Many of the existing ethical analyses of genetic engineering technologies (GET) focus on how they can be used to enhance individuals—to improve individual well-being, health and cognition. There is a gap in the current literature about the specific ways enhancement technologies could be used to improve our populations and species, viewed as a whole. In this paper, I explore how GET may be used to enhance the species through improvements in the gene pool. I argue one aspect of the species (...) that may be desirable to enhance is ‘persistence’ or long-term viability. I then look at some of the ways in which GET could be used to improve human persistence and argue that the use of GET to secure benefits for individuals may compromise persistence. This suggests conflicts between uses of GET to enhance individuals and uses to promote the persistence of the species may occur. As GET are further developed, the likelihood that these conflicts will actually arise, and how we should resolve them if they do, will need to be considered. (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)

Theories of well-being tell us what makes a life good for the one who lives it. But there is more to what makes a life worth living than just well-being. We care about the worth of our lives, and we are right to do so. I defend an objective list theory of the worth of a life: The most worthwhile lives are those high in various objective goods. These principally include welfare and meaning. By distinguishing between worth and welfare, we (...) can capture the intuitive pull of broad theories of welfare without their liabilities. (shrink)

David Benatar argues that being brought into existence is always a net harm and never a benefit. I disagree. I argue that if you bring someone into existence who lives a life worth living, then you have not all things considered wronged her. Lives are worth living if they are high in various objective goods and low in objective bads. These lives constitute a net benefit. In contrast, lives worth avoiding constitute a net harm. Lives worth avoiding are net high (...) in objective bads and low in objective goods. It is the prospect of a LWA that gives us good reason to not bring someone into existence. Happily, many lives are not worth avoiding. Contra Benatar, many are indeed worth living. Even if we grant Benatar his controversial asymmetry thesis, we have no reason to think that coming into existence is always a net harm. (shrink)

A very common but untested assumption is that potential children would consent to be exposed to the harms of existence in order to experience its benefits. And so, would-be parents might appeal to the following view: Procreation is all-things-considered permissible, as it is morally acceptable for one to knowingly harm an unconsenting patient if one has good reasons for assuming her hypothetical consent—and procreators can indeed reasonably rely on some notion of hypothetical consent. I argue that this view is in (...) error. My argument appeals to a consent-based version of anti-natalism advanced by Seana Valentine Shiffrin. Anti-natalism is the view that it is always wrong to bring people into existence. While, like Shiffrin, I stop short of advocating a thoroughgoing anti-natalism, I nevertheless argue that procreators cannot appeal to hypothetical consent to justify exposing children to the harms of existence. I end by suggesting a more promising route by which this justification might be achieved. (shrink)

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.

This paper considers the problems that arise when death, which is a philosophically difficult concept, is incorporated into healthcare metrics, such as the quality-adjusted life year (QALY). These problems relate closely to the debate over euthanasia and assisted suicide because negative QALY scores can be taken to mean that patients would be ‘better off dead’. There is confusion in the literature about the meaning of 0 QALY, which is supposed to act as an ‘anchor’ for the surveyed preferences on which (...) QALYs are based. In the context of the debate over euthanasia, the QALY assumes an ability to make meaningful comparisons between life-states and death. Not only is this assumption questionable, but the ethical debate is much more broad than the question of whether death is preferable to a state of living. QALYs are derived from preferences about health states, so do not necessarily reflect preferences about events (eg, dying) or actions (eg, killing). This paper presents a new kind of problem for the QALY. As it stands, the QALY provides confused and unreliable information when it reports zero or negative values, and faces further problems when it appears to recommend death. This should preclude its use in the debate over euthanasia and assisted suicide. These problems only apply where the QALY involves or seems to involve a comparison between life-states and death, and are not relevant to the more general discussion of the use of QALYs as a tool for comparing the benefits derived from treatment options. (shrink)

In this paper we distinguish two versions of the non-identity problem: one involving positive well-being and one involving negative well-being. Intuitively, there seems to be a difference between the two versions of the problem. In the negative case it is clear that one ought to cause the better off person to exist. However, it has recently been suggested that this is not so in the positive case. We argue that such an asymmetrical treatment of the two versions should be rejected (...) and that this is evidence against views according to which it is permissible to cause the less well off person to exist in the positive non-identity case. (shrink)