keep him, a later one might still get the chance.

Further doors

Read An Alarming Fact About the Anti-Aging Community (2015) for the gap between intention and action; the proposed Rational Immortalist Sequence (2013) for the strategic framework; My Opinions About Death (2023) for his preferred kind of restoration; the September 2022 cryonics reminder for the social burden of emergency preparation; and People Are Altruistic (2026) for the wallet's unexpected return from the beyond.

Continue: What Paradise Is For