This essay was first published as a chapter in my book Effective Altruism: How Can We Best Help Others? which is available for free download here. The chapter that precedes it makes a general case for suffering-focused ethics, whereas this chapter argues for a particular suffering-focused view.
The ethical view I would advocate most strongly is a suffering-focused view that centers on a core principle of Sympathy for Intense Suffering, or SIS for short, which roughly holds that we should prioritize the interests of those who are, or will be, in a state of extreme suffering. In particular: that we should prioritize their interest in avoiding such suffering higher than anything else.
One can say that this view takes its point of departure in classical utilitarianism, the theory that we should maximize the net sum of happiness minus suffering. Yet it questions a tacit assumption, a particular existence claim, often held in conjunction with the classical utilitarian framework, namely that for every instance of suffering, there exists some amount of happiness that can outweigh it.
This is a deeply problematic assumption, in my view. More than that, it is peculiar that classical utilitarianism seems widely believed to entail this assumption, given that (to my knowledge) none of the seminal classical utilitarians — Jeremy Bentham, John Stuart Mill, and Henry Sidgwick — ever argued for this existence claim, or even discussed it. Thus, it seems that the acceptance of this assumption is no more entailed by classical utilitarianism, defined as the ethical view, or views, expressed by these utilitarian philosophers, than is its rejection.
The question of whether this assumption is reasonable ties into a deeper discussion about how to measure and weigh happiness and suffering against each other, and I think this is much less well-defined than is commonly supposed (even though the trickiness of the task is often acknowledged). The problem is that we have a common sense view that goes something like the following: if a conscious subject deems some state of suffering worth experiencing in order to attain some given pleasure, then this pleasure is worth the suffering. And this common sense view may work for most of us most of the time. Yet it runs into problems in cases where the subject deems their suffering so unbearable that no amount of happiness could ever outweigh it.
For what would the common sense view say in such a situation? That the suffering indeed cannot be outweighed by any pleasure? That would seem an intuitive suggestion, yet the problem is that we can also imagine the case of an experience of some pleasure that the subject, in that experience-moment, deems so great that it can outweigh even the worst forms of suffering, which leaves us with mutually incompatible value claims (although it is worth noting that one can reasonably doubt the existence of such positive states, whereas, as we shall see below, the existence of correspondingly negative experiences is a certainty). How are we to evaluate these claims?
The aforementioned common sense method of evaluation has clearly broken down at this point, and is entirely silent on the matter. We are forced to appeal to another principle of evaluation. And the principle I would argue we should employ is, as hinted above, to choose to sympathize with those who are worst off — those who are experiencing intense suffering. Hence the principle of sympathy for intense suffering: we should sympathize with, and prioritize, the evaluations of those subjects who deem their suffering unoutweighable, even if only for a brief experience-moment, and thus give total priority to helping these subjects. More precisely, we should minimize the amount of such experience-moments of extreme suffering. That, on this account of value, is the greatest help we can do for others.
This principle actually seems to have a lot of support from common sense and “common wisdom”. For example, imagine two children are offered to ride a roller coaster, one of whom would find the ride very pleasant, while the other child would find it very unpleasant, and imagine, furthermore, that the only two options available are that they either both ride or neither of them ride (and if neither of them ride, they are both perfectly fine). Whose interests should we sympathize with and favor? Common sense would appear to favor the child who would not want to take the ride. The mere pleasure of the “ride-positive” child does not justify a violation of the interest of the other child not to suffer a very unpleasant experience. The interest in not enduring such suffering seems far more fundamental, and hence to have ethical primacy, compared to the relatively trivial and frivolous interest of having a very pleasant experience.
Arguably, common sense even suggests the same in the case where there are many more children who would find the ride very pleasant, while still only one child who would find it very unpleasant (provided, again, that the children will all be perfectly fine if they do not ride). Indeed, I believe a significant fraction of people would say the same no matter how many such “ride-positive” children we put on the scale: it would still be wrong to give them the ride at the cost of forcing the “ride-negative” child to undergo the very unpleasant experience.
