Seemingly every theory of population ethics is confronted with unpalatable implications. While various approaches to the subject have been taken, including non-consequentialist approaches, this area has been dominated by utilitarian thought. The two main approaches to population ethics have been total utilitarianism () and average utilitarianism (). According to TU, we should seek to bring about the state of affairs that maximizes the total amount of happiness. According to AU, we should seek to bring about the state of affairs that (...) maximizes average per capita happiness. Both theories have been afflicted by seemingly strong objections, and as a result, numerous variations and hybrids have been introduced. Despite the widespread disagreement in the field, though, a near consensus has developed in rejecting AU as an absurd view. In this article, however, I will go against the grain and argue that AU is the theory of population ethics that we should endorse. (shrink)

Ethical theory faces a group of difficult puzzles concerning populations. Here is one: would it be right to maximize utility by causing the number of people existing in the further future to be very, very large, even if this means that each of their lives is barely worth living? Derek Parfit concludes that standard utilitarianism yields the result that it would be right to create such a world. He calls this conclusion "repugnant." I begin with an examination of the objection, (...) in which I argue that the problem is axiological, not normative. I present my interpretation of the problem, and consider and reject the most popular and plausible responses in the literature. ;Many people agree with Parfit that the repugnant conclusion is unacceptable. They see this as a strong objection to impersonalism, and conclude that only person-affecting utilitarianism solves the population problems in question. I argue that the most credible person-affecting theories incorrectly answer simple population questions and are deficient in other respects. ;Need we accept Parfit's objection? I advance my own view---that there are totalistic axiologies that do not imply the repugnant conclusion, and defeat the mere addition paradox. I show that these theories have much in common with classical totalism, and they give the intuitively correct result in the crucial cases under consideration. (shrink)

Rawls's theory of political obligation attempts to avoid the obvious flaws of a Lockean consent model. Rawls rejects a requirement of consent for two reasons: First, the consent requirement of Locke’s theory was intended to ensure that the liberty and equality of the contractors was respected, but this end is better achieved by the principles chosen in the original position, which order the basic structure of a society into which citizens are born. Second, "basing our political ties upon a principle (...) of obligation would complicate the assurance problem." Instead, Rawls offers a duty-based account, whereby we are duty-bound to support and comply with just institutions that apply to us. A. John Simmons argues that Rawls cannot meet the particularity requirement of establishing political obligation to only one state. I assess the response that this requirement can be met by the political constructivist element of Rawls's theory. I conclude that there are fatal flaws in this response. (shrink)

One of the most difficult issues to sort out morally is our obligation to future generations. Most individuals feel that they do indeed have some kind of obligation, but face difficulty in explaining the exact nature of the obligation. For one, it seems impossible to know the wants and desires of future generations, and furthermore the existence of the persons we are obligated to is entirely dependent upon the choices that we in fact make. In essence, we could shape future (...) generations so that they desire exactly what we provide for them. It seems that no matter what principle we adopt that is based upon these potential individuals we are led to absurd conclusions. Gregory Kavka calls this moral grappling the Paradox of Future Individuals. I believe that the ethical concerns surrounding genetic engineering should be seen as a specific instantiation of this Paradox and that by examining both we may be able to come up with some sort of working solution. Derek Parfit pleads ignorance as to a solution to this Paradox after an extensive exegesis on the issue, but as we may not be that far from shopping a genetic supermarket to determine the characteristics of our children I don’t believe we can settle for that conclusion. We will begin by examining the Paradox and suggested solutions to the Paradox. Next I will address how the Paradox relates directly to genetic engineering and discuss how rights-based arguments aimed against genetic engineering fail because of the nature of identity. Then I will consider how David Heyd’s Genero-centric principle applies to genetic engineering specifically and how a modified version of that principle may guide us out of the Paradox of Future Individuals in general. This solution may not be acceptable to utilitarian sensibilities, but it is because the numbers don’t add up that we may need to appeal to a different principle entirely. (shrink)

Ultimately this book provides a theory of intergenerational justice that is both intellectually robust and practical with wide applicability to law and policy.

