The spectre of the repugnant conclusion and the search for a population axiology that avoids it has endured as a focus of population ethics. This is in part because the repugnant conclusion is often interpreted as a defining problem for totalism, while the implications of averagism and related views are taken to illustrate the theoretical cost of avoiding the repugnant conclusion. However, we show that this interpretation cannot be sustained unless one focuses only on (...) a special case of the repugnant conclusion: namely, the subset of instances of the repugnant conclusion where there is no portion of the population unaffected by the choice between population outcomes (as in Derek Parfit’s original illustration). To avoid an inappropriate focus on only this proper subset of instances of the repugnant conclusion, we formulate a general characterization of the repugnant conclusion. We then prove formally that all leading welfarist axiologies imply this conclusion, including averagism and Ng’s Theory X0 , including probabilistic and ‘very repugnant’ variants that involve the addition of negative lives. We then prove that the full range of axiologies considered by population ethics each imply an extended version of the repugnant conclusion, including axiologies that are incomplete, intransitive, rank-dependent, person-affecting, and/or pluralist. The upshot is that the repugnant conclusion does not ultimately tell against any approach to axiology, and the methodological requirement to avoid the repugnant conclusion should be dropped from population axiology. (shrink)

Formal arguments have proven that avoiding the Repugnant Conclusion is impossible without rejecting one or more highly plausible population principles. To many, such proofs establish not only a deep challenge for axiology, but also pose an important practical problem of how policymaking can confidently proceed without resolving any of the central questions of population ethics. Here we offer deflationary responses: first to the practical challenge, and then to the more fundamental challenge for axiology. Regarding the practical challenge, we (...) provide an overview of recent literature that explores the implications for public policy of the Repugnant Conclusion and related puzzles within population ethics, and shows that there is more commonality in the implications of different population axiologies than is generally recognized. The upshot is that uncertainty about population ethics presents no important problem for policymaking, and the importance of population ethics to policymaking has been overstated. We then turn to more fundamental issues about axiology, and describe a new series of formal proofs that undermine the idea that any plausible axiology could avoid the Repugnant Conclusion, including those that are assumed to avoid it in the literature. The philosophical upshot is that the Repugnant Conclusion cannot plausibly be avoided, and so it is a mistake to assume as a constraint on a plausible axiology that it must be avoided, as is assumed by most of the literature in population ethics, including by all of the fundamental impossibility theorems. (shrink)

Most people (including moral philosophers), when faced with the fact that some of their cherished moral views lead up to the Repugnant Conclusion, feel that they have to revise their moral outlook. However, it is a moot question as to how this should be done. It is not an easy thing to say how one should avoid the Repugnant Conclusion, without having to face even more serious implications from one's basic moral outlook. Several such attempts are (...) presented in this volume. This is the first volume devoted entirely to the cardinal problem of modern population ethics, known as 'The Repugnant Conclusion'. This book is a must for (moral) philosophers with an interest in population ethics. (shrink)

This article explores the main similarities and differences between Derek Parfit’s notion of imprecise comparability and a related notion I have proposed of parity. I argue that the main difference between imprecise comparability and parity can be understood by reference to ‘the standard view’. The standard view claims that 1) differences between cardinally ranked items can always be measured by a scale of units of the relevant value, and 2) all rankings proceed in terms of the trichotomy of ‘better than’, (...) ‘worse than’, and ‘equally good’. Imprecise comparability, which can be understood in terms of the more familiar notions of cardinality and incommensurability, rejects only the first claim while parity rejects both claims of the standard view. -/- I then argue that insofar as those attracted to imprecise comparability assume that all rankings are trichotomous, as Parfit appears to, the view should be rejected. This is because imprecise equality is not a form of equality but is a sui generis ‘fourth’ basic way in which items can be ranked. We should, I argue, understand imprecise equality as parity, and imprecise comparability as entailing ‘tetrachotomy’ – that if two items are comparable, one must better than, worse than, equal to, or on a par with the other. Thus those attracted to the idea that cardinality can be imprecise should abandon trichotomy and accept parity and tetrachotomy instead. -/- Finally, I illustrate the difference between Parfit’s trichotomous notion of imprecise comparability and parity by examining how each notion might be employed in different solutions to the problem posed by the Repugnant Conclusion in population ethics. I suggest that parity provides the arguably more ecumenical solution to the problem. (shrink)