And yet the suffering in this example — a very unpleasant experience on a roller coaster — can hardly be said to count as remotely extreme, much less an instance of the worst forms of suffering; the forms of suffering that constitute the strongest, and in my view overwhelming, case for the principle of sympathy for intense suffering. Such intense suffering, even if balanced against the most intense forms of pleasure imaginable, only demands even stronger relative sympathy and priority. However bad we may consider the imposition of a very unpleasant experience for the sake of a very pleasant one, the imposition of extreme suffering for the sake of extreme pleasure must be deemed far worse.
The Horrendous Support for SIS
The worst forms of suffering are so terrible that merely thinking about them for a brief moment can leave the average sympathetic person in a state of horror and darkness for a good while, and therefore, quite naturally, we strongly prefer not to contemplate these things. Yet if we are to make sure that we have our priorities right, and that our views about what matters most in this world are as well-considered as possible, then we cannot shy away from the task of contemplating and trying to appreciate the disvalue of these worst of horrors. This is no easy task, and not just because we are reluctant to think about the issue in the first place, but also because it is difficult to gain anything close to a true appreciation of the reality in question. As David Pearce put it:
It’s easy to convince oneself that things can’t really be that bad, that the horror invoked is being overblown, that what is going on elsewhere in space-time is somehow less real than this here-and-now, or that the good in the world somehow offsets the bad. Yet however vividly one thinks one can imagine what agony, torture or suicidal despair must be like, the reality is inconceivably worse. Hazy images of Orwell’s ‘Room 101’ barely hint at what I’m talking about. The force of ‘inconceivably’ is itself largely inconceivable here.
Nonetheless, we can still gain at least some, admittedly rather limited, appreciation by considering some real-world examples of extreme suffering (what follows are examples of an extremely unpleasant character that may be triggering and traumatizing).
One such example is the tragic fate of the Japanese girl Junko Furuta who was kidnapped in 1988, at the age of 16, by four teenage boys. According to their own trial statements, the boys raped her hundreds of times; “inserted foreign objects, such as iron bars, scissors and skewers into her vagina and anus, rendering her unable to defecate and urinate properly”; “beat her several times with golf clubs, bamboo sticks and iron rods”; “used her as a punching bag by hanging her body from the ceiling”; “dropped barbells onto her stomach several times”; “set fireworks into her anus, vagina, mouth and ear”; “burnt her vagina and clitoris with cigarettes and lighters”; “tore off her left nipple with pliers”; and more. Eventually, she was no longer able to move from the ground, and she repeatedly begged the boys to kill her, which they eventually did, after 44 days.
An example of extreme suffering that is much more common, indeed something that happens countless times every single day, is being eaten alive, a process that can sometimes last several hours with the victim still fully conscious of being devoured, muscle by muscle, organ by organ. A harrowing example of such a death that was caught on camera (see the following note) involved a baboon tearing apart the hind legs of a baby gazelle and eating this poor individual who remained conscious for longer than one would have thought and hoped possible. A few minutes of a much more protracted such painful and horrifying death can be seen via the link in the following note (lions eating a baby elephant alive). And a similar, yet quicker death of a man can be seen via the link in the following note. Tragically, the man’s wife and two children were sitting in a car next to him while it happened, yet they were unable to help him, and knowing this probably made the man’s experience even more horrible, which ties into a point made by Simon Knutsson:
Sometimes when the badness or moral importance of torture is discussed, it is described in terms of different stimuli that cause tissue damage, such as burning, cutting or stretching. But one should also remember different ways to make someone feel bad, and different kinds of bad feelings, which can be combined to make one’s overall experience even more terrible. It is arguably the overall unpleasantness of one’s experience that matters most in this context.
After giving a real-world example with several layers of extreme cruelty and suffering combined, Knutsson goes on to write:
Although this example is terrible, one can imagine how it could be worse if more types of violence and bad feelings were added to the mix. To take another example: [Brian] Tomasik often talks about the Brazen bull as a particularly bad form of torture. The victim is locked inside a metal bull, a fire is lit underneath the bull and the victim is fried to death. It is easy to imagine how this can be made worse. For example, inject the victim with chemicals that amplify pain and block the body’s natural pain inhibitors, and put her loved ones in the bull so that when she is being fried, she also sees her loved ones being fried. One can imagine further combinations that make it even worse. Talking only of stimuli such as burning almost trivializes how bad experiences can be.