I defend the 'Repugnant' Conclusion that for any possible population of happy people, a population containing a sufficient number of people with lives barely worth living would be better. Four lines of argument converge on this conclusion, and the conclusion has a simple, natural theoretical explanation. The opposition to the Repugnant Conclusion rests on a bare appeal to intuition. This intuition is open to charges of being influenced by multiple distorting factors. Several theories of population ethics have been devised to (...) avoid the Repugnant Conclusion, but each generates even more counterintuitive consequences. The intuition opposing the Repugnant Conclusion is thus among the best candidates for an intuition that should be revised. (shrink)

This essay considers principles of distributive justice for access to reproductive biotechnologies which make it is possible to enhance the traits of human offspring. I provide prima facie reason to think that redistributive principles apply to genetic goods and proceed to evaluate the way in which four distributive patterns - egalitarianism, luck egalitarianism, prioritarianism, and sufficientarianism - would implement a just distribution of genetic goods. I argue that the currency of genetic redistribution consists in natural primary goods like health, vision, (...) and rationality as these goods contribute to the biological component of basic capabilities, like being healthy, seeing properly, and being able to reason. I develop a mixed sufficiency/priority approach to genetic enhancement, and defend this approach against objections. (shrink)

abstract Some day, perhaps soon, we may have genetic enhancements enabling us to conquer aging. Should we do so, if we can? I believe the topic is both interesting and important, and that it behoves us to think about it. Doing so may yield important insights about what we do care about, what we should care about, and how we should seek to live our lives, both individually and collectively. My central question is this: Is living longer, living better? My (...) paper does not offer a sustained argument for a single, considered, thesis. Rather, it offers a number of snippets of often-unconnected thoughts relevant to the issues my question raises. The paper contains seven sections. Part one is introductory. Part two comments on some current longevity research. Part three indicates the attitudes towards death and science with which I approach these questions. Parts four and five, respectively, discuss some worries about immortality raised by Leon Kass and Bernard Williams. Part six points to some practical, social, and moral concerns that might arise if society's members lived super long lives. Part seven concludes by suggesting that we should favour living well over living longer, and ongoing reproduction over immortality; correspondingly, I suggest that we should think long and hard before proceeding with certain lines of longevity research. (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)

If a future AI system can enjoy far more well-being than a human per resource, what would be the best way to allocate resources between these future AI and our future descendants? It is obvious that on total utilitarianism, one should give everything to the AI. However, it turns out that every Welfarist axiology on the market also gives this same recommendation, at least if we assume consequentialism. Without resorting to non-consequentialist normative theories that suggest that we ought not always (...) create the world with the most value, or non-welfarist theories that tell us that the best world may not be the world with the most welfare, I propose a new theory that justifies giving some resources to humanity in the face of overwhelming AI well-being. I call this new theory, “Group Prioritarianism". (shrink)

Jan Narveson has articulated a deeply held, widely shared intuition regarding what moral law has to say about bringing additional people into existence: while we are “in favour of making people happy,” we are “neutral about making happy people.” Various formulations of the Narvesonian intuition (closely related to the _person-affecting intuition_ or _restriction_) have been widely criticized. This present paper outlines an off-the-beaten-path alternate construction of the intuition—the _existence condition_—and argues that that particular construction has the resources to avoid some (...) of those criticisms. But still other considerably more widely recognized alternate constructions have been offered as well. Thus John Broome outlines what he calls the _neutrality intuition_. While Broome finds the underlying intuition “strongly attractive,” he nonetheless argues that the neutrality intuition itself leads us quickly into inconsistency. Wlodek Rabinowicz disagrees. On his view, Broome’s inconsistency argument shows, not that the neutrality intuition is false, but rather that it doesn’t follow, from the fact that the outcome, or possible future or _world_, that includes the additional person is neither better nor worse than the (otherwise similar) world that excludes that person, that the one world is exactly as good as the other. The better view, according to Rabinowicz, is that, on occasion, and specifically when the coming into existence of additional people is at stake, the one world is _incommensurate_ with the other. What is called the _principle of trichotomy_ is, in other words, false. Difficulties arise, however, when we try to reject that seemingly compelling conceptual principle. This present paper concludes with the argument that the availability of the existence condition—which, together with certain other uncontroversial moral principles and a handful of conceptual principles, forms the _existential approach_—shows that we can maintain the most intuitive parts of neutrality intuition while avoiding both Broome’s inconsistency worry and Rabinowicz’s commitment to incommensurability. Incommensurability may be correct on other grounds—but not, this present paper argues, on the grounds provided by Broome’s inconsistency argument. (shrink)

Since its proposal in 1984, Derek Parfit’s ‘Non-Identity Problem’ has significantly influenced how social choice theorists understand existential harms and benefits. The ‘problem’ raises the question of whether parents act wrongly when they choose to create a child with a life barely worth living. It suggests that if the alternatives would have either resulted in a life not worth living or non-existence, then the parents are not liable for moral criticism. This article challenges Parfit’s premise by advocating for a Minimal (...) Concern Clause that is generated through the parental relation. The Clause operates under the assumption that non-existence is not a valanced experiential state and is thus not comparable to any positive state of existence. The argument unfolds in two main steps: firstly, it disputes the premise in Same-Number Cases by proposing an alternative semantic distinction between objects of reference, particularly, the status of a merely possible person. Secondly, it contends that in Different-Number Cases, parents are obligated to exercise minimal prudence under conditions of uncertainty, and that the moral weight of the Minimal Concern Clause must be compounded to reflect the replicable nature of procreation. (shrink)

