This study uses techniques from economics to illuminate fundamental questions in ethics, particularly in the foundations of utilitarianism. Topics considered include the nature of teleological ethics, the foundations of decision theory, the value of equality and the moral significance of a person's continuing identity through time.

In an intriguing essay, G. A. Cohen has defended a conservative bias in favour of existing value. In this paper, we consider whether Cohen’s conservatism raises a new challenge to the use of human enhancement technologies. We develop some of Cohen’s suggestive remarks into a new line of argument against human enhancement that, we believe, is in several ways superior to existing objections. However, we shall argue that on closer inspection, Cohen’s conservatism fails to offer grounds for a strong sweeping (...) objection to enhancement, and may even offer positive support for forms of enhancement that preserve valuable features of human beings. Nevertheless, we concede that Cohen’s arguments may suggest some plausible and important constraints on the modality of legitimate and desirable enhancements. (shrink)

Though the revised edition of A Theory of Justice, published in 1999, is the definitive statement of Rawls's view, so much of the extensive literature on Rawls's theory refers to the first edition.

Temkin's book is a very original and deeply unsettling work of skeptical philosophy that mounts an important new challenge to contemporary ethics.

One of the most important disputes in the foundations of ethics concerns the source of practical reasons. On the desire-based view, only one’s desires provide one with reasons to act. On the value-based view, reasons are instead provided by the objective evaluative facts, and never by our desires. Similarly, there are desire-based and non-desired-based theories about two other phenomena: pleasure and welfare. It has been argued, and is natural to think, that holding a desire-based theory about either pleasure or welfare (...) commits one to recognizing that desires do provide reasons for action – i.e., commits one to abandoning the value-based theory of reasons. The purpose of this paper is to show that this is not so. All of the following can be true: pleasure and welfare provide reasons; pleasure and welfare are to be understood in terms of desire; desires never provide reasons, in the relevant way. (shrink)

Philosophers have come to distinguish between ‘right’ and ‘wrong’ kinds of reasons for belief, intention, and other attitudes. Several theories about the nature of this distinction have been offered, by far the most prevalent of which is the idea that it is, at bottom, the distinction between what are known as ‘object-given’ and ‘state-given’ reasons. This paper argues that the object-given/state-given theory vastly overgeneralizes on a small set of data points, and in particular that any adequate account of the distinction (...) between the ‘right’ and ‘wrong’ kinds of reason must allow state-given reasons to be of the right kind. The paper has three main goals, corresponding to its three main parts. In part 1 I set up the problem by introducing the right-kind/wrong-kind distinction, the object-given/state-given distinction, and the object-given/state-given theory, according to which the former distinction simply amounts to the latter. Part 2 presents the main argument of the paper: I argue against the object-given/state-given theory by showing that all of the earmarks of the ‘right’ and ‘wrong’ kinds of reason apply to reasons not to intend and not to believe, but that these cases can’t be captured by the object-given/state-given theory. Finally, in part 3 I use these arguments to motivate and explore a more general hypothesis about the rightkind/wrong-kind distinction, and explore some of the consequences of rejecting the object-given/stategiven theory. (shrink)

This book offers a systematic treatment of the requirements of democratic legitimacy. It argues that democratic procedures are essential for political legitimacy because of the need to respect value pluralism and because of the learning process that democratic decision-making enables. It proposes a framework for distinguishing among the different ways in which the requirements of democratic legitimacy have been interpreted. Peter then uses this framework to identify and defend what appears as the most plausible conception of democratic legitimacy. According to (...) this conception, democratic legitimacy requires that the decision-making process satisfies certain conditions of political and epistemic fairness. (shrink)

Preferences play a role in well-being that is difficult to escape, but whatever authority one grants to preferences, their malleability seems to cause problems for any theory of well-being that employs them. Most importantly, preferences appear to display a status-quo bias: people come to prefer what they are likely rather than unlikely to get. I try to do two things here. The first is to provide a more precise characterization of the status-quo bias, how it functions, and how it infects (...) commonly accepted theories of well-being. The second is to give an alternative characterization of an agent's preferences that succeeds in avoiding the status-quo bias. (shrink)

If you are more likely to continue a course of action in virtue of having previously invested in that course of action, then you tend to honor sunk costs. It is widely thought both that (i) individuals often do give some weight to sunk costs in their decision-making and that (ii) it is irrational for them to do so. In this paper I attempt to cast doubt on the conventional wisdom about sunk costs, understood as the conjunction of these two (...) claims. (shrink)

Suppose that we develop a medically safe and affordable means of enhancing human intelligence. For concreteness, we shall assume that the technology is genetic engineering (either somatic or germ line), although the argument we will present does not depend on the technological implementation. For simplicity, we shall speak of enhancing “intelligence” or “cognitive capacity,” but we do not presuppose that intelligence is best conceived of as a unitary attribute. Our considerations could be applied to specific cognitive abilities such as verbal (...) fluency, memory, abstract reasoning, social intelligence, spatial cognition, numerical ability, or musical talent. It will emerge that the form of argument that we use can be applied much more generally to help assess other kinds of enhancement technologies as well as other kinds of reform. However, to give a detailed illustration of how the argument form works, we will focus on the prospect of cognitive enhancement. (shrink)

It is often assumed that there is a necessary relationship between historical value and irreplaceability, and that this is an essential feature of historical value’s distinctive character. Contrary to this assumption, I argue that it is a merely contingent fact that some historically valuable things are irreplaceable, and that irreplaceability is not a distinctive feature of historical value at all. Rather, historically significant objects, from heirlooms to artifacts, offer us an otherwise impossible connection with the past, a value that persists (...) even in the face of suitable replacements. (shrink)

Some writers have noted that valuation is often focused on foreseen changes. They say that we often don't value situations in terms of what we would have in them only but also in terms of the gains or losses that they offer us — that we then focus on departures from our status quo. They argue that such thinking conflicts with basic economic analysis, and also that it violates logic: they say that it is irrational. I agree that it seems (...) to be common. But is such a way of setting one's values a challenge to economics? And does it conflict with being rational? (shrink)

In On What Matters Derek Parfit argues that facts about reasons for action are grounded in facts about values and against the view that they are grounded in facts about the desires that subjects would have after fully informed and rational deliberation. I describe and evaluate Parfit's arguments for this value-based conception of reasons for action and find them wanting. I also assess his response to Sidgwick's suggestion that there is a Dualism of Practical Reason. Parfit seems not to notice (...) that his preferred value-based conception of reasons for action augurs strongly in favour of a view like Sidgwick's. 1. (shrink)

We use “I’ll be glad I did it” reasoning all the time. For example, last night I was trying to decide whether to work on this paper or go out to a movie. I realized that if I worked on the paper, then today I would be glad I did it. Whereas, if I went out to the movie, today I would regret it. This enabled me to see that I should work on the paper rather than going out to (...) a movie. This looks like excellent reasoning: Paper argument: 1. If I work on my paper, I’ll be glad I did it. 2. Therefore, I should work on my paper. When we’re having trouble making a big life decision, we often try to picture what will happen each way we might choose, and imagine how we’ll feel in that outcome. When choosing between two jobs, we might use this reasoning. Suppose you are choosing between two jobs and you know quite a lot about what the two jobs will be like. In one, you will make a lot of money but have to work eighty-hour weeks and see little of your family. In the other, you will make considerably less money—though enough to support yourself and your family. You’ll have much more time for your family. The money is attractive. But overall, you realize you’ll be glad to have the time with your family if you take the second job—you’ll be glad you made that choice. It seems this is a good way of realizing that you should take the second job. (shrink)