Another example of extreme suffering is what happened to Dax Cowart. In 1973, at the age of 25, Dax went on a trip with his father to visit land that he considered buying. Unfortunately, due to a pipeline leak, the air over the land was filled with propane gas, which is highly flammable when combined with oxygen. As they started their car, the propane ignited, and the two men found themselves in a burning inferno. Dax’s father died, and Dax himself had much of his hands, eyes, and ears burned away; two thirds of his skin was severely burned.
The case of Dax has since become quite famous, not only, or even mainly, because of the extreme horror he experienced during this explosion, but because of the ethical issues raised by his treatment, which turned out to be about as torturous as the explosion itself. For Dax himself repeatedly said, immediately after the explosion as well as for months later, that he wanted to die more than anything else, and that he did not want to be subjected to any treatment that would keep him alive. Nonetheless, he was forcibly treated for a period of ten months, during which he tried to take his life several times.
Since then, Dax has managed to recover and live what he considers a happy life — he successfully sued the oil company responsible for the pipeline leak, which left him financially secure; he earned a law degree; and got married. Yet even so, he still wishes that he had been killed rather than treated. In Dax’s own view, no happiness could ever compensate for what he went through.
This kind of evaluation is exactly what the ethical principle advocated here centers on, and what the principle amounts to is simply a refusal to claim that Dax’s evaluation, or any other like it, is wrong. It maintains that we should not allow the occurrence of such extreme horrors for the sake of any intrinsic good, and hence that we should prioritize alleviating and preventing them over anything else.
One may object that the examples above do not all comprise clear cases where the suffering subject deems their suffering so bad that nothing could ever outweigh it. And more generally, one may object that there can exist intense suffering that is not necessarily deemed so bad that nothing could outweigh it, either because the subject is not able to make such an evaluation, or because the subject just chooses not to evaluate it that way. What would the principle of sympathy for intense suffering say about such cases? It would say the following: in cases where the suffering is intense, yet the sufferers choose not to deem it so bad that nothing could outweigh it (we may call this “red suffering”), we should prioritize reducing suffering of the kind that would be deemed unoutweighable (what we may call “black suffering”). And in cases where the sufferers cannot make such evaluations, we may say that suffering at a level of intensity comparable to the suffering deemed unoutweighable by subjects who can make such evaluations should also be considered unoutweighable, and its prevention should be prioritized over all less intense forms of suffering.
Yet this is, of course, all rather theoretical. In practice, even when subjects do have the ability to evaluate their experience, we will, as outside observers, usually not be able to know what their evaluation is — for instance, how someone who is burning alive might evaluate their experience. In practice, all we can do is make informed assessments of what counts as suffering so intense that such an evaluation of unoutweighability would likely be made by the sufferer, assuming an idealized situation where the sufferer is able to evaluate the disvalue of the experience.
I shall spare the reader from further examples of extreme suffering here in the text, and instead refer to sources, found in the following note, that contain additional cases that are worth considering in order to gain a greater appreciation of extreme suffering and its disvalue. And the crucial question we must ask ourselves in relation to these examples — which, as hinted by the quote above by Knutsson, are probably far from the worst possible manifestations of suffering — is whether the creation of happiness or any other intrinsic good could ever justify the creation, or the failure to prevent, suffering this bad and worse. If not, this implies that our priority should not be to create happiness or other intrinsic goods, but instead to prevent extreme suffering of this kind above anything else, regardless of where in time and space it may risk emerging.
Objections to SIS
Among the objections against this view I can think of, the strongest, at least at first sight, is the sentiment: but what about that which is most precious in your life? What about the person who is most dear to you? If anything stands a chance of outweighing the disvalue of extreme suffering, surely this is it. In more specific terms: does it not seem plausible to claim that, say, saving the most precious person in one’s life could be worth an instance of the very worst form of suffering?