Pareto principles are at the core of ethics and decision theory. The Strong Pareto principle says that if one thing is better than another for someone and at least as good for everyone else, then the one is overall better than the other. But a host of famous figures express it differently, with ‘not worse’ in place of ‘at least as good.’ In the presence of parity (or incommensurability), this results in a strictly stronger Pareto principle, which I call Super‐Strong (...) Pareto. Super‐Strong Pareto, however, yields cyclic betterness and is therefore false. I point out a number of influential arguments—concerning population ethics, collective action problems, and decision‐making in the face of parity and uncertainty—that crucially rely on Super‐Strong Pareto and are therefore unsound. I then turn to the most influential argument against the possibility of parity—Broome's collapsing argument—and argue that it likewise relies on Super‐Strong Pareto reasoning and is therefore question‐begging. Finally, I turn to the much‐neglected question of how to justify Strong Pareto. The answer I arrive at, which emphasizes tie‐breaking, yields a striking insight, namely that Super‐Strong Pareto amounts to the denial of insensitivity to mild sweetening. That is what makes it problematic in the presence of parity. (shrink)

Person-affecting views in population ethics state that (in cases where all else is equal) we’re permitted but not required to create people who would enjoy good lives. In this paper, I present an argument against every possible variety of person-affecting view. The argument takes the form of a dilemma. Narrow person-affecting views must embrace at least one of three implausible verdicts in a case that I call ‘Expanded Non-Identity.’ Wide person-affecting views run into trouble in a case that I call (...) ‘Two-Shot Non-Identity.’ One plausible practical upshot of my argument is as follows: we individuals and our governments should be doing more to reduce the risk of human extinction this century. (shrink)

In this paper, we argue that our moral concern for future well-being should reduce over time due to important practical considerations about how humans interact with spacetime. After surveying several of these considerations (around equality, special duties, existential contingency, and overlapping moral concern) we develop a set of core principles that can both explain their moral significance and highlight why this is inherently bound up with our relationship with spacetime. These relate to the equitable distribution of (1) moral concern in (...) a universe that we can only causally affect in one temporal direction; (2) access to the benefits from using spacetime as a resource; and (3) the burdens of care given (1) and (2). We conclude by considering the practical implications of our argument and find that, while it is often assumed that a preference for present over future well-being weakens the case for existential risk mitigation, this likely is not the case. (shrink)

Relational egalitarians claim that a situation is just only if everyone it involves relates to one another as equals. It implies that relational egalitarians believe the ideal of “living as equals” (for short) is desirable, and furthermore, necessary for justice. In this paper, I distinguish three accounts of the desirability of the ideal: the instrumental value account, the non‐instrumental value account, and the non‐consequentialist account. I argue that the former two accounts cannot provide satisfying reasons for being a relational egalitarian. (...) Instead, the ideal of “living as equals” ought to be understood as fundamentally a moral requirement in a non‐consequentialist sense. In addition, a pluralist (though fundamentally non‐consequentialist) approach is welcome. (shrink)

Here I will re-purpose Nozick’s (1974) “Experience Machine” thought experiment against hedonism into an argument against Veritic Epistemic Consequentialism. According to VEC, the right action, epistemically speaking, is the one that results in at least as favorable a ratio of true to false belief as any other action available. A consequence of VEC is that it would be epistemically right to outsource all your cognitive endeavors to a matrix-like “True Belief Machine” that uploads true beliefs through artificial stimulation. Rather than (...) reflecting, inferring or inquiring, all of your beliefs would be the product of updates coming from the machine. This implication of VEC is counter intuitive. I will spend much of the paper considering defensive maneuvers and showing them to be lacking. The problem with going in for the True Belief Machine seems to be that the subject forfeits her autonomy. There has been much work lately on the virtue of intellectual autonomy and some of it has the potential to explain what is epistemically amiss about plugging into the machine. However, I will argue that the proponent of VEC cannot appeal to it without abandoning her preferred order of explanation. (shrink)

According to the person-affecting view, the ethics of welfare should be cashed out in terms of how the individuals are affected. While the narrow version fails to solve the non-identity problem, the wide version is subject to the repugnant conclusion. A middle view promises to do better – the Interpersonal Comparative View of Welfare (ICV). It modifies the narrow view by abstracting away from individuals’ identities to account for interpersonal gains and losses. The paper assesses ICV’s merits and flaws. ICV (...) solves the non-identity problem, avoids the repugnant conclusion, and seems to accommodate the person-affecting intuition. But it cuts too many things along the way: ICV obstructs the advantage of the wide view to account for all future individuals’ welfare, abandons the intuitions that underlie the narrow view, and even violates its own presuppositions by turning out to be merely pseudo person-affecting. (shrink)