The repugnant conclusion can be formulated as follows: For any population consisting of people with very high positive welfare, there is a better population in which everyone has a very low positive welfare, other things being equal. As the name indicates, this conclusion appears unacceptable. Yet it has proven to be surprisingly difficult to find a theory that avoids it without implying other very counterintuitive conclusions. Moreover, the conclusion is a problem not just for total utilitarians (...) or those committed to welfarism but for all moral theories according to which welfare matters at least when all other things are equal, which arguably is a minimal adequacy condition for any moral theory. And, not the least, how to deal with it has implications for the present generations’ duties to future generations and intergenerational justice. The question as to how the repugnant conclusion should be dealt with has thus become one of the cardinal challenges of modern ethics, and the inquiry into what it shows about the nature of ethics has opened up many new avenues for research. This chapter covers the different suggestions in the literature on how to do deal with the conclusion, both on the axiological and on the normative levels. Moreover, the conclusion and different ways of deriving it are explained in detail. (shrink)

In Derek Parfit's original formulation the Repugnant Conclusion is characterized as follows: “For any possible population of at least ten billion people, all with a very high quality of life, there must be some much larger imaginable population whose existence, if other things are equal, would be better even though its members have lives that are barely worth living” (Parfit 1984). The Repugnant Conclusion highlights a problem in an area of ethics which has become known as (...) population ethics . The last three decades have witnessed an increasing philosophical interest in questions such as “Is it possible to make the world a better place by creating additional happy creatures?” and “Is there a moral obligation to have children?” The main problem has been to find an adequate theory about the moral value of states of affairs where the number of people, the quality of their lives, and their identities may vary. Since, arguably, any reasonable moral theory has to take these aspects of possible states of affairs into account when determining the normative status of actions, the study of population ethics is of general import for moral theory. As the name indicates, Parfit finds the Repugnant Conclusion unacceptable and many philosophers agree. However, it has been surprisingly difficult to find a theory that avoids the Repugnant Conclusion without implying other equally counterintuitive conclusions. Thus, the question as to how the Repugnant Conclusion should be dealt with and, more generally, what it shows about the nature of ethics has turned the conclusion into one of the cardinal challenges of modern ethics. (shrink)

The Repugnant Conclusion is closer to infinity-based arguments, such as Pascal’s Wager, than it at first appears. Both rely on an unbounded set of payoff comparisons. It is possible to restructure Pascal’s Wager to resemble the Repugnant Conclusion more closely, as the use of infinity is not central to the former. I then consider settings in which the set of comparisons is bounded, so as to differentiate Parfit’s problem from the more general issues involved with very (...) large numbers. We then find the Repugnant Conclusion no longer necessarily arises as a matter of logic rather is an empirical contingency. I then present some plausible intuitions under which the Repugnant Conclusion never arises. The paradoxical nature of Parfit’s Repugnant Conclusion is traced to the simultaneous application of two inconsistent outside observer constructs: one to judge the Repugnant Conclusion as repugnant, and another to define the utility scale for a marginally worthwhile life. Once the two constructs are made consistent, the Repugnant Conclusion can be defused. (shrink)

The Repugnant Conclusion is a controversial theorem about population size. It states that a sufficiently large population of lives that are barely worth living is better than a smaller population of high quality lives. This is highly counter-intuitive. It implies that we can improve the world by trading quality of life for quantity of lives. Can it be defended? Christopher Cowie explores these questions and unpacks the controversies surrounding the Repugnant Conclusion. He focuses on whether the (...) truth of the Repugnant Conclusion turns - as some have claimed - on the uncomfortable claim that many people's lives are actually bad for them and that even privileged people lead lives that are only just worth living. Highly recommended for those interested in ethics, applied ethics and population studies The Repugnant Conclusion will also be of interest to those in related disciplines such as economics, development studies, politics and international relations. (shrink)

According to the Repugnant Conclusion: Compared with the existence of many people who would all have some very high quality of life, there is some much larger number of people whose existence would be better, even though these people would all have lives that were barely worth living. I suggest some ways in which we might be able to avoid this conclusion. I try to defend a strong form of lexical superiority.