Yet one has to be careful about how this question is construed. If what we mean by “saving” is that we save them from extreme suffering, then we are measuring extreme suffering against extreme suffering, and hence we have not pointed to a rival candidate for outweighing the superlative disvalue of extreme suffering. Therefore, if we are to point to such a candidate, “saving” must here mean something that does not itself involve extreme suffering, and, if we wish to claim that there is something wholly different from the reduction of suffering that can be put on the scale, it should preferably involve no suffering at all. So the choice we should consider is rather one between 1) the mixed bargain of an instance of the very worst form of suffering, i.e. black suffering, and the continued existence of the most precious person one knows, or 2) the painless discontinuation of the existence of this person, yet without any ensuing suffering for others or oneself.
Now, when phrased in this way, choosing 1) may not sound all that bad to us, especially if we do not know the one who will suffer. Yet this would be cheating — nothing but an appeal to our faulty and all too partial moral intuitions. It clearly betrays the principle of impartiality, according to which it should not matter whom the suffering in question is imposed upon; it should be considered equally disvaluable regardless. Thus, we may equivalently phrase the choice above as being between 1) the continued existence of the most precious person one knows of, yet at the price that this being has to experience a state of extreme suffering, a state this person deems so bad that, according to them, it could never be outweighed by any intrinsic good, or 2) the discontinuation of the existence of this being without any ensuing suffering. When phrased in this way, it actually seems clearer to me than ever that 2) is the superior choice, and that we should adopt the principle of sympathy for intense suffering as our highest ethical principle. For how could one possibly justify imposing such extreme, and in the mind of the subject unoutweighable, suffering upon the most precious person one knows, suffering that this person would, at least in that moment, rather die than continue to experience? In this way, for me at least, it is no overstatement to say that this objection against the principle of sympathy for intense suffering, when considered more carefully, actually ends up being one of the strongest cases for it.
Another seemingly compelling objection would be to question whether an arbitrarily long duration of intense, yet, according to the subject, not unoutweighable suffering, i.e. red suffering, is really less bad than even just a split second of suffering that is deemed unoutweighable, i.e. black suffering. Counter-intuitively, my response, at least in this theoretical case, would be to bite the bullet and say “yes”. After all, if we take the subject’s own reports as the highest arbiter of the (dis)value of experiential states, then the black suffering cannot be outweighed by anything, whereas the red suffering can. Also, it should be noted that this thought experiment likely conflicts with quite a few sensible, real-world intuitions we have. For instance, in the real world, it seems highly likely that a subject who experiences extreme suffering for a long time will eventually find it unbearable, and say that nothing can outweigh it, contrary to the hypothetical case we are considering. Another such confounding real-world intuition might be one that reminds us that most things in the real world tend to fluctuate in some way, and hence, intuitively, it seems like there is a significant risk that a person who endures red suffering for a long time will also experience black suffering (again contrary to the actual conditions of the thought experiment), and perhaps even experience a lot of it, in which case this indeed is worse than a mere split second of black suffering on any account.
Partly for this latter reason, my response would also be different in practice. For again, in the real world, we are never able to determine the full consequences of our actions, and nor are we usually able to determine from the outside whether someone is experiencing red or black suffering, which implies that we have to take uncertainty and risks into account. Also because, even if we did know that a subject deemed some state of suffering as “merely” red at one point, this would not imply that their suffering at other moments where they appear to be in a similar state will also be deemed red as opposed to black. For in the real world it is indeed to be expected that significant fluctuations will occur, as well as that “the same suffering”, in one sense at least, will be felt as worse over time. Indeed, if the suffering is extreme, it all but surely will be deemed unbearable eventually.
Thus, in the real world, any large amount of extreme suffering is likely to include black suffering too, and therefore, regardless of whether we think some black suffering is worse than any amount of red suffering, the only reasonable thing to do in practice is to avoid getting near the abyss altogether.