According to the procreation asymmetry, we have strong pro tanto reason to do what prevents someone from coming into a miserable existence—an existence so bad that it would be rational to prefer having never been born—solely because it prevents them from coming into a miserable existence, but we do not have strong pro tanto reason to do what allows someone to come into a happy existence solely because it allows them to come into a happy existence. At best, the fact (...) that an act would create a happy person merely offsets the reasons we have to avoid that act—i.e., an act that would be impermissible because it brings a miserable person into existence could be rendered permissible if it also brought into existence enough happy people. In this paper, I first argue that there is an intuitive asymmetry in the offsetting weight of happy humans and the offsetting weight of happy animals: the offsetting weight of happy animal lives vis-à-vis miserable animal lives appears to be greater than the offsetting weight of happy human lives vis-à-vis miserable human lives. This is the Procreation Asymmetry Asymmetry. I then argue that there is no Procreation Asymmetry Asymmetry. The best explanation of why happy human lives have only weak offsetting weight implies that happy animal lives also have only weak offsetting weight. (shrink)

According to Longtermism, our acts’ expected influence on the expected value of the world is mainly determined by their effects in the far future. There is, given total utilitarianism, a straightforward argument for Longtermism due to the enormous number of people that might exist in the future, but this argument does not work on person-affecting views. In this paper, we will argue that these views might also lead to Longtermism if Prudential Longtermism is true. Prudential Longtermism holds for a person (...) if and only if our acts’ overall influence on that person’s expected well-being is mainly determined by the acts’ effects in the far future. We argue that (due to a small chance of anti-ageing and uploading) there could be an enormous amount of prudential value for some contemporary person in the far future and that value may be so large that it dominates their overall expectation of lifetime well-being. (shrink)

In this paper, I develop an approach to population ethics which explains what we are permitted to do in virtue of the possible complaints against our action. This task is made difficult by a serious problem that arises when we attempt to generalize the view from two-option to many-option cases. The solution makes two significant moves – first, accepting that complaints are essentially pairwise comparative, and second, reimagining decision-making as a tournament between options competing two at a time. The right (...) view about when one option defeats another with respect to complaints, paired with the right view about how to pick the winners of the tournament given the relations of defeat, leads to a uniquely attractive view in the person-affecting tradition. (shrink)

According to an intriguing though somewhat enigmatic line of thought first proposed by Jonathan Bennett, if humanity went extinct any time soon this would be unfortunate because important business would be left unfinished. This line of thought remains largely unexplored. I offer an interpretation of the idea that captures its intuitive appeal, is consistent with plausible constraints, and makes it non-redundant to other views in the literature. The resulting view contrasts with a welfare-promotion perspective, according to which extinction would be (...) bad because it would come at a massive opportunity cost in terms of feasibly achievable welfare over the lifetime of our species. (shrink)

According to axiological retributivism, people can deserve what is bad for them and an outcome in which someone gets what she deserves, even if it is bad for her, can thereby have intrinsic positive value. A question seldom asked is how axiological retributivism should deal with comparisons of outcomes that differ with respect to the number and identities of deserving agents. Attempting to answer this question exposes a problem for axiological retributivism that parallels a well-known problem in population axiology introduced (...) by John Broome. The problem for axiological retributivism is that it supports the existence of a range of negative wellbeing levels such that if a deserving person comes into existence at any of these levels, the resulting outcome is neither better nor worse with respect to desert. However, the existence of such a range is inconsistent with a set of very plausible axiological claims. I call this the desert neutrality paradox. After introducing the paradox, I consider several possible responses to it. I suggest that one reasonable response, though perhaps not the only one, is to reject axiological retributivism. (shrink)

This chapter makes the case for strong longtermism: the claim that, in many situations, impact on the long-run future is the most important feature of our actions. Our case begins with the observation that an astronomical number of people could exist in the aeons to come. Even on conservative estimates, the expected future population is enormous. We then add a moral claim: all the consequences of our actions matter. In particular, the moral importance of what happens does not depend on (...) when it happens. That pushes us toward strong longtermism. We then address a few potential concerns, the first of which is that it is impossible to have any sufficiently predictable influence on the course of the long-run future. We argue that this is not true. Some actions can reasonably be expected to improve humanity’s long-term prospects. These include reducing the risk of human extinction, preventing climate change, guiding the development of artificial intelligence, and investing funds for later use. We end by arguing that these actions are more than just extremely effective ways to do good. Since the benefits of longtermist efforts are large and the personal costs are comparatively small, we are morally required to take up these efforts. (shrink)

