In this paper we make a simple theoretical point using a practical issue as an example. The simple theoretical point is that robustness is not 'all or nothing': in asking whether a system is robust one has to ask 'robust with respect to what property?' and 'robust over what set of changes in the system?' The practical issue used to illustrate the point is an examination of degrees of linkage between sub-networks and a pointed contrast in robustness and fragility between (...) the dynamics of (1) contact infection and (2) information transfer or belief change. Time to infection across linked sub-networks, it turns out, is fairly robust with regard to the degree of linkage between them. Time to infection is fragile and sensitive, however, with regard to the type of sub-network involved: total, ring, small world, random, or scale-free. Aspects of robustness and fragility are reversed where it is belief updating with reinforcement rather than infection that is at issue. In information dynamics, the pattern of time to consensus is robust across changes in network type but remarkably fragile with respect to degree of linkage between sub-networks. These results have important implications for public health interventions in realistic social networks, particularly with an eye to ethnic and socio-economic sub-communities, and in social networks with sub-communities changing in structure or linkage. (shrink)

In order to understand the transmission of a disease across a population we will have to understand not only the dynamics of contact infection but the transfer of health-care beliefs and resulting health-care behaviors across that population. This paper is a first step in that direction, focusing on the contrasting role of linkage or isolation between sub-networks in (a) contact infection and (b) belief transfer. Using both analytical tools and agent-based simulations we show that it is the structure of a (...) network that is primary for predicting contact infection—whether the networks or sub-networks at issue are distributed ring networks or total networks (hubs, wheels, small world, random, or scale-free for example). Measured in terms of time to total infection, degree of linkage between sub-networks plays a minor role. The case of belief is importantly different. Using a simplified model of belief reinforcement, and measuring belief transfer in terms of time to community consensus, we show that degree of linkage between sub-networks plays a major role in social communication of beliefs. Here, in contrast to the case of contract infection, network type turns out to be of relatively minor importance. What you believe travels differently. In a final section we show that the pattern of belief transfer exhibits a classic power law regardless of the type of network involved. (shrink)

Studies investigating the specific methods for committing nonhuman animal cruelty have only begun to expose the complexities of this particular form of violence. This study used a sample of 261 male inmates surveyed at both medium- and maximum-security prisons. The study examined the influence of demographic attributes. It also examined situational factors and specific methods of animal cruelty. Regression analyses revealed that white inmates tended to shoot animals more frequently than did non-whites and were less likely to be upset or (...) cover up their actions. Respondents who had sex with animals were more likely to have acted alone and to conceal their cruelty toward animals. However, we failed to find support for a potential link between childhood and adolescent animal cruelty methods and later violence against humans. (shrink)

Public health care interventions—regarding vaccination, obesity, and HIV, for example—standardly take the form of information dissemination across a community. But information networks can vary importantly between different ethnic communities, as can levels of trust in information from different sources. We use data from the Greater Pittsburgh Random Household Health Survey to construct models of information networks for White and Black communities--models which reflect the degree of information contact between individuals, with degrees of trust in information from various sources correlated with (...) positions in that social network. With simple assumptions regarding belief change and social reinforcement, we use those modeled networks to build dynamic agent-based models of how information can be expected to flow and how beliefs can be expected to change across each community. With contrasting information from governmental and religious sources, the results show importantly different dynamic patterns of belief polarization within the two communities. (shrink)

In Sebastian Thrun, Lawrence K. Saul, and Bernhard Schölkopf (eds), Advances in Neural Information Processing Systems 16 (NIPS 2003). Cambridge, MA: MIT Press, pp. 497-504.

A scientific community can be modeled as a collection of epistemic agents attempting to answer questions, in part by communicating about their hypotheses and results. We can treat the pathways of scientific communication as a network. When we do, it becomes clear that the interaction between the structure of the network and the nature of the question under investigation affects epistemic desiderata, including accuracy and speed to community consensus. Here we build on previous work, both our own and others’, in (...) order to get a firmer grasp on precisely which features of scientific communities interact with which features of scientific questions in order to influence epistemic outcomes. (shrink)