Bias Alert: We Prefer to Not Think About Extreme Suffering
As noted above, merely thinking about extreme suffering can evoke unpleasant feelings that we naturally prefer to avoid. And this is significant for at least two reasons. First, it suggests that thinking deeply about extreme suffering might put our mental health at risk, and hence that we have good reason, and a strong personal incentive, to avoid engaging in such deeper thinking. Second, in part for this first reason, it suggests that we are biased against thinking deeply about extreme suffering, and hence biased against properly appreciating the true horror and disvalue of such suffering. Somewhat paradoxically, (the mere thought of) the horror of extreme suffering keeps us from fully appreciating the true scope of this horror. And this latter consideration is significant in the context of trying to fairly evaluate the plausibility of views that say we should give special priority to such suffering, including the view presented above.
Indeed, one can readily tell a rather plausible story about how many of the well-documented biases we reviewed previously might conspire to produce such a bias against appreciating the horror of suffering. For one, we have wishful thinking, our tendency to believe as true what we wish were true, which in this case likely pulls us toward the belief that it can’t be that bad, and that, surely, there must be something of greater value, some grander quest worth pursuing in this world than the mere negative, rather anti-climatic “journey” of alleviating and preventing extreme suffering. Like most inhabitants of Omelas, we wishfully avoid giving much thought to the bad parts, and instead focus on all the good — although our sin is, of course, much greater than theirs, as the bad parts in the real world are indescribably worse on every metric, including total amount, relative proportions, and intensity.
To defend this wishfully established view, we then have our confirmation bias. We comfortably believe that it cannot really be that bad, and so in perfect confirmation bias textbook-style, we shy away from and ignore data that might suggest otherwise. We choose not to look at the horrible real-world examples that might change our minds, and to not think too deeply about the arguments that challenge our merry conceptions of value and ethics. All of this for extremely good reasons, of course. Or at least so we tell ourselves.
Next, we have groupthink and, more generally, our tendency to conform to our peers. Others do not seem to believe that extreme suffering is that horrible, or that reducing it should be our supreme goal, and thus our bias to conform smoothly points us in the same direction as our wishful thinking and confirmation bias. That direction being: “Come on, lighten up! Extreme suffering is probably not that bad, and it probably can be outweighed somehow. This is what I want to believe, it is what my own established and comfortable belief says, and it is what virtually all my peers seem to believe. Why in the world, then, would I believe anything else?”
Telling such a story of bias might be considered an unfair move, a crude exercise in pointing fingers at others and exclaiming “You’re just biased!”, and admittedly it is to some extent. Nonetheless, I think two things are worth noting in response to such a sentiment. First, rather than having its origin in finger pointing at others, the source of this story is really autobiographical: it is a fair characterization of how my own mind managed to repudiate the immense horror and primacy of extreme suffering for a long time. And merely combining this with the belief that I am not a special case then tentatively suggests that a similar story might well apply to the minds of others too.
Second, it should be noted that a similar story cannot readily be told in the opposite direction — about the values defended here. In terms of wishful thinking, it is not particularly wishful or feel-good to say that extreme suffering is immensely bad, and that there is nothing of greater value in the world than to prevent it. That is not a pretty or satisfying story for anyone. The view also seems difficult to explain via an appeal to confirmation bias, since many of those who hold this view of extreme suffering, including myself, did not hold it from the outset, but instead changed their minds toward it upon considering arguments and real-world examples that support it. The same holds true of our tendency to conform to our peers. For although virtually nobody appears to seriously doubt that suffering has disvalue, the view that nothing could be more important than preventing extreme suffering does not seem widely held, much less widely expressed. It lies far from the narrative about the ultimate mission and future purpose of humanity that prevails in most circles, which runs more along the lines of “Surely it must all be worth it somehow, right?”
This last consideration about how we stand in relation to our peers is perhaps especially significant. For the truth is that we are a signalling species: we like to appear cool and impressive. And to express the view that nothing matters more than the prevention of extreme suffering seems a most unpromising way of doing so. It has a strong air of darkness and depression about it, and, worst of all, it is not a signal of strength and success, which is perhaps what we are driven the most to signal to others, prospective friends and mates alike. Such success signalling is not best done with darkness, but with light: by exuding happiness, joy, and positivity. This is the image of ourselves, including our worldview, that we are naturally inclined to project, which then ties into the remark made above — that this view does not seem widely held, “much less widely expressed”. For even if we are inclined to hold this view, we appear motivated to not express it, lest we appear like a sad loser.
