The most common argument against negative utilitarianism is the world destruction argument, according to which negative utilitarianism implies that if someone could kill everyone or destroy the world, it would be her duty to do so. Those making the argument often endorse some other form of consequentialism, usually traditional utilitarianism. It has been assumed that negative utilitarianism is less plausible than such other theories partly because of the world destruction argument. So, it is thought, someone who finds theories in the (...) spirit of utilitarianism attractive should not go for negative utilitarianism, but should instead pick traditional utilitarianism or some other similar theory such as prioritarianism. I argue that this is a mistake. The world destruction argument is not a reason to reject negative utilitarianism in favour of these other forms of consequentialism, because there are similar arguments against such theories that are at least as persuasive as the world destruction argument is against negative utilitarianism. (shrink)

Jeff McMahan appeals to what he calls the “Time-relative Interest Account of the Wrongness of Killing ” to explain the wrongness of killing individuals who are conscious but not autonomous. On this account, the wrongness of such killing depends on the victim’s interest in his or her future, and this interest, in turn, depends on two things: the goods that would have accrued to the victim in the future; and the strength of the prudential relations obtaining between the victim at (...) the time of the killing and at the times these goods would have accrued to him or her. More precisely, when assessing this interest, future goods should be discounted to reflect reductions in the strength of such relations. Against McMahan’s account I argue that it relies on an implausible “actualist” view of the moral importance of interests according to which satisfactions of future interests only have moral significance if they are satisfactions of actual interests. More precisely, I aim to show that the Time-relative Interest Account does not have the implications for the morality of killing that McMahan takes it to have, and implies, implausibly, that certain interest satisfactions which seem to be morally significant are morally insignificant because they are not satisfactions of actual interests. (shrink)

We know that Homo sapiens will not exist forever. Given this, how should our species end? What are the reasons, if any, to delay our extinction? In this paper, I show that the pre-eminent reasons which favour prolonging the existence of the species are partial: they will arise from the particular attachments and projects of the final few generations. While there may also be impartial reasons to prolong the species, these reasons are liable, with time, to reverse their valence: we (...) can be reasonably confident that they will ultimately recommend hastening the demise of the species. Consequently, it is likely that our descendants will eventually face a difficult -- possibly tragic -- conflict, between partial duties that recommend living on, and an impartial duty to extinguish the species. (shrink)

It is sometimes argued that if God were to exist, then the actual world would be the best possible world. However, given that the actual world is clearly not the best possible world, then God doesn’t exist. In response, some have argued that the world could always be improved with the creation of new people and that there is thus no best possible world. I argue that this reasoning gives rise to an instance of Parfit’s mere addition paradox and should (...) thus be rejected. Others (Robert Adams, in particular) have argued that the actual world may, in fact, be the best possible world, at least for all actual people. I argue that this reasoning gives rise to Parfit’s non-identity problem and should thus be rejected. (shrink)

Philosophical discussions of prioritarianism, the view that we ought to give priority to those who are worse off, have hitherto been almost exclusively focused on cases involving a fixed population. The aim of this paper is to extend the discussion of prioritarianism to encompass also variable populations. I argue that prioritarianism, in its simplest formulation, is not tenable in this area. However, I also propose several revised formulations that, so I argue, show more promise.

In Better Never to Have Been: The Harm of Coming into Existence, I argued that coming into existence is always a harm and that procreation is wrong. In this paper, I respond to those of my critics to whom I have not previously responded. More specifically, I engage the objections of Tim Bayne, Ben Bradley, Campbell Brown, David DeGrazia, Elizabeth Harman, Chris Kaposy, Joseph Packer and Saul Smilansky.

The core idea of secular Buddhism is to grasp the spirit of early Buddhism and transpose it into the present. An application of this idea to the doctrine of rebirth leads to the following result: -/- The doctrine of rebirth cannot be revised in a strict sense, but there are some striking similarities between the ancient and modern (biological) view on the topic. Since the stream of genetic and epigenetic information has the power to create consciousness and reflects experiences of (...) past lives, it can be associated with the stream of consciousness (cittasantana) in the Mahayana model of rebirth. Parents not only determine the genetic constitution of their children, but they also transfer character traits by means of epigenetic heredity. If genetic inheritance is associated with karma, then genes become an element of synchronic and diachronic connectedness (pratitya-samutpada). Instead of an individual learning process across successive lives, there is a collective learning process across successive generations. -/- Given the biological model of rebirth, the belief in cosmic justice turns into a quest for mundane justice. There is a thought experiment for constructing such a concept, which complies well with the secular Buddhist spirit. John Rawls assumes that the legislative deliberation is taking place “behind a veil of ignorance”, so that the participants of the deliberation do not know their future genetic constitution and their future position within the society. If the participants imagine that their future self is contingent and impermanent – in accordance with the Buddhist doctrine of anatta and anitya – then the resulting principles of justice will be impartial. (shrink)

Various authors suggested that Buddhism may be a kind of negative utilitarianism. A closer examination of the corresponding intuitions leads to the following result: - Negative utilitarianism, understood as an umbrella term, models the asymmetry between suffering and happiness and therefore accords with the Buddhist intuition of universal compassion. - The Noble Truths of Buddhism accord with the negative utilitarian intuition that (global) suffering cannot be compensated by happiness. - Some forms of Buddhism and negative utilitarianism share the intuition that (...) non-existence is a perfect state. (shrink)