Most people (including moral philosophers), when faced with the fact that some of their cherished moral views lead up to the Repugnant Conclusion, feel that they have to revise their moral outlook. However, it is a moot question as to how this should be done. It is not an easy thing to say how one should avoid the Repugnant Conclusion, without having to face even more serious implications from one's basic moral outlook. Several such attempts are (...) presented in this volume. This is the first volume devoted entirely to the cardinal problem of modern population ethics, known as 'The Repugnant Conclusion'. This book is a must for (moral) philosophers with an interest in population ethics. (shrink)

According to Derek Parfit's well‐known argument, a version of utilitarian moral theory implies the so‐called Repugnant Conclusion. This version of utilitarianism states that other things being equal, it is better if there is a greater total sum of whatever makes life worth living. This view appears to implicate that a world where there is an immense total sum of whatever makes life worth living but where individual people have an exceedingly low quality of life is better than a (...) world where there are considerably less people and a smaller total sum of whatever makes life worth living but where individual people have a high quality of life. Parfit finds the conclusion hard to accept. However, a Swedish philosopher Torbjörn Tännsjö has recently replied to Parfit, arguing that, in fact, the Repugnant Conclusion is perfectly acceptable. Tännsjö's reply, in turn, has been criticized by another Swede, Gustaf Arrhenius. In my paper I evaluate both Tännsjö's reply and Arrhenius' criticism and find both of them insufficient. (shrink)

In engaging with the repugnant conclusion many contemporary philosophers, economists and social scientists make claims about what a minimally good life is like. For example, some claim that such a life is quite good by contemporary standards, and use this to defend classical utilitarianism, whereas others claim that it is not, and use this to uphold the challenge that the repugnant conclusion poses to classical utilitarianism. I argue that many of these claims—by both sides—are not well-founded. (...) We have no sufficiently clear sense of what a minimally good life is like. It is a result of this that the repugnant conclusion doesn’t license us in drawing any interesting conclusions. (shrink)

On an act utilitarian view it is morally permissible if not obligatory to choose to perform an action which contributes as much as any other action to the total happiness of all those capable of enjoying happiness. As the view has just been stated, however, there is some question of how we are to understand the phrase “all those capable of enjoying happiness”. For even leaving aside the possibility that animals or spirits might be included, there is still the matter (...) of the size of the population of humans “capable of enjoying happiness”. Furthermore, among our ethical decisions themselves are decisions which would cause a decrease or increase in population and which in perhaps even more specific ways determine the applicability of this phrase “all those capable of enjoying happiness”. According to the socalled classical or total utilitarian principle, the phrase in question is understood as describing some population whose existence will enable one to maximize the net amount of happiness. For on the classical principle what one is obligated to do is simply to maximize net happiness. (shrink)

Two objects of valuation are said to be incommensurable if neither is better than the other, nor are they equally good. This negative, coarse-grained characterization fails to capture the nuanced structure of incommensurability. We argue that our evaluative resources are far richer than orthodoxy recognizes. We model value comparisons with the corresponding class of permissible preference orderings. Then, making use of our model, we introduce a potentially infinite set of degrees of approximation to better, worse, and equally good, which we (...) interpret as degrees of commensurability.One payoff is the solution our approach provides to a paradox in population ethics, generated by Parfit's “Continuum Argument”. Parfit imagines a sequence of populations, starting with one consisting of excellent lives and, by a sequence of apparent improvements, reaching a much larger population of lives barely worth living. What he dubs “the Repugnant Conclusion” is that the final population is better than the first. Developing Parfit's response, we argue that some of the populations in the sequence are merely almost better than their immediate predecessors. Almost better is not transitive (unlike better). We offer analogies to other ‘spectrum arguments’, Condorcet's paradox, and to developments in formal epistemology. (shrink)

This article articulates and defends a dissolution of the so-called repugnant conclusion, which focuses on the notion of life worth living figuring both in Parfit's formulation of the repugnant conclusion and in most responses to such a conclusion. The proposed dissolution demonstrates that the notion of life worth living is plagued by multiple ambiguities and that these ambiguities, in turn, hamper meaningful debate about both the issue of whether the repugnant conclusion can be (...) avoided and the issue of whether the repugnant conclusion is actually repugnant. This result does not exclude that some modified versions of the repugnant conclusion may yield valuable insights about the value of populations and the tenability of different axiological/ethical theories. Still, if the proposed dissolution is correct, then the repugnant conclusion rests on an ill-defined notion and we lack the information required to assess the merits of the repugnant conclusion. (shrink)

The Repugnant Conclusion served an important purpose in catalyzing and inspiring the pioneering stage of population ethics research. We believe, however, that the Repugnant Conclusion now receives too much focus. Avoiding the Repugnant Conclusion should no longer be the central goal driving population ethics research, despite its importance to the fundamental accomplishments of the existing literature.