In sum, by my lights, effective altruism proper is equivalent to effectively reducing extreme suffering. This, I would argue, is the highest meaning of “improving the world” and “benefiting others”, and hence what should be considered the ultimate goal of effective altruism. The principle of sympathy for intense suffering argued for here stems neither from depression, nor resentment, nor hatred. Rather, it simply stems, as the name implies, from a deep sympathy for intense suffering. It stems from a firm choice to side with the evaluations of those who are superlatively worst off, and from this choice follows a principled unwillingness to allow the creation of such suffering for the sake of any amount of happiness or any other intrinsic good. And while it is true that this principle has the implication that it would have been better if the world had never existed, I think the fault here is to be found in the world, not the principle.
Most tragically, some pockets of the universe are in a state of insufferable darkness — a state of black suffering. In my view, such suffering is like a black hole that sucks all light out of the world. Or rather: the intrinsic value of all the light of the world pales in comparison to the disvalue of this darkness. Yet, by extension, this also implies that there is a form of light whose value does compare to this darkness, and that is the kind of light we should aspire to become, namely the light that brightens and prevents this darkness. We shall delve into how this can best be done shortly, but first we shall delve into another issue: our indefensibly anthropocentric take on altruism and “philanthropy”.
(For the full bibliography, see the end of my book.)
 This view is similar to what Brian Tomasik calls consent-based negative utilitarianism: http://reducing-suffering.org/happiness-suffering-symmetric/#Consent-based_negative_utilitarianism
And the Organisation for the Prevention of Intense Suffering (OPIS) appears founded upon a virtually identical principle: http://www.preventsuffering.org/
I do not claim that this view is original; merely that it is important.
 And I have read them all, though admittedly not their complete works. Bentham can seem to come close in chapter 4 of his Principles of Morals and Legislation, where he outlines a method for measuring pain and pleasure. One of the steps of this method consists in summing up the values of “[…] all the pleasures on one side and of all the pains on the other.” And later he writes of this process that it is “[…] applicable to pleasure and pain in whatever form they appear […]”. Yet he does not write that the sum will necessarily be finite, nor, more specifically, whether every instance of suffering necessarily can be outweighed by some pleasure. I suspect Bentham, as well as Mill and Sidgwick, never contemplated this question in the first place.
 A recommendable essay on the issue is Simon Knutsson’s “Measuring Happiness and Suffering”: https://foundational-research.org/measuring-happiness-and-suffering/
 However, a defender of tranquilism would, of course, question whether we are indeed talking about a pleasure outweighing some suffering rather than it, upon closer examination, really being a case of a reduction of some form of suffering outweighing some other form of suffering
 And therefore, if one assumes a framework of so-called moral uncertainty, it seems that one should assign much greater plausibility to negative value lexicality than to positive value lexicality (cf. https://foundational-research.org/value-lexicality/), also in light of the point made in the previous chapter that many have doubted the positive value of happiness (as being due to anything but its absence of suffering), whereas virtually nobody has seriously doubted the disvalue of suffering.
 But what if there are several levels of extreme suffering, where an experience on each level is deemed so bad that no amount of experiences on a lower level could outweigh it? This is a tricky issue, yet to the extent that these levels of badness are ordered such that, say, no amount of level I suffering can outweigh a single instance of level II suffering (according to a subject who has experienced both), then I would argue that we should give priority to reducing level II suffering. Yet what if level I suffering is found to be worse than level II suffering in the moment of experiencing it, while level II suffering is found to be worse than level I suffering when it is experienced? One may then say that the evaluation should be up to some third experience-moment with memory of both states, and that we should trust such an evaluation, or, if this is not possible, we may view both forms of suffering as equally bad. Whether such dilemmas arise in the real world, and how to best resolve them in case they do, stands to me as an open question.