This thesis consists of several independent papers in population ethics. I begin in Chapter 1 by critiquing some well-known 'impossibility theorems', which purport to show there can be no intuitively satisfactory population axiology. I identify axiological vagueness as a promising way to escape or at least mitigate the effects of these theorems. In particular, in Chapter 2, I argue that certain of the impossibility theorems have little more dialectical force than sorites arguments do. From these negative arguments I move to (...) positive ones. In Chapter 3, I justify the use of a 'veil of ignorance', starting from three more basic normative principles. This leads to positive arguments for various kinds of utilitarianism - the best such arguments I know. But in general the implications of the veil depend on how one answers what I call 'the risky existential question': what is the value to an individual of a chance of non-existence? I chart out the main options, and raise some puzzles for non-comparativism, the view that life is incomparable to non-existence. Finally, in Chapter 4, I consider the consequences for population ethics of the idea that what is normatively relevant is not personal identity, but a degreed relation of psychological connectedness. In particular, I pursue a strategy based in population ethics for understanding the controversial 'time-relative interests' account of the badness of death. (shrink)

This paper develops a form of moral actualism that can explain the procreative asymmetry. Along the way, it defends and explains the attractive asymmetry: the claim that although an impermissible option can be self-conditionally permissible, a permissible option cannot be self-conditionally impermissible.

This paper develops transfinite extensions of transitivity and acyclicity in the context of population ethics. They are used to argue that it is better to add good lives, worse to add bad lives, and equally good to add neutral lives, where a life's value is understood as personal value. These conclusions rule out a number of theories of population ethics, feed into an argument for the repugnant conclusion, and allow us to reduce different-number comparisons to same-number ones. Challenges to these (...) arguments are addressed, including the issue of comparing existence and non-existence in terms of personal value, the possibility of minimal quanta of time and life, and the meaningfulness of measuring closeness between outcomes with different population sizes. An asymmetry is uncovered between transfinite cycles of worseness and betterness, supporting a version of the weak procreative asymmetry. Transfinite transitivity principles are also favourably compared to the better-known principles of continuity. (shrink)

Suppose you want to do as much good as possible. What should you do? According to members of the effective altruism movement—which has produced much of the thinking on this issue and counts several moral philosophers as its key protagonists—we should prioritise among the world’s problems by assessing their scale, solvability, and neglectedness. Once we’ve done this, the three top priorities, not necessarily in this order, are (1) aiding the world’s poorest people by providing life-saving medical treatments or alleviating poverty (...) itself, (2) preventing global catastrophic risks, such as those posed by nuclear war or rogue artificial intelligence, and (3) ending factory farming. These claims are both plausible and striking. If correct, they should prompt a stark revision of how we approach our altruistic activities. However, the project of determining how to do the most good—as opposed to say, whether we should do the most good—has only recently, within the last ten years, become the subject of serious academic attention. Many key claims have not yet been carefully scrutinised. This is a cause for concern: are effective altruists doing good badly? In this thesis, I critique and develop some of the latest claims about how individuals can do the most good. I do this in three areas: the value of saving lives (preventing premature deaths), how best to improve lives (making people happier during their lives), and cause prioritisation methodology (frameworks for determining which problems are the highest priorities). In each case, I raise novel theoretical considerations that, when incorporated, change the analysis. Roughly speaking, my main conclusions are (1) saving lives is not as straightforwardly good we tend to suppose, may not be good at all, and is not clearly a priority; (2) happiness can be measured through self-reports and, based on the self-reported evidence, treating mental health stands out as an overlooked problem that may be an even more cost-effective way to improve lives than alleviating poverty; (3) the cause prioritisation methodology proposed by effective altruists needs to be moderately reconceptualised and, when it is, it turns out it is not as illuminating a tool as we might have thought and hoped. (shrink)

