Challenging, with several powerful arguments, some of our deepest beliefs about rationality, morality, and personal identity, Parfit claims that we have a false view about our own nature. It is often rational to act against our own best interersts, he argues, and most of us have moral views that are self-defeating. We often act wrongly, although we know there will be no one with serious grounds for complaint, and when we consider future generations it is very hard to avoid conclusions (...) that most of us will find very disturbing. (shrink)

We investigate the value of persons. Our primary goal is to chart a path from equal and extreme value to infinite value. We advance two arguments. Each argument offers a reason to think that equal and extreme value are best accounted for if we are infinitely valuable. We then raise some difficult but fruitful questions about the possible grounds or sources of our infinite value, if we indeed have such value.

Parfit's requirements for an ideal Theory X cannot be fully met since the Mere Addition Principle and Non-Antiegalitarianism imply the Repugnant Conclusion: Theory X does not exist. However, since the Repugnant Conclusion is really compelling, the Impersonal Total Principle should be adopted for impartial comparisons concerning future generations. Nevertheless, where our own interests are affected, we may yet choose to be partial, trading off our concern for future goodness with our self-interests. Theory X' meets all Parfit's requirements except the Mere (...) Addition Principle in less compelling cases. (shrink)

Act Utilitarianisms divide into Total and Average versions. Total versions seem to imply Parfit’s “Repugnant Conclusion”. Average versions are proposed in part to avoid the Repugnant Conclusion, but these are subject to “Mere Addition” arguments as detailed by Hudson in “The Diminishing Marginal Value of Happy People”. Thus, various intermediate versions of utilitarianism, such as the one investigated by Hurka in “Value and Population Size”, take on interest. But Hudson argues that such compromise theories are subject to the mere addition (...) arguments, and are therefore no improvement over Average Utilitarianism. I disagree: some such compromise solutions escape Hudson’s Mere Addition arguments. (shrink)

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)

Invariabilism is the view that the same theory of welfare is true of every welfare subject. Variabilism is the view that invariabilism is false. In light of how many welfare subjects there are and how greatly they differ in their natures and capacities, it is natural to suppose that variabilism is true. I argue that these considerations do not support variabilism and, indeed, that we should accept invariabilism. This has important implications: it eliminates many of the going theories of welfare (...) while making some of the remaining ones more attractive. (shrink)

Most of the reports on synthetic biology include not only familiar topics like biosafety and biosecurity but also a chapter on ‘ethical concerns’; a variety of diffuse topics that are interrelated in some way or another. This article deals with these ‘ethical concerns’. In particular it addresses issues such as the intrinsic value of life and how to deal with ‘artificial life’, and the fear that synthetic biologists are tampering with nature or playing God. Its aim is to analyse what (...) exactly is the nature of the concerns and what rationale may lie behind them. The analysis concludes that the above-mentioned worries do not give genuine cause for serious concern. In the best possible way they are interpreted as slippery slope arguments, yet arguments of this type need to be handled with care. It is argued that although we are urged to be especially vigilant we do not have sufficiently cogent reasons to assume that synthetic biology will cause such fundamental hazards as to warrant restricting or refraining from research in this field. (shrink)

Is consciousness intrinsically valuable? Some theorists favor the positive view, according to which consciousness itself accrues intrinsic value, independent of the particular kind of experience instantiated. In contrast, I favor the neutral view, according to which consciousness is neither intrinsically valuable nor disvaluable. The primary purpose of this paper is to clarify what is at stake when we ask whether consciousness is intrinsically valuable, to carve out the theoretical space, and to evaluate the question rigorously. Along the way, I also (...) show why the neutral view is attractive and why certain arguments for the positive view do not work. (shrink)

Recent work within such disparate research areas as the epistemology of perception, theories of well-being, animal and medical ethics, the philosophy of consciousness, and theories of understanding in philosophy of science and epistemology has featured disconnected discussions of what is arguably a single underlying question: What is the value of consciousness? The purpose of this paper is to review some of this work and place it within a unified theoretical framework that makes contributions (and contributors) from these disparate areas more (...) visible to one another. (shrink)

There is one thing we can be sure of: we are all going to die. But once we accept that fact, the questions begin. In this thought-provoking book, philosophy professor Shelly Kagan examines the myriad questions that arise when we confront the meaning of mortality. Do we have reason to believe in the existence of immortal souls? Or should we accept an account according to which people are just material objects, nothing more? Can we make sense of the idea of (...) surviving the death of one’s body? If I won’t exist after I die, can death truly be _bad_ for me? Would immortality be desirable? Is fear of death appropriate? Is suicide ever justified? How should I _live_ in the face of death? Written in an informal and conversational style, this stimulating and provocative book challenges many widely held views about death, as it invites the reader to take a fresh look at one of the central features of the human condition—the fact that we will die. (shrink)

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)

Book reviewed in this article: Down the Slippery Slope: Arguing in Applied Ethics. By David Lamb.