Thus, cf. the point about the lack of clarity and specification of values we saw two chapters ago, the framework I present here is not only not perfectly specific, as it surely cannot be, but it is admittedly quite far from it indeed. Nonetheless, it still comprises a significant step in the direction of carving out a clearer set of values, much clearer than the core value of, say, “reducing suffering”.
 A similar example is often used by the suffering-focused advocate Inmendham.
 This is, of course, essentially the same claim we saw a case for in the previous chapter: that creating happiness at the cost of suffering is wrong. The principle advocated here may be considered a special case of this claim, namely the special case where the suffering in question is deemed irredeemably bad by the subject.
 Cf. the gut feeling many people seem to have that the scenario described in The Ones Who Walk Away from Omelas should not be brought into the world regardless of how big the city of Omelas would be. Weak support for this claim is also found in the following survey, in which a plurality of people said that they think future civilization should strive to minimize suffering (over, for instance, maximizing positive experiences): https://futureoflife.org/superintelligence-survey/
A personal anecdote of mine in support of Pearce’s quote is that I tend to write and talk a lot about reducing suffering, and yet I am always unpleasantly surprised by how bad it is when I experience even just borderline intense suffering. I then always get the sense that I have absolutely no idea what I am talking about when I am talking about suffering in my usual happy state, although the words I use in that state are quite accurate: that it is really bad. In those bad states I realize that it is far worse than we tend to think, even when we think it is really, really bad. It truly is inconceivable, as Pearce writes, since we simply cannot simulate that badness in a remotely faithful way when we are feeling good, quite analogously to the phenomenon of binocular rivalry, where we can only perceive one of two visual images at a time.
 Dax describes the accident himself in the following video:
 Brülde, 2010, p. 576; Benatar, 2006, p. 63.
 And if one thinks such extreme suffering can be outweighed, an important question to ask oneself is: what exactly does it mean to say that it can be outweighed? More specifically, according to whom, and measured by what criteria, can such suffering be outweighed? The only promising option open, it seems, is to choose to prioritize the assessments of beings who say that their happiness, or other good things about their lives, can outweigh the existence of such extreme suffering — i.e. to actively prioritize the evaluations of such notional beings over the evaluations of those enduring, by their own accounts, unoutweighable suffering. What I would consider a profoundly unsympathetic choice.
 This once again hints at the point made earlier that we in practice are unable to specify in precise terms 1) what we value in the world, and 2) how to act in accordance with any set of plausible values. Rough, qualified approximations are all we can hope for.
 Or one could equivalently say that it betrays the core virtue of being consistent, as it amounts to treating/valuing similar beings differently.
 I make a more elaborate case for this conclusion in my book You Are Them.
 One might object that it makes little sense to call a failure to appreciate the value of something a bias, as this is a moral rather than an empirical disagreement, to which I would respond: 1) the two are not as easy to separate as is commonly supposed (cf. Putnam, 2002), 2) one clearly can be biased against fairly considering an argument for a moral position — for instance, we can imagine an example where someone encounters a moral position and then, due to being brought up in a culture that dislikes that moral position, fails to properly engage with and understand this position, although this person would in fact agree with it upon reflection; such a failure can fairly be said to be due to bias — and 3) at any rate, the question concerning what it is like to experience certain states of consciousness is a factual matter, including how horrible they are deemed from the inside, and this is something we can be factually wrong about as outside observers.
 Not that sparing our own mental health is not a good reason for not doing something potentially traumatizing, but the question is just whether it is really worth letting our view of our personal and collective purpose in life be handicapped and biased, at the very least less well-informed than it otherwise could be, for that reason. Whether such self-imposed ignorance can really be justified, both to ourselves and the world at large.
 Again, Robin Hanson and Kevin Simler’s book The Elephant in the Brain makes an excellent case for this claim.
 And hence being animated by this principle is perfectly compatible with living a happy, joyous, and meaningful life. Indeed, I would argue that it provides the deepest meaning one could possibly find.
 I suspect both the content and phrasing of the last couple of sentences are inspired by the following quote I saw written on Facebook by Robert Daoust: “What is at the center of the universe of ethics, I suggest, is not the sun of the good and its play of bad shadows, but the black hole of suffering.”