Animal welfare is a concept that plays a role within both our moral deliberations and the relevant areas of science. The study of animal welfare has impacts on decisions made by legislators, producers and consumers with regards to housing and treatment of animals. Our ethical deliberations in these domains need to consider our impact on animals, and the study of animal welfare provides the information that allows us to make informed decisions. This thesis focusses on taking a philosophical perspective to (...) answer the question of how we can measure the welfare of animals. Animal welfare science is an applied area of biology, aimed at measuring animal welfare. Although philosophy of animal ethics is common, philosophy focussing on animal welfare science is rare. Despite this lack, there are definitely many ways in which philosophical methods can be used to analyse the methodologies and concepts used in this science. One of the aims of the work in this thesis is to remedy this lack of attention in animal welfare. Animal welfare science is a strong emerging discipline, but there is the need for conceptual and methodological clarity and sophistication in this science if it is to play the relevant informative role for our practical and ethical decision-making. There is thus is a strong role here for philosophical analysis for this purpose. The central aim of this thesis is to provide an account of how we can measure subjective animal welfare, addressing some of the potential problems that may arise in this particular scientific endeavour. The two questions I will be answering are: what is animal welfare, and how do we measure it? Part One of the thesis looks at the subjective concept of animal welfare and its applications. In it, I argue for a subjective welfare view - that animal welfare should be understood as the subjective experience of individuals over their lifetimes - and look at how the subjective welfare concept informs our ethical decision-making in two different cases in applied animal ethics. Part Two of the thesis looks more closely at the scientific role of welfare. Understanding welfare subjectively creates unique measurement problems, due to the necessarily private nature of mental states and here I address a few of these problems, including whether subjective experience is measurable, how we might validate indicators of hidden target variables such as welfare, how we can make welfare comparisons between individual animals and how we might compare or integrate the different types of experience that make up welfare. I end with a discussion of the implications of all these problems and solutions for the practice of welfare science, and indicate useful future directions for research. (shrink)

The non-identity problem arises when our actions in the present could change which people will exist in the future, for better or worse. Is it morally better to improve the lives of specific future people, as compared to changing which people exist for the better? Affecting the timing of fetuses being conceived is one case where present actions change the identity of future people. This is relevant to questions of public health policy, as exemplified in some responses to the Zika (...) epidemic. There is philosophical disagreement about the relevance of non-identity: some hold that non-identity is not relevant, while others think that the only morally relevant actions are those that affect specific people. Given this disagreement, we investigated the intuitions about the moral relevance of non-identity within an educated sample of the public, because there was previously little empirical data on the public’s views on the non-identity problem. We performed an online survey with a sample of the educated general public. The survey assessed participants’ preferences between person-affecting and impersonal interventions for Zika, and their views on other non-identity thought experiments, once the non-identity problem had been explained. It aimed to directly measure the importance of non-identity in participants’ moral decision-making. We collected 763 valid responses from the survey. Half of the participants (50%) had a graduate degree, 47% had studied philosophy at a university level, and 20% had read about the non-identity problem before. Most participants favoured person-affecting interventions for Zika over impersonal ones, but the majority claimed that non-identity did not influence their decision (66% of those preferring person-affecting interventions, 95% of those preferring impersonal ones). In one non-identity thought experiment participants were divided, but in another they primarily answered that impersonally reducing the quality of life of future people would be wrong, harmful and blameworthy, even though no specific individuals would be worse off. Non-identity appeared to play a minor role in participants’ moral decision-making. Moreover, participants seem to either misunderstand the non-identity problem, or hold non-counterfactual views of harm that do not define harm as making someone worse off than they would have been otherwise. (shrink)

De-extinction is the process through which extinct species can be brought back into existence. Although these projects have the potential to cause great harm to animal welfare, discussion on issues surrounding de-extinction have focussed primarily on other issues. In this paper, I examine the potential types of welfare harm that can arise through de-extinction programs, including problems with cloning, captive rearing and re-introduction. I argue that welfare harm should be an important consideration when making decisions on de-extinction projects. Though most (...) of the proposed benefits of these projects are insufficient to outweigh the current potential welfare harm, these problems may be overcome with further development of the technology and careful selection of appropriate species as de-extinction candidates. (shrink)

Given the deep disagreement surrounding population axiology, one should remain uncertain about which theory is best. However, this uncertainty need not leave one neutral about which acts are better or worse. We show that, as the number of lives at stake grows, the Expected Moral Value approach to axiological uncertainty systematically pushes one toward choosing the option preferred by the Total View and critical-level views, even if one’s credence in those theories is low.

Despite the recent backlash against epistemic consequentialism, an explicit systematic alternative has yet to emerge. This paper articulates and defends a novel alternative, Epistemic Kantianism, which rests on a requirement of respect for the truth. §1 tackles some preliminaries concerning the proper formulation of the epistemic consequentialism / non-consequentialism divide, explains where Epistemic Kantianism falls in the dialectical landscape, and shows how it can capture what seems attractive about epistemic consequentialism while yielding predictions that are harder for the latter to (...) secure in a principled way. §2 presents Epistemic Kantianism. §3 argues that it is uniquely poised to satisfy the desiderata set out in §1 on an ideal theory of epistemic justification. §4 gives three further arguments, suggesting that it (i) best explains the objective normative significance of the subject's perspective in epistemology, (ii) follows from the kind of axiology needed to solve the swamping problem together with modest assumptions about the relation between the evaluative and the deontic, and (iii) illuminates certain asymmetries in epistemic value and obligation. §5 takes stock and reassesses the score in the debate. (shrink)

It is widely agreed that benevolence is not the whole of the moral life, but it is not as widely appreciated that benevolence is an irreducible part of that life. This paper argues that Kantian efforts to characterize benevolence, or something like it, in terms of reverence for rational agency fall short. Such reverence, while credibly an important part of the moral life, is no more the whole of it than benevolence.

