More than twenty years after its original publication, The Case for Animal Rights is an acknowledged classic of moral philosophy, and its author is recognized as the intellectual leader of the animal rights movement. In a new and fully considered preface, Regan responds to his critics and defends the book's revolutionary position.

This book is a defense of modal realism; the thesis that our world is but one of a plurality of worlds, and that the individuals that inhabit our world are only a few out of all the inhabitants of all the worlds. Lewis argues that the philosophical utility of modal realism is a good reason for believing that it is true.

What happens when machines become more intelligent than humans? One view is that this event will be followed by an explosion to ever-greater levels of intelligence, as each generation of machines creates more intelligent machines in turn. This intelligence explosion is now often known as the “singularity”. The basic argument here was set out by the statistician I.J. Good in his 1965 article “Speculations Concerning the First Ultraintelligent Machine”: Let an ultraintelligent machine be defined as a machine that can far (...) surpass all the intellectual activities of any man however clever. Since the design of machines is one of these intellectual activities, an ultraintelligent machine could design even better machines; there would then unquestionably be an “intelligence explosion”, and the intelligence of man would be left far behind. Thus the first ultraintelligent machine is the last invention that man need ever make. The key idea is that a machine that is more intelligent than humans will be better than humans at designing machines. So it will be capable of designing a machine more intelligent than the most intelligent machine that humans can design. So if it is itself designed by humans, it will be capable of designing a machine more intelligent than itself. By similar reasoning, this next machine will also be capable of designing a machine more intelligent than itself. If every machine in turn does what it is capable of, we should expect a sequence of ever more intelligent machines. This intelligence explosion is sometimes combined with another idea, which we might call the “speed explosion”. The argument for a speed explosion starts from the familiar observation that computer processing speed doubles at regular intervals. Suppose that speed doubles every two years and will do so indefinitely. Now suppose that we have human-level artificial intelligence 1 designing new processors. Then faster processing will lead to faster designers and an ever-faster design cycle, leading to a limit point soon afterwards. The argument for a speed explosion was set out by the artificial intelligence researcher Ray Solomonoff in his 1985 article “The Time Scale of Artificial Intelligence”.1 Eliezer Yudkowsky gives a succinct version of the argument in his 1996 article “Staring at the Singularity”: “Computing speed doubles every two subjective years of work.. (shrink)

Jeff McMahan urges us to reject the view, dominant throughout history, that mere participation in an unjust war is not wrong.

More than twenty years after its original publication, _The Case for Animal Rights _is an acknowledged classic of moral philosophy, and its author is recognized as the intellectual leader of the animal rights movement. In a new and fully considered preface, Regan responds to his critics and defends the book's revolutionary position.

: Experiments involving the transplantation of human stem cells and their derivatives into early fetal or embryonic nonhuman animals raise novel ethical issues due to their possible implications for enhancing the moral status of the chimeric individual. Although status-enhancing research is not necessarily objectionable from the perspective of the chimeric individual, there are grounds for objecting to it in the conditions in which it is likely to occur. Translating this ethical conclusion into a policy recommendation, however, is complicated by the (...) fact that substantial empirical and ethical uncertainties remain about which transplants, if any, would significantly enhance the chimeric individual's moral status. Considerations of moral status justify either an early-termination policy on chimeric embryos, or, in the absence of such a policy, restrictions on the introduction of pluripotent human stem cells into early-stage developing animals, pending the resolution of those uncertainties. (shrink)

Since its original publication in 1975, this groundbreaking work has awakened millions of concerned men and women to the shocking abuse of animals everywhere--inspiring a worldwide movement to eliminate much of the cruel and unnecessary laboratory animal experimentation of years past. In this newly revised and expanded edition, author Peter Singer exposes the chilling realities of today's "factory farms" and product-testing procedures--offering sound, humane solutions to what has become a profound environmental and social as well as moral issue. An important (...) and persuasive appeal to conscience, fairness, decency and justice, Animal Liberation is essential reading for the supporter and the skeptic alike.--From publisher description. (shrink)