Most discussion in population ethics has concentrated how to order populations by the relations “is better than” and “is as good as”. The topic is characterized by paradoxes which show that our considered beliefs are inconsistent in cases where the number of people and their welfare varies. The best known and most discussed example shattering our intuitions is Parfit’s Mere Addition Paradox. But why are paradoxes prevalent in population ethics? Can the analysis of Buddhist intuitions contribute to answer this question? (...) -/- The comparison of classical utilitarian and Buddhist intuitions demonstrates the close tie between intuitions and interests. The perplexing Buddhist intuition about non-existence can be explained (except for metaphysical reasons) by a radically different priority given to survival. -/- The method of measuring the quality of life is not decisive for the existence of paradoxes. The Buddhist axiology changes but doesn’t remove counter-intuitive combinations. -/- If the conflict of interest (quantity versus quality) is described within a two-parameter model, it causes conflicting intuitions. In axiologies which favour quantity (utilitarianism) or quality (perfectionism) the conflicting intuitions inevitably lead to paradoxes. -/- In order to find a compromise, one would have to find a universal interest and a corresponding universal intuition. The obvious candidate to meet this request is sympathy. But since there is no universal consensus on the desirable degree of sympathy, the normative force of such an approach is limited. -/- Breaking out of the two-parameter model and accepting the incommensurability of certain qualities threatens the normative claim of population ethics. (shrink)

Desire theories of well-being claim that how well someone’s life goes for them is entirely determined by the fulfilment and frustration of their desires. This thesis considers the viability of theories of this sort. It examines a series of objections that threaten to undermine these views. These objections claim that desire theories of well-being are incorrect because they have implausible implications. I consider four main objections over the course of this thesis. The first claims that these theories are incorrect because (...) they implausibly entail that self-sacrifice does not exist. The second claims that these theories are incorrect because they implausibly entail that severe depression does not diminish the well-being of those afflicted by this condition. The third claims that these theories are incorrect because they have implausible implications about the relative importance of fleeting desires, long-standing desires, and fluctuations in desire strength to well-being. The fourth claims that these theories are incorrect because they fail to capture the intuition that desire fulfilments which leave us disappointed and bereft of feelings of satisfaction do not improve well-being. In each of these cases, I find that desire theories of well-being have sufficient resources to refute these objections. The primary finding of this thesis is that many of the arguments against desire theories of well-being are unsuccessful. A secondary set of findings concern observations about the structure of human psychology. (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)

This thesis consists of a series of papers in population ethics: a subfield of normative ethics concerned with the distinctive issues that arise in cases where our actions can affect the identities or number of people of who ever exist. Each paper can be read independently of the others. In Chapter 1, I present a dilemma for Archimedean views in population axiology: roughly, those views on which adding enough good lives to a population can make that population better than any (...) other. In Chapter 2, I extend Gustaf Arrhenius’s famous impossibility theorems in population axiology into the domain of choices under risk. My risky impossibility theorems dispense with the assumption that welfare levels are finitely fine-grained, and so tell against lexical views in population axiology. In Chapter 3, I present objections to critical-level and critical-range views in population axiology. I then sketch out what I call the ‘Imprecise Exchange Rates View’ and argue that it is an attractive alternative. In Chapter 4, I address critical-level and critical-range views again. This time, I note that they are vulnerable to objections from biographical identity: identity between lives. I suggest that these objections give us reason to reject critical-level and critical-range views and embrace the Total View. In Chapter 5, I argue that objections of the same form – objections from personal identity – tell against person-affecting views in population ethics. In Chapter 6, I draw out some counterintuitive implications of two recent complaints-based theories of the procreation asymmetry. (shrink)

En este artículo se explica en qué consisten las éticas centradas en el sufrimiento, presenta algunas de las principales razones a su favor y expone cuáles son sus implicaciones con respecto a la consideración moral de los animales. Se argumenta que conforme a estas éticas los usos como recursos de los animales lesivos para estos deberán ser rechazados. A continuación, se examinan las posiciones que aceptan el uso de los animales siempre que este tenga lugar reduciendo los daños infligidos a (...) estos. Se presentarán una serie de razones por las que tales posiciones resultan cuestionables y por las que van a entrar en conflicto con las implicaciones de las éticas centradas en el sufrimiento. (shrink)

Discussions about the possible consequences of creating superintelligence have included the possibility of existential risk, often understood mainly as the risk of human extinction. We argue that suffering risks (s-risks) , where an adverse outcome would bring about severe suffering on an astronomical scale, are risks of a comparable severity and probability as risks of extinction. Preventing them is the common interest of many different value systems. Furthermore, we argue that in the same way as superintelligent AI both contributes to (...) existential risk but can also help prevent it, superintelligent AI can both be a suffering risk or help avoid it. Some types of work aimed at making superintelligent AI safe will also help prevent suffering risks, and there may also be a class of safeguards for AI that helps specifically against s-risks. (shrink)

For many philosophers working in the area of Population Ethics, it seems that either they have to confront the Repugnant Conclusion , or they have to confront the Non-Identity Problem . To them it seems there is no escape, they either have to face one problem or the other. However, there is a way around this, allowing us to escape the Repugnant Conclusion, by using what I will call Negative Average Preference Utilitarianism – which though similar to anti-frustrationism, has some (...) important differences in practice. Current “positive” forms of utilitarianism have struggled to deal with the Repugnant Conclusion, as their theory actually entails this conclusion; however, it seems that a form of Negative Average Preference Utilitarianism easily escapes this dilemma. (shrink)