David Boonin presents a new account of the non-identity problem: a puzzle about our obligations to people who do not yet exist. Our actions sometimes have an effect not only on the quality of life that people will enjoy in the future, but on which particular people will exist in the future to enjoy it. In cases where this is so, the combination of certain assumptions that most people seem to accept can yield conclusions that most people seem to reject. The non-identity problem has important implications both for ethical theory and for a number of topics in applied ethics, including controversial issues in bioethics, environmental ethics and disability ethics. It has been the subject of a great deal of discussion for nearly four decades, but this is the first book-length study devoted exclusively to its examination. Boonin begins by explaining what the problem is, why the problem matters, and what criteria a solution to the problem must satisfy in order to count as a successful one. He then provides a critical survey of the solutions to the problem that have thus far been proposed in the sizeable literature that the problem has generated and concludes by developing and defending an unorthodox alternative solution, one that differs fundamentally from virtually every other available approach.

Melinda A. Roberts and David T. Wasserman 1 Purpose of this Collection What are our obligations with respect to persons who have not yet, and may not ever, come into existence? Few of us believe that we can wrong those whom we leave out of existence altogether—that is, merely possible persons. We may think as well that the directive to be “fruitful, and multiply, and replenish the earth” 1 does not hold up to close scrutiny. How can it be wrong to decline to bring ever more people into existence? At the same time, we think we are clearly ob- gated to treat future persons—persons who don’t yet but will exist—in accordance with certain stringent standards. Bringing a person into an existence that is truly awful—not worth having—can be wrong, and so can bringing a person into an existence that is worth having when we had the alternative of bringing that same person into an existence that is substantially better. We may think as well that our obligations with respect to future persons are triggered well before the point at which those persons commence their existence. We think it would be wrong, for example, to choose today to turn the Earth of the future into a miserable place even if the victims of that choice do not yet exist.

This book challenges, with several powerful arguments, some of our deepest beliefs about rationality, morality, and personal identity. The author claims that we have a false view of our own nature; that it is often rational to act against our own best interests; that most of us have moral views that are directly self-defeating; and that, when we consider future generations the conclusions will often be disturbing. He concludes that moral non-religious moral philosophy is a young subject, with a promising but unpredictable future.

What do we owe to our descendants? How do we balance their needs against our own? Tim Mulgan develops a new theory of our obligations to future generations, based on a new rule-consequentialist account of the morality of individual reproduction. He argues that the resulting theory accounts for a wide range of independently plausible intuitions - covering individual morality, intergenerational justice, and international justice. In particular, the moderate consequentialist approach is superior to its two main rivals in this area - person-affecting theories and traditional consequentialism. The former fall foul of Parfit's Non-Identity Problem, while the latter are invariably implausibly demanding. Mulgan also claims that most puzzles in contemporary value theory (such as Parfit's Repugnant Conclusion) are actually puzzles in the theory of right action, and can only be solved if we abandon strict consequentialism for a more moderate alternative. The heart of the book is the first systematic exploration of the rule-consequentialist account of the morality of individual reproduction. Mulgan demostrates that this account is superior to all available alternatives, both consequentialist and non-consequentialist. Once we recognise the intergenerational dimension, moral and political philosophy cannot be considered in isolation. The latter must be founded on the former. Rule consequentialism provides the best foundation for a theory of intergenerational justice. Future People brings together several different contemporary philosophical discussions: obligations to future generations, the morality of individual reproduction, the demands of morality, and international justice. While the focus is on developing a new account, there are also substantial discussions of alternative views, especially contract-based accounts of intergenerational justice and competing forms of consequentialism.

This original, comprehensive theory of procreative ethics explains what kind of act procreation is and when we may permissibly engage in it. In order to ascertain when the procreative risk is permissible to impose, Weinberg proposes contractualist principles to fairly attend to the interests prospective parents have in procreating and the interests future people have in a life of human flourishing. The book presents a solution to the non-identity problem as well as dilemmas regarding our liberal principles of autonomy, consent, and equality, which may seem to be in tension with our procreative practices.

A vital new moral perspective on the climate change debate. Esteemed philosopher John Broome avoids the familiar ideological stances on climate change policy and examines the issue through an invigorating new lens. As he considers the moral dimensions of climate change, he reasons clearly through what universal standards of goodness and justice require of us, both as citizens and as governments. His conclusions—some as demanding as they are logical—will challenge and enlighten. Eco-conscious readers may be surprised to hear they have a duty to offset all their carbon emissions, while policy makers will grapple with Broome’s analysis of what if anything is owed to future generations. From the science of greenhouse gases to the intricate logic of cap and trade, Broome reveals how the principles that underlie everyday decision making also provide simple and effective ideas for confronting climate change. Climate Matters is an essential contribution to one of the paramount issues of our time.

Derek Parfit, who died in 2017, is widely believed to have been the best moral philosopher in well over a century. The twenty new essays in this book were written in his honour and have all been inspired by his work--in particular, his work in an area of moral philosophy known as 'population ethics', which is concerned with moral issues raised by causing people to exist. Until Parfit began writing about these issues in the 1970s, there was almost no discussion of them in the entire history of philosophy. But his monumental book Reasons and Persons (OUP, 1984) revealed that population ethics abounds in deep and intractable problems and paradoxes that not only challenge all the major moral theories but also threaten to undermine many important common-sense moral beliefs. It is no exaggeration to say that there is a broad range of practical moral issues that cannot be adequately understood until fundamental problems in population ethics are resolved. These issues include abortion, prenatal injury, preconception and prenatal screening for disability, genetic enhancement and eugenics generally, meat eating, climate change, reparations for historical injustice, the threat of human extinction, and even proportionality in war. Although the essays in this book address foundational problems in population ethics that were discovered and first discussed by Parfit, they are not, for the most part, commentaries on his work but instead build on that work in advancing our understanding of the problems themselves. The contributors include many of the most important and influential writers in this burgeoning area of philosophy.