The aim of this paper is to discuss the plausibility of a certain position in the philosophical literature within which the Repugnant Conclusion is treated, not as repugnant, but as an acceptable implication of the total welfare principle. I will confine myself to focus primarily on Törbjörn Tännsjö’s presentation. First, I reconstruct Tännsjö’s view concerning the repugnance of the RC in two arguments. The first argument is criticized for (a) addressing the wrong comparison, (b) relying on the (...) controversial claim that the privileged people in our actual world only have lives barely worth living and (c) that Tännsjö’s identification between Z-lives and privileged lives is restricted to certain versions of the notion ‘barely worth living’ – a restriction that weakens the force of the argument. The second argument is criticized because some of it premises entailed (b) and (d) for its implausible claim that non-imaginable outcomes cannot be compared. (shrink)

In Chapter 17 of his magnificent Reasons and Persons, Derek Parfit asks what he describes as an ‘awesome question’: ‘How many people should there ever be?’ For a utilitarian like me, the answer seems simple: there should be however many people it takes to make the world best. Unfortunately, if I answer Parfit's awesome question in this way, I may sink myself in a quagmire of axiological confusion. In this paper, I first describe certain aspects of the quagmire. Then I (...) introduce and explain some of the elements of a novel axiological view – ‘justicism’. Justicism is derived from some ideas originally suggested by Franz Brentano. It was developed in an effort to solve certain other problems confronting utilitarianism – problems explicitly about justice. I think, however, that as a sort of happy by-product, justicism also generates a plausible answer to Parfit's awesome question. This may come as a bit of surprise, since justicism is a form of totalism, and it is widely thought that no totalistic theory can provide a satisfactory answer to Parfit's question. After presenting and explaining my proposed solution, I address some objections. (shrink)

James Griffin has considered a form of superiority in value that is weaker than lexical priority as a possible remedy to the Repugnant Conclusion. In this article, I demonstrate that, in a context where value is additive, this weaker form collapses into the stronger form of superiority. And in a context where value is non-additive, weak superiority does not amount to a radical value difference at all. These results are applied on one of Larry Temkin's cases against transitivity. (...) I demonstrate that Temkin appeals to two conflicting notions of aggregation. I then spell out the consequences of these results for different interpretations of Griffin's suggestion regarding population ethics. None of them comes out very successful, but perhaps they nevertheless retain some interest. (shrink)

The Repugnant Conclusion and its paradoxes pose a significant problem for outcome evaluation. Derek Parfit has suggested that we may be able to resolve this problem by accepting a view he calls ‘Perfectionism’, which gives lexically superior value to ‘the best things in life’. In this paper, I explore perfectionism and its potential to solve this problem. I argue that perfectionism provides neither a sufficient means of avoiding the Repugnant Conclusion nor a full explanation of its (...) repugnance. This is because even lives that are ‘barely worth living’ may contain the best things in life if they also contain sufficient ‘bad things’, such as suffering or frustration. Therefore, perfectionism can only fully explain or avoid the Repugnant Conclusion if combined with other claims, such as that bad things have an asymmetrical value relative to many good things. This combined view faces the objection that any such asymmetry implies Parfit’s ‘Ridiculous Conclusion’. However, I argue that perfectionism itself faces very similar objections, and that these are question-begging against both views. Finally, I show how the combined view that I propose not only explains and avoids the Repugnant Conclusion but also allows us to escape many of its paradoxes as well. (shrink)

In “An Intrapersonal Addition Paradox,” Jacob Nebel provides a novel intrapersonal argument for the Repugnant Conclusion. The most controversial premise of Nebel’s argument is the “Probable Addition Principle,” on which it is better for individuals to receive additional chances of existence with a life worth living. I provide an alternative intrapersonal argument for the Repugnant Conclusion which does not assume the Probable Addition Principle. I also show that Pareto principles alone, when conjoined with very minimal principles (...) of prudence, imply a version of the Repugnant Conclusion. (shrink)

Total views imply what Derek Parfit has called ‘the repugnant conclusion’. There are several strategies aimed at debunking the intuition that this implication is repugnant. In particular, it goes away when we consider the principle of unrestricted instantiation, according to which any instantiation of the repugnant conclusion must appear repugnant if we should be warranted in relying on it as evidence against total theories. However, there are instantiations of the conclusion where it doesn't (...) seem to be at all repugnant. Hence there is nothing repugnant about the repugnant conclusion as such. The faults with total views have nothing to do with large numbers or with the conclusion as such. It is possible, if you like, to correct these putative faults even if you adopt some total view (different from utilitarianism). (shrink)