Beyond belief change and meme adoption, both genetics and infection have been spoken of in terms of information transfer. What we examine here, concentrating on the specific case of transfer between sub-networks, are the differences in network dynamics in these cases: the different network dynamics of germs, genes, and memes. Germs and memes, it turns out, exhibit a very different dynamics across networks. For infection, measured in terms of time to total infection, it is network type rather than degree of (...) linkage between sub-networks that is of primary importance. For belief transfer, measured in terms of time to consensus, it is degree of linkage rather than network type that is crucial. Genes model each of these other dynamics in part, but match neither in full. For genetics, like belief transfer and unlike infection, network type makes little difference. Like infection and unlike belief, on the other hand, the dynamics of genetic information transfer within single and between linked networks are much the same. In ways both surprising and intriguing, transfer of genetic information seems to be robust across network differences crucial for the other two. (shrink)

It is widely accepted that the way information transfers across networks depends importantly on the structure of the network. Here, we show that the mechanism of information transfer is crucial: in many respects the effect of the specific transfer mechanism swamps network effects. Results are demonstrated in terms of three different types of transfer mechanism: germs, genes, and memes. With an emphasis on the specific case of transfer between sub-networks, we explore both the dynamics of each of these across networks (...) and a measure of their comparative fitness. Germ and meme transfer exhibit very different dynamics across linked networks. For germs, measured in terms of time to total infection, network type rather than degree of linkage between sub-networks is the primary factor. For memes or belief transfer, measured in terms of time to consensus, it is the opposite: degree of linkage trumps network type in importance. The dynamics of genetic information transfer is unlike either germs or memes. Transfer of genetic information is robust across network differences to which both germs and memes prove sensitive. We also consider function: how well germ, gene, and meme transfer mechanisms can meet their respective objectives of infecting the population, mixing and transferring genetic information, and spreading a message. A shared formal measure of fitness is introduced for purposes of comparison, again with an emphasis on linked sub-networks. Meme transfer proves superior to transfer by genetic reproduction on that measure, with both memes and genes superior to infection dynamics across all networks types. What kinds of network structure optimize fitness also differ among the three. Both germs and genes show fairly stable fitness with added links between sub-networks, but genes show greater sensitivity to the structure of sub-networks at issue. Belief transfer, in contrast to the other two, shows a clear decline in fitness with increasingly connected networks. When it comes to understanding how information moves on networks, our results indicate that questions of information dynamics on networks cannot be answered in terms of networks alone. A primary role is played by the specific mechanism of information transfer at issue. We must first ask about how a particular type of information moves. (shrink)

Understanding the dynamics of information is crucial to many areas of research, both inside and outside of philosophy. Using computer simulations of three kinds of information, germs, genes, and memes, we show that the mechanism of information transfer often swamps network structure in terms of its effects on both the dynamics and the fitness of the information. This insight has both obvious and subtle implications for a number of questions in philosophy, including questions about the nature of information, whether there (...) is genetic information, and how to arrange scientific communities. (shrink)

Liver transplantation is the treatment of choice for many forms of liver disease. Unfortunately, the scarcity of cadaveric donor livers limits the availability of this technique. To improve the availability of liver transplantation, surgeons have developed the capability of removing a portion of liver from a live donor and transplanting it into a recipient. A few liver transplants using living donors have been performed worldwide.Our purpose was to analyze the ethics of liver transplants using living donors and to propose guidelines (...) for the procedure before it was introduced in the United States. We used a process of research ethics consultation that involves a collaboration between clinical investigators and clinical ethicists. We concluded that it was ethically appropriate to perform liver transplantation using living donors in a small series of patients on a trial basis, and we published our ethical guidelines in a medical journal before the procedure was introduced. We recommend this prospective, public approach for the introduction of other innovative therapies in medicine and surgery. (shrink)

Waiting belongs to the greatly overlooked practices of everyday life, and among the many fields enforcing waiting times, transportation certainly accounts for a most prominent generator.

German Philosophers contains studies of four of the most important German theorists: Kant, arguably the most influential modern philosopher; Hegel, whose philosophy inspired an enduring vision of a communist society; Schopenhauer, renowned for his pessimistic preference for non-existence; and Nietzsche, who has been appropriated as an icon by an astonishingly diverse spectrum of people.

The journey towards morality in nature can be seen through the million-year-old relationship of the flowering plant and honeybee social group. _Flowers and Honeybees_ brings what science has learned into a dialog with the philosophy of morality.

The article gives an account of the prelude to an extensive ethical debