This was my entry to the lesswrong essay contest on whether a utilitarian should sign up for cryonics:

A perfect utilitarian living a well-off life would devote themselves to altruism, finding the most effective charitable options and putting their full work towards them. In a utilitarianism for human beings, however, we have to reserve some of our time and money for ourselves, for things we will enjoy, that will revitalize us, and that will keep us going. Instead of considering every single choice in terms of whether it would make you happy enough to justify the expenditure when the opportunity cost is so high, it works well to set a budget. You should give yourself some amount of money to spend on yourself, in whatever way you like best.

Out of your self-spending budget you might buy housing, food, clothes, ice cream, or games. For each of these, you consider how much money you have available, weigh whether the purchase would be worth it, and decide to buy or not. This is the standard approach that is used all over, by utilitarians and not, and it generally works well.

Considering cryonics, which category should we put it in? Is signing up for cryonics spending money as effectively as possible to make the world better, or is it spending to make yourself happier? Could buying cryonics for yourself have enough altruistic benefit to be up there with the most cost-effective charities, or at least be in that range? To get some very rough numbers, GiveWell estimates that the AMF averts a death for each $2500 donated, or under $100 per additional year of life. This may not be the best altruistic option, but it sets a baseline cryonics would need to beat. Neuropreservation costs around $80k, so for it to be more cost effective than giving to the AMF you would need to think it's at least 10% likely give you 8,000 years of additional life. Those numbers are both very high, and keep in mind that we're comparing something very speculative to something much more heavily studied and we should expect less-studied interventions to look worse the more into the details we get.

Cryonics should, however, benefit from being more widely adopted. Both the freezing process and the long-term storage have many inefficiencies that come from being run at very small-scales. Cryonics organizations would be less likely to collapse over time if they were more central to our culture. If more people cared about freezing brains it would be higher status to research it and the technology would likely improve. This would bring down the costs and raise the probability of success. The question is, how much does your signing up do to improve these?

Perhaps if cryonics got up to 10% of the US population then the chances of success would be significantly higher. Linearity seems roughly right here, and the population is 300M, so your signup would bring us one 30 millionth of the way to 10%. This doesn't seem big enough to be a major factor. Similarly, while it's possible existential risks would be taken much more seriously if a substantial fraction of the population expected to live extremely long lives barring catastrophe, your signing up doesn't bring us very far in that direction. Funding for the Future of Humanity institute probably goes much farther.

Even if you do think the benefit of a marginal person signing up is large enough to compete with top charities, it's not clear that marginal person should be you. You should consider whether you could get these same benefits more efficiently through an organization that advocated people sign up for cryonics. With $80k to spend you should be able to get multiple signups, perhaps through running essay contests.

It's also useful to step back, however, and consider how valuable it is to preserve and revive people. If you're a total hedonistic utilitarian, caring about there being as many good lives over all time as possible, deaths averted isn't the real metric. Instead the question is how many lives will there be and how good are they? In a future society with the technology to revive cryonics patients there would still be some kind of resource limits bounding the number of people living or being emulated. Their higher technology would probably allow them to have as many people alive as they chose, within those bounds. If they decided to revive people, this would probably come in place of using those resources to create additional people or run more copies of existing people. This suggests cryonics doesn't actually make there be more people, just changes which people there are. If you're funding cryonics for the most intelligent, conscientious, or creative people then this might be somewhat useful, but the chances that any of us are the best candidate here are low.

(This applies less if you're more of a preference utilitarian, trying to have as many satisfied preferences as possible. Death is generally a major preference violation, and fewer longer lives via cryonics would mean many fewer deaths.)

Even if signing up for cryonics isn't the best thing you can do altruistically, though, that doesn't mean you can't do it. It just should be considered in the self-spending category, compared against things like a nicer house, tastier food, or more travel. In deciding whether to purchase cryonics for yourself the main consideration is how likely it is to work. If you think it has a 20% chance, all things considered, you could probably find $1000/year in your budget for it. At a 0.01% chance, however, it's pretty likely that there's something else which would give you more enjoyment for the money. The cost is high enough that if you're considering cryonics it's definitely worth it for you to put time into getting a good handle on how likely it is. Breaking cryonics down might be helpful here, to help overcome the planning fallacy.

Arguing for Cryo as EA seems to be a bottom line reasoning for me.

I can imagine exceptions. For instance: 1) Mr E.A. is an effective altruist who is super productive and gets most enjoyment out of working, and rests by working even more. Expecting to be an emulation with high likelihood, Mr E. A. decided for cryopreservation to give himself a chance of becoming an emulation coalition which would control large fractions of the EM economy, and use these resources for the EA cause on which society has settled after long and careful thought.

2) Rey Cortzvail is a prominent technologists who fears death more than anything else. He received medals from many presidents, and invented many of the great technologies over the last few decades. To continue working well, it is fundamental for him to think he may get a chance to live a long life, so he signs up for cryonics to purchase peace of mind.