Derek Parfit has famously pointed out that ‘total’ utilitarian views, such as classical hedonistic utilitarianism, lead to the conclusion that, to each population of quite happy persons there corresponds a more extensive population with people living lives just worth living, which is better. In particular, for any possible population of at least ten billion people, all with a very high quality of life, there must be some much larger imaginable population whose existence, if other things are equal, would be (...) better, even though its members have lives that are barely worth living. This world is better if the sum total of well-being is great enough, and it is great enough if only enough sentient beings inhabit it. This conclusion has been considered by Parfit and others to be ‘repugnant’. (shrink)

Derek Parfit defends the Imprecise Lexical View as a way to avoid the Repugnant Conclusion. Allowing for ‘imprecise equality’, Parfit argues, makes it possible to avoid some well-known problems for the Lexical View. It is demonstrated that the Lexical View has stronger implications than envisaged by Parfit; moreover, his assumption of Non-diminishing Marginal Value makes the Lexical View collapse into a much stronger view, which lets the two appear incompatible. Introducing imprecise equality does not address the latter problem. (...) But it does makes it possible for the Imprecise Lexical View to soften the discontinuities it would otherwise face, at the cost of blurring the difference between options.However, if Non-diminishing Marginal Value is rejected, the remaining complications for the resulting most plausible version of the Imprecise Lexical View, including a confrontation with Arrhenius’ Non-Elitism Condition, may be within a range where the view largely remains defensible. (shrink)

Parfit’s Repugnant Conclusion argues, against intuition, that for any world A, another world Z with higher population and minimal well-being is better. That intuition is incorrect because the argument has not considered resources that support well-being. Z must have many more resources supporting well-being than A does. Z is repugnant because it spreads those resources among too many people; another world with Z’s resources and fewer people, if available, would be far superior. But Z is still better (...) than A; it is worth accepting its very large population to get the resources needed to support their well-being. (shrink)

Parfit’s Repugnant Conclusion argues, against intuition, that for any world A, another world Z with higher population and minimal well-being is better. That intuition is incorrect because the argument has not considered resources that support well-being. Z must have many more resources supporting well-being than A does. Z is repugnant because it spreads those resources among too many people; another world with Z’s resources and fewer people, if available, would be far superior. But Z is still better (...) than A; it is worth accepting its very large population to get the resources needed to support their well-being. (shrink)

In a series of articles on population theory, culminating in his 1984 b00k Reasons and Persons, Dcrck Pariit presented dilemmas for utilitarian and conscqucntialist moral theories.] ParHt’s work has led to rcncwcd interest in thc theory of optimal population. More generally, Pariit is searching for a general theory of bcncHcencc—"Theory X"——that also will covcr population comparisons. Theory X corresponds to Kenneth Arrow’s notion of a social welfare function—both attempt t0 provide 21 generic formula or algorithm for ranking social outcomes on (...) the basis of their characteristics. (shrink)

Population axiology concerns how to evaluate populations in regard to their goodness, that is, how to order populations by the relations “is better than” and “is as good as”. This field has been riddled with “paradoxes” which seem to show that our considered beliefs are inconsistent in cases where the number of people and their welfare varies. Already in Derek Parfit’s seminal contribution to the topic, an informal paradox — the Mere Addition Paradox — was presented and later contributions have (...) proved similar results.1 All of these contributions, however, have one thing in common: They all involve an adequacy condition that rules out Parfit’s Repugnant Conclusion: The Repugnant Conclusion: For any perfectly equal population with very high positive welfare, there is a population with very low positive welfare which is better, other things being equal.2 A number of theorists, however, have argued that we should accept the Repugnant Conclusion and hence that avoidance of this conclusion is not a convincing adequacy condition for a population axiology. Torbjörn Tännsjö, for example, argues that the Repugnant Conclusion is not at all repugnant but rather “an unsought, but acceptable, consequence of hedonistic utilitarianism”:3.. (shrink)

The population ethics literature has long focused on attempts to avoid the repugnant conclusion. We show that a large set of social orderings that are conventionally understood to escape the repugnant conclusion do not in fact avoid it in all instances. As we demonstrate, prior results depend on formal definitions of the repugnant conclusion that exclude some repugnant cases, for reasons inessential to any "repugnance" (or other meaningful normative properties) of the repugnant (...) conclusion. In particular, the literature traditionally formalizes the repugnant conclusion to exclude cases that include an unaffected sub-population. We relax this normatively irrelevant exclusion, and others. Using several more inclusive formalizations of the repugnant conclusion, we then prove that any plausible social ordering implies some instance of the repugnant conclusion. This understanding-that it is impossible to avoid all instances of the repugnant conclusion-is broader than the traditional understanding in the literature that the repugnant conclusion can only be escaped at unappealing theoretical costs. Therefore, the repugnant conclusion provides no methodological guidance for theory or policy-making, because it does not discriminate among candidate social orderings. So escaping the repugnant conclusion should not be a core goal of the population ethics literature. (shrink)

Total utilitarianism implies Parfit's repugnant conclusion. For any world containing ten billion very happy people, there is a better world where a vast number of people have lives barely worth living. One common response is to claim that life in Parfit's Z is better than he suggests, and thus that his conclusion is not repugnant. This paper shows that this strategy cannot succeeed. Total utilitarianism also implies a reverse repugnant conclusion. For any world where (...) ten billion people have lives of excruciating agony, there is a worse world where a vast number of people have lives almost worth living. This reverse repugnant conclusion is at least as repugnant as Parfit's original. If we avoid the latter by raising the zero level, then the former becomes more repugnant. We cannot save total utilitarianism by tinkering with the zero level. (shrink)

Most philosophers discuss the Repugnant Conclusion as an objection to total utilitarianism. But this focus on total utilitarianism seems to be one-sided. It conceals the important fact that other competing moral theories are also subject to the Repugnant Conclusion. The primary aim of this paper is to demonstrate that versions of egalitarianism are subject to the Repugnant Conclusion and other repugnant conclusions.

Recently, Derek Parfit has offered a novel solution to the “Repugnant Conclusion” that compared with the existence of many people whose quality of life would be very high, there is some much larger number of people whose existence would be better but whose lives would be barely worth living. On this solution, qualitative differences between two populations will often entail that the populations are merely “imprecisely” comparable. According to Parfit, this fact allows us to avoid the Repugnant (...) Conclusion without violating the transitivity of better than. In this paper, I argue that Parfit’s view nevertheless implies two objectionable conclusions. The first is an alternative version of the Repugnant Conclusion that, Parfit suggests, may not be all that repugnant. The second is a revised version of the first that is nearly identical to the Repugnant Conclusion. I conclude that Parfit’s view offers no escape from repugnance. (shrink)

This paper establishes a new impossibility result for welfaristic evaluations when the population varies. We consider a weak version of the repugnant conclusion instead of the commonly used version. It is shown that if a population principle satisfying two reasonable properties avoids the sadistic conclusion, then the weak repugnant conclusion must hold. We use a general variable-population setting where the identities of individuals can matter.

Both utilitarian and deontological moral theories locate the source of our moral beliefs in the wrong sorts of considerations. One way this failure manifests itself, we argue, is in the ways these theories analyze the proper human relationship toward the non-human environment. Another, more notorious, manifestation of this failure is found in Derek Parfit's Repugnant Conclusion. Our goal is to explore the connection between these two failures, and to suggest that they are failures of act-centered moral theories in (...) general. As such, they cannot be fixed by simply developing a better version of such a theory. Virtue-based theories, we suggest, provide a more promising alternative. (shrink)

Effective altruism is committed to Altruistic Maximization – the claim that any impact of giving to charities ought to be maximized at the margins and counterfactually. This may lead to counterintuitive or contradictory conclusions in certain cases. For instance, when we can bring about a substantial benefit to few or a tiny benefit to a larger number at the same cost, spreading of benefits across a great number of recipients can compensate substantial loss for fewer people. However, sometimes the perspective (...) of widely spreading tiny benefits instead than giving substantial benefits to small groups is counterintuitive, and repugnantly wrong. Call this the ‘Altruistic Repugnant Conclusion.’ Standard solutions to the Repugnant Conclusion do not work if applied to the Altruistic Repugnant Conclusion. The Altruistic Repugnant Conclusion can be rebutted by giving up on the idea that judgements on such cases should be precise. But imprecision undermines Altruistic Maximization. Hence a dilemma for effective altruists follows: either they accept some strongly counterintuitive judgments—weakening the attractiveness of their position—or they give up on the maximizing requirement, thus admitting sub-optimal contributions. (shrink)