In an earlier article I argued that individuals are obligated not to exceed their fair share of emissions entitlements, that many exceed their fair share at present and thus ought to reduce their emissions as far as can reasonably be demanded. The peer commentators raised various insightful and pressing concerns, but the following objections seem particularly important: It was argued that the fair share argument is insufficiently justified, that it is incoherent, that it would result in more far-reaching duties than (...) acknowledged by me, that it is unable to provide a clear account of individual duties, and that duties to reduce individual emissions are not Kantian imperfect duties. This reply aims at clarifying the fair share argument and at addressing the major challenges. (shrink)

Contrary to political and philosophical consensus, we argue that the threats posed by climate change justify population engineering, the intentional manipulation of the size and structure of human populations. Specifically, we defend three types of policies aimed at reducing fertility rates: choice enhancement, preference adjustment, and incentivization. While few object to the first type of policy, the latter two are generally rejected because of their potential for coercion or morally objectionable manipulation. We argue that forms of each policy type are (...) pragmatically and morally justified tools for preventing the harms of global climate change. (shrink)

John Locke's political theory has been the subject of many detailed treatments by philosophers and political scientists. But The Lockean Theory of Rights is the first systematic, full-length study of Locke's theory of rights and of its potential for making genuine contributions to contemporary debates about rights and their place in political philosophy. Given that the rights of persons are the central moral concept at work in Locke's and Lockean political philosophy, such a study is long overdue.

Although actions of individuals do contribute to climate change, the question whether or not they, too, are morally obligated to reduce the GHG emissions in their responsibility has not yet been addressed sufficiently. First, I discuss prominent objections to such a duty. I argue that whether individuals ought to reduce their emissions depends on whether or not they exceed their fair share of emission rights. In a next step I discuss several proposals for establishing fair shares and also take practical (...) considerations into account. I conclude that individuals should not always be obliged to reduce their emissions to what is their fair share for they may depend on carbon-intensive structures. Instead, they have a Kantian imperfect duty to reduce their emissions ‘as far as can reasonably be demanded of them’. In addition, they should press governments to introduce proper regulation. At the end, I further specify both duties. (shrink)

When people use a resource without a co-ordinated plan the result is often a tragedy of the commons in which the resource is depleted. Many environmental resources display the characteristics of a developing tragedy of the commons. Many believe that each person is ethically obligated to reduce use of the commons to the sustainable level. I argue that this is mistaken. In a tragedy of the commons there is no reasonable expectation that individual, voluntary action will succeed. Our obligation is (...) not fruitlessly to reduce individual use, but to support a collective agreement to reduce everyone's use to the sustainable level. (shrink)

Obligations to reduce one’s green house gas emissions appear to be difficult to justify prior to large-scale collective action because an individual’s emissions have virtually no impact on the environmental problem. However, I show that individuals’ emissions choices raise the question of whether or not they can be justified as fair use of what remains of a safe global emissions budget. This is true both before and after major mitigation efforts are in place. Nevertheless, it remains difficult to establish an (...) obligation to reduce personal emissions because it appears unlikely that governments will in fact maintain safe emissions budgets. The result, I claim, is that under current conditions we lack outcome, fairness, promotional, virtue or duty based grounds for seeing personal emissions reductions as morally obligatory. (shrink)

In this essay I will discuss the relationship between two of the most basic ideas in political and legal philosophy: the justification of the state and state legitimacy. I plainly cannot aspire here to a complete account of these matters; but I hope to be able to say enough to motivate a way of thinking about the relation between these notions that is, I believe, superior to the approach which seems to be dominant in contemporary political philosophy. Today showing that (...) a state is justified and showing that it is legitimate are typically taken to require the very same arguments. I will argue that this contemporary stance obscures the difference between two central ways in which we should morally evaluate states, and it generates confusions about other serious practical issues, such as those surrounding our moral obligations to comply with law. I begin with brief discussions of the ideas of justification and legitimacy and with an attempt to capture what ought to be most central in our concerns about these ideas. I turn then to two basic ways of thinking about the relation between justification and legitimacy that I want to distinguish: what I will call the Lockean and the Kantian approaches. Next, I argue that the minority Lockean approach to this issue captures essential features of institutional evaluation that the majority Kantian approach does not; and I add brief mention of one further complication facing any adequate account of political evaluation. (shrink)

Very few moral philosophers have written on climate change.1 This is puzzling, for several reasons. First, many politicians and policy makers claim that climate change is not only the most serious environmental problem currently facing the world, but also one of the most important international problems per se.2 Second, many of those working in other disciplines describe climate change as fundamentally an ethical issue.3.

Climate change is an ethical issue, because it involves the distribution of a scarce resource – the capacity of the atmosphere to absorb our waste gases without producing consequences that no one wants. Various principles might be used to decide what distribution is just. This commentary argues that on any plausible principle, the industrialised nations should be doing much more than they are doing now, and much more than they are required to do by the Kyoto protocol, to reduce their (...) greenhouse gas emissions. The commentary also responds specifically to some issues raised by MacCracken, Toman and Gardiner, including feasibility, the discount rate, and grounds for pessimism. (shrink)

This paper examines what would be a fair distribution of the right to emit greenhouse gases. It distinguishes between views that treat the distribution of this right on its own (Isolationist Views) and those that treat it in conjunction with the distribution of other goods (Integrationist Views). The most widely held view treats adopts an Isolationist approach and holds that emission rights should be distributed equally. This paper provides a critique of this 'equal per capita' view, and the isolationist assumptions (...) on which it depends. It examines four arguments for this view, finding each wanting. It then presents two general challenges to the 'equal per capita' view, and, indeed, any views which treat the distribution of greenhouse gas emissions in isolation from other goods. It concludes by outlining and defending an alternative (Integrationist) approach to the distribution of rights to emit greenhouse gases. (shrink)

A currently popular proposal for fairly distributing emission quotas is the equal shares view, which holds that that emission quotas should be distributed to all human beings globally on an equal per capita basis. In this paper I aim to show that a number of arguments in favour of equal shares are based on a misleading analysis of climate change as a global commons problem. I argue that a correct understanding of the way in which climate change results from the (...) overuse of a global commons shows those who defend equal shares using commons arguments to be harbouring more controversial commitments than might at first appear. I then discuss two options for equal shares theorists who wish to maintain the view in the face of my critique, and attempt to show that one approach holds more promise than the other. (shrink)

The phenomenon of anthropogenic climate change—in which weather patterns and attendant ecological disruption result from increasing concentrations of greenhouse gases released into the atmosphere through human activities—challenges several conventional assumptions regarding moral responsibility. Multifarious individual acts and choices contribute (often imperceptibly) to the causal chain that is expected to produce profound and lasting harm unless significant mitigation efforts begin soon. Attributing responsibility for such harmful consequences is complicated by what Derek Parfit terms “mistakes in moral mathematics,” or failures to correctly (...) assess the various individual contributions to collectively produced harm. Combined with the difficulties in attributingresponsibility to agents for spatially and temporally distant harmful effects and that of holding agents culpable for effects (resulting from socially-acceptable acts) about which they may be ignorant, this paper attempts to sort out several ethical problems surrounding the identification of responsible parties contributing to climate change. (shrink)