3) Neith Sorez wants to help the world's mess, he wants it badly. He also is not on board with the whole people die thing, and to be fair, much of his perception of how screwed up things are comes from the clarity with which he envisions the grim reaper, and the awful brought by it. He's convinced that AI matters and is pushing through to help AI be less dangerous and quite possibly help most people to get a chance to live long. He wears the necklace though as a reminder, to himself and others, and as a signal of allegiance to the many others who can see the scope of the horror that lies behind us, and the need to stop it from happening towards the future.

4) Miss E.A. has entered the EA community by going to cryonics meetings and noticing that these EA people seem to be pretty freaking awesome, and thinking there's no reason to not join the team, learn all about EA. Within a year, she is very convinced of some particular set of actions and is an active and central EA, all of this came through the cryonics community and her friends there, so she decides to not drop out of cryonics, for historical, signalling, allegiance and friendship reasons.

These above don't seem to me to be bottom line arguments.

But arguments of the form: "The best way to help the far future is to self preserve" through cryonics should definitely be dominated by "Paying for cryonics for whoever is the person you think is doing the best job who isn't yet a cryonicist".

At the risk of necro'ing and old thread, I think we may want to reassess in light of the latest Wait But Why article.

Clearly, at this point cryonics is not an effective way to save a life: costs of up to $250k per life are a far cry from the effectiveness of for example AMF. The moral implications are also not clear: is cryopreserving people morally equivalent to saving people from treatable diseases, for instance? Do we care about aggregate happiness, or suffering? How does cryonics compare to XRisk causes?

There are all very difficult questions, and certainly some of these will have very personalised answers. Still, even for those who consider a successful resuscitation as a result of cryonics of equal or greater value to a life saved by other means (perhaps even if that life then reaches the longevity escape point) it remains matter of basic effectiveness.

I propose that the value of cryonics for EA may be in something beyond its immediate effectiveness: its economy of scale, which relates to its neglectedness. Currently cryonics is a heavily neglected cause; the total number of people signed up in the world don't even measure into the ten thousands. This is unfortunate, because cryonics is an intervention that benefits greatly from improvements in scale; both by reducing costs, and by improving techniques (thereby increasing the probability of success). This article by Alcor suggests that a world scale cryonics network could make saving a life cheaper than even AMF. Of course, these numbers are likely fairly biased in favour of cryonics; nonetheless, we should take note of this possiblity.

Instead of paying for (impactful) people to be frozen (a recurring cryonics proposal in EA), the real value of cryonics as a cause may be to work on its expansion and 'normalisation'. This will be a challenge, and the weirdness associated with cryonics may negatively impact public perception of EA, especially since the most effective intervention may involve attempting to change this public perception. This is definitely something to keep in mind. Moreover, the project may not be worth its resources if anti-aging technologies reach the longevity escape point before cryonics becomes sufficiently 'normal', although it will still have uses in saving people from then-uncurable diseases.

Estimation is rather complicated; the difficulties are reminiscent of XRisk calculations, although cryonics lacks the feature of the destruction of 'a hypothetical overwhelming number of future sentients'; instead it covers only a moderate amount of sentients, scaling inversely with advances in medical technology. Despite this, the effectiveness of 'cryonics normalisation' (for lack of a better term) as a cause may still be worth discussing, simply because of its tremendous potential.

EDIT: A relevant blog post by Robin Hanson discussing both scale and other charitable aspects of cryonics

Important link that hasn't been mentioned yet: http://www.overcomingbias.com/2010/07/cryonics-as-charity.html

The argument is that social reasons are a contributor to people not signing up for or being interested in brain preservation/cryonics, and that doing so yourself helps decrease that.

Epistemic status: low confidence on both parts of this comment.

On life extension research:

See here and here, and be sure to read Owen's comments after clicking on the latter link. It's especially hard to do proper cost effectiveness estimates on SENS, though, because Aubrey de Grey seems quite overconfident (credence-wise) most of the time. SENS is still the best organization I know of that works on anti-aging, though.

On cyonics:

I suspect that most of the expected value from cyonics comes from the outcomes in which cyonics becomes widely enough available that cyonics organizations are able to lower costs (especially storage costs) substantially. Popularity would also help on the legal side of things-- being able to start cooling and perfusion just before legal death could be a huge boon, and earlier cooling is probably the easiest thing that could be done to increase the probability of successful cryonics outcomes in general.

Seems to me that the underlying reasons, beyond the externalities Buck mentioned, are if your personal ethics have some combination of the following four qualities:

• Terminally valuing people not dying, independent of opportunity costs
• Valuing a lifetime of 2n years more than 2 lifetimes of n years
• Valuing oneself more than others at some multiplier (assuming reflective stability)
• Deep, persistent, reflectively stable fear of death

I am like this. I'm pretty sure oge is like this. It seems like there may be some philosophical barriers here. I definitely think that hedonistic utilitarianism violates 1 and 2 outright, and strongly discourages 3 and 4. As a preference utilitarian, the strength of 1 and 4 outweigh the costs to me.

One argument for this position came up while discussing possible permanent societal improvements:

Conversely, maybe having some people from the 20th and 21st centuries could be a long-lasting source of pride and joy for future generations, so some cryonics could be considered a permanent improvement. Similar things could be said about historical artifacts, beautiful natural landmarks, etc.