This paper investigates whether moral status talk gets us anywhere in our search for answers to questions in the ethics of marginal cases. I consider the usefulness of moral status talk first on the assumption that an individual's possession of moral status is not a further fact about that individual, and then on the assumption that it is. Finally, I offer an expressivistic interpretation of moral status talk. In each case, I argue that such talk conveys nothing that cannot be (...) conveyed more clearly in other words. My conclusion is that we should stop using moral status and its cognates. (shrink)

To hold an environmental ethic is to hold that non-human beings and states of affairs in the natural world have intrinsic value. This seemingly straightforward claim has been the focus of much recent philosophical discussion of environmental issues. Its clarity is, however, illusory. The term ‘intrinsic value’ has a variety of senses and many arguments on environmental ethics suffer from a conflation of these different senses: specimen hunters for the fallacy of equivocation will find rich pickings in the area. This (...) paper is largely the work of the underlabourer. I distinguish different senses of the concept of intrinsic value, and, relatedly, of the claim that non-human beings in the natural world have intrinsic value; I exhibit the logical relations between these claims and examine the distinct motivations for holding them. The paper is not however merely an exercise in conceptual underlabouring. It also defends one substantive thesis: that while it is the case that natural entities have intrinsic value in the strongest sense of the term, i.e., in the sense of value that exists independently of human valuations, such value does not as such entail any obligations on the part of human beings. The defender of nature’s intrinsic value still needs to show that such value contributes to the well-being of human agents. (shrink)

Offers a forthright approach to the many disquieting questions surrounding the emotional debate over animal rights. This book includes a chapter on animal agriculture, and additional discussions of animal law, companion animal issues, genetic engineering, animal pain, animal research, and other topics.

In Beyond Humanity a leading philosopher offers a powerful and controversial exploration of urgent ethical issues concerning human enhancement.

Christine M. Korsgaard is Arthur Kingsley Porter Professor of Philosophy at Harvard University. She was educated at the University of Illinois and received a Ph.D. from Harvard. She has held positions at Yale, the University of California at Santa Barbara, and the University of Chicago, and visiting positions at Berkeley and UCLA. She is a member of the American Philosophical Association and a fellow of the American Academy of Arts and Sciences. She has published extensively on Kant, and about moral (...) philosophy and its history, the theory of practical reason, the philosophy of action, and personal identity. Her two published books are The Sources of Normativity (1992) and Creating the King- dom of Ends (1996). (shrink)

Environmental Ethics: An Anthology brings together seminal writings on the central questions in environmental ethics. The book comprises both classic and cutting-edge essays that have formed contemporary environmental ethics, ranging from the welfare of animals versus ecosystems to theories of the intrinsic value of nature. The volume also discusses alternatives to traditional environmental ethics, including deep ecology, ecofeminism, and environmental pragmatism; and presents important works on particular environmental issues, such as wilderness preservation and global climate change. Additional editorial material provides (...) a helpful overview of the field and points to new directions and controversies shaping the relationship between humans and nature into the future. Specifically designed for course use, Environmental Ethics: An Anthology provides an excellent introduction, at once accessible and thorough, to this increasingly important and urgent area of study. (shrink)

Are ecosystems morally considerable-that is, do we owe it to them to protect their “interests”? Many environmental ethicists, impressed by the way that individual nonsentient organisms such as plants tenaciously pursue their own biological goals, have concluded that we should extend moral considerability far enough to include such organisms. There is a pitfall in the ecosystem-to-organism analogy, however. We must distinguish a system’s genuine goals from the incidental effects, or byproducts, of the behavior of that system’s parts. Goals seem capable (...) of giving rise to interests; byproducts do not. It is hard to see how whole ecosystems can be genuinely goal-directed unless group selection occurs at the community level. Currently, mainstream ecological and evolutionary theory is individualistic. From such a theory it follows that the apparent goals of ecosystems are mere byproducts and, as such, cannot ground moral considerability. (shrink)