Expanding on the theory of ethics first posited by Brentano in The Origin of our Knowledge of Right and Wrong this re-issued work, first published posthumously in 1952, is based on series of lectures on practical philosophy, given at the university of Vienna from 1876 to 1894. The English-speaking reader will find it interesting to examine the step-by-step development of Brentano’s ethical theory, his extensive critique of British moral philosophers, and his unusually detailed section on casuistry.

Suppose that A and B are two kinds of goods such that more of each is better than less. A is strongly superior to B if any amount of A is better than any amount of B. It is weakly superior to B if some amount of A is better than any amount of B. There are many examples of these relations in the literature, sometimes under the labels “higher goods” and “discontinuity.” The chapter gives a precise and generalized statement (...) of Strong and Weak Superiority and discusses different ways in which these relations can be relevant to the aggregation of welfare. It also proves a number of general results. One of the results gives rise to a dilemma: It can be used as an argument against the existence of value superiority or, alternatively, as an argument against the view that superiority entails a radical difference in value. (shrink)

A search is under way for a theory that can accommodate our intuitions in population axiology. The object of this search has proved elusive. This is not surprising since, as we shall see, any welfarist axiology that satisfies three reasonable conditions implies at least one of three counter-intuitive conclusions. I shall start by pointing out the failures in three recent attempts to construct an acceptable population axiology. I shall then present an impossibility theorem and conclude with a short discussion of (...) how it might be extended to pluralist axiologies, that is, axiologies that take more values than welfare into account. (shrink)

A `slippery slope' argument in medical ethics is one that opposes itself to a new proposal on the grounds that it is not _per se_ intolerable but will lead to a situation that is. Lamb evaluates such arguments, demonstrating their centrality to the subject.

A `slippery slope' argument in medical ethics is one that opposes itself to a new proposal on the grounds that it is not _per se_ intolerable but will lead to a situation that is. Lamb evaluates such arguments, demonstrating their centrality to the subject.

Are bacteriophage T4 and the long-nosed elephant fish valuable in their own right? Nicholas Agar defends an affirmative answer to this question by arguing that anything living is intrinsically valuable. This claim challenges received ethical wisdom according to which only human beings are valuable in themselves. The resulting biocentric or life-centered morality forms the platform for an ethic of the environment. -/- Agar builds a bridge between the biological sciences and what he calls "folk" morality to arrive at a workable (...) environmental ethic and a new spectrum--a new hierarchy--of living organisms. The book overturns common-sense moral belief as well as centuries of philosophical speculation on the exclusive moral significance of humans. Spanning several fields, including philosophy of psychology, philosophy of science, and other areas of contemporary analytic philosophy, Agar analyzes and speaks to a wide array of historic and contemporary views, from Aristotle and Kant, to E. O. Wilson, Holmes Rolston II, and Baird Callicot. The result is a challenge to prevailing definitions of value and a call for a scientifically-informed appreciation of nature. (shrink)

A `slippery slope' argument in medical ethics is one that opposes itself to a new proposal on the grounds that it is not per se intolerable but will lead to a situation that is. Lamb evaluates such arguments, demonstrating their centrality to the subject.

Mill was one of the most important British philosophers of the nineteenth century; his _Utilitarianism_ is a pivotal work in ethical thought. This book, written specifically for students coming to Mill - and perhaps philosophy - for the first time, will be an ideal guide. _Mill on Utilitarianism_ introduces and assesses: * Mill's life and the background of _Utilitarianism_ * the ideas and text of _Utilitarianism_ * the continuing importance of Mill's work to philosophy This is the first book dedicated (...) to _Utilitarianism_ itself. Concisely written and engaging, it is perfect reading for those studying Mill or moral philosophy. (shrink)