On parity views of mere addition if someone is added to the world at a range of well-being levels – or ‘neutral range’ – leaving existing people unaffected, addition is on a par with the initial situation. Two distinct parity views – ‘rough equality’ and fittingattitudes views – defend the ‘intuition of neutrality’. The first can be interpreted or adjusted so that it can rebut John Broome’s objection that the neutral range is wide. The two views respond in distinct ways (...) to two of Broome’s other objections. Both views can, nonetheless, be plausibly defended against these objections. (shrink)

Values are incommensurable when they cannot be measured on a single cardinal scale. Many philosophers suggest that incommensurability can help us solve the problems of population ethics. I agree. But some philosophers claim that populations bear incommensurable values merely because they contain different numbers of people, perhaps within some range. I argue that mere differences in how many people exist, even within some range, do not suffice for incommensurability. I argue that the intuitive neutrality of creating happy people is better (...) captured by a version of average utilitarianism. But this view is problematic. So I suggest a version of total utilitarianism that avoids the repugnant conclusion by appealing to incommensurable dimensions of wellbeing. (shrink)

Rights-based approaches and consequentialist approaches to ethics are often seen as being diametrically opposed to one another. In one sense, they are. In another sense, however, they can be reconciled: a ‘global’ form of consequentialism might supply consequentialist foundations for a derivative morality that is non-consequentialist, and perhaps rights-based, in content. By way of case study to illustrate how this might work, I survey what a global consequentialist should think about a recent dispute between Jeff McMahan and Henry Shue on (...) the morality and laws of war. (shrink)

Population axiology is the study of the conditions under which one state of affairs is better than another, when the states of affairs in ques- tion may differ over the numbers and the identities of the persons who ever live. Extant theories include totalism, averagism, variable value theories, critical level theories, and “person-affecting” theories. Each of these the- ories is open to objections that are at least prima facie serious. A series of impossibility theorems shows that this is no coincidence: (...) it can be proved, for various sets of prima facie intuitively compelling desiderata, that no axiology can simultaneously satisfy all the desiderata on the list. One’s choice of population axiology appears to be a choice of which intuition one is least unwilling to give up. (shrink)

This article argues for the elimination of the concept of life worth living from philosophical vocabulary on three complementary grounds. First, the basic components of this concept suffer from multiple ambiguities, which hamper attempts to ground informative evaluative and classificatory judgments about the worth of life. Second, the criteria proposed to track the extension of the concept of life worth living rest on unsupported axiological assumptions and fail to identify precise and plausible referents for this concept. And third, the concept (...) of life worth living is not shown to serve any major evaluative or classificatory purpose besides those served by already available axiological concepts. By eliminating the concept of life worth living, philosophers will free themselves of the task of addressing ill-posed axiological questions and ground reflection about the worth of life on more rigorous conceptual foundations. (shrink)

Utilitarianism seems to be going out of fashion, amidst increasing concerns for issues of freedom, equality, and justice. At least, anti-utilitarian and non-utilitarian moral philosophers have been very active. This paper is a very modest attempt to defend utilitarianism in particular and welfarism in general. Section I provides an axiomatic defence of welfarism and utilitarianism. Section II discusses the divergences between individual preferences and individual welfares and argues in favour of welfare utilitarianism. Section III criticizes some non-utilitarian principles, including knowledge (...) as intrinsically good, rights-based ethics, and Rawls's second principle. Section IV argues that most objections to welfarism are probably based on the confusion of non-ultimate considerations with basic values. This is discussed with reference to some recent philosophical writings which abound with such confusion. Section V argues that the acceptance of utilitarianism may be facilitated by the distinction between ideal morality and self-interest which also resolves the dilemma of average versus total utility maximization in optimal population theory. (shrink)

In this essay I describe how contractarianism might approach interspecies welfare conflicts. I start by discussing a contractarian account of the moral status of nonhuman animals. I argue that contractors can agree to norms that would acknowledge the “moral standing” of some animals. I then discuss how the norms emerging from contractarian agreement might constrain any comparison of welfare between humans and animals. Contractarian agreement is likely to express some partiality to humans in a way that discounts the welfare of (...) some or all animals. While the norms emerging from the contract might be silent or inconsistent in some tragic or catastrophic cases, in most ordinary conflicts of welfare, contractors will agree to norms that produce some determinate resolution. What the agreement says can evolve depending upon how the contractors or the circumstances change. I close with some remarks on contractarian indeterminacy. (shrink)

We should seek to justify, from a moral perspective, policies associated with serious and irreversible risks to the health of human beings, their societies, and the environment for these risks may have great impacts on the autonomy of both existing and future persons. The ideal of discursive democracy provides a way of morally justifying such policies to both existing and future persons. It calls for the inclusive, informed, and uncoerced deliberation toward an agreement of both existing and future persons, which (...) can serve as a justificatory basis for such public policies. This agreement best protects their fundamental interests and basic needs, and garners their general acceptance. It does so by upholding their agency in decision-making processes and, more specifically, by counseling a maxim of precaution in their public reasoning. The aim of this maxim is to protect the social and environmental conditions that will enable members of existing and future generations to review and, if necessary, revise decisions made in the past but that impact upon them in the present. Precautionary public reasoning thus serves to uphold the decisional agency of existing and future persons, which is a necessary condition of their democratic involvement in the policies that affect them and thus of their autonomous existence defined by their conceptions of the good. (shrink)

Two related asymmetries have been discussed in relation to the ethics of creating new lives: First, we seem to have strong moral reason to avoid creating lives that are not worth living, but no moral reason to create lives that are worth living. Second, we seem to have strong moral reason to improve the wellbeing of existing lives, but, again, no moral reason to create lives that are worth living. Both asymmetries have proven very difficult to account for in any (...) coherent moral framework. I propose an impersonal population axiology to underpin the asymmetries, which sidesteps the problematic issue of whether or not people can be harmed or benefited by creation or non-creation. This axiology yields perfect asymmetry from a deliberative perspective, in terms of expected value. The axiology also yields substantial asymmetry for large and realistic populations in terms of their actual value, beyond deliberative relevance. (shrink)

Recently, in his Rolf Schock Prize Lecture, Derek Parfit has suggested a novel way of avoiding the Repugnant Conclusion by introducing what he calls “imprecision” in value comparisons. He suggests that in a range of important cases, populations of different sizes are only imprecisely comparable. Parfit suggests that this feature of value comparisons opens up a way of avoiding the Repugnant Conclusion without implying other counterintuitive conclusions, and thus solves one of the major challenges in ethics. In this article, I (...) try to clarify Parfit's proposal and evaluate whether it will help us with the paradoxes in population ethics. (shrink)

This thesis in an invistigation into the concept of "harm" and its moral relevance. A common view is that an analysis of harm should include a counterfactual condition: an act harms a person iff it makes that person worse off. A common objection to the moral relevance of harm, thus understood, is the non-identity problem. -/- This thesis criticises the counterfactual condition, argues for an alternative analysis and that harm plays two important normative roles. -/- The main ground for rejecting (...) the counterfactual condition is that it has unacceptable consequences in cases of overdetermination and pre-emption. Several modifications to the condition are considered but all fail to solve this problem. -/- According to the alternative analysis to do harm is to perform an act which is responsible for the obtaining of a state of affairs which makes a person’s life go worse. It is argued that should be understood in terms of counterfactual dependence. This claim is defended against counterexamples based on redundant causation. An analysis of is also provided using the notion of a well-being function. It is argued that by introducing this notion it is possible to analyse contributive value without making use of counterfactual comparisons and to solve the non-identity problem. -/- Regarding the normative importance of harm, a popular intuition is that there is an asymmetry in our obligations to future people: that a person would have a life worth living were she to exist is not a reason in favour of creating that person while that a person would have a life not worth living is a reason against creating that person. It is argued that the asymmetry can be classified as a moral option grounded in autonomy. Central to this defence is the suggestion that harm is relevant to understanding autonomy. Autonomy involves partly the freedom to pursue one’s own aims as long as one does no harm. (shrink)

-/- I start from three premises, roughly as follows: (1) that if possible world x is better than world y for every individual who exists in either world, then x is better than y; (2) that if x has a higher average utility, a higher total utility, and no more inequality than y, then x is better than y; (3) that better than is transitive. From these premises, it follows that benefits given to the worse off contribute no more to (...) the world’s value than equal-sized benefits given to the better off. (shrink)

A common intuition is that there is a moral difference between ‘making people happy’ and ‘making happy people.’ This intuition, often referred to as ‘the Asymmetry,’ has, however, been criticized on the grounds that it is incoherent. Why is there, for instance, not a corresponding difference between ‘making people unhappy’ and ‘making unhappy people’? I argue that the intuition faces several difficulties but that these can be met by introducing a certain kind of reason that is favouring but non-requiring. It (...) is argued that there are structural similarities between the asymmetry and moral options and that the asymmetry can be defended as an instance of a moral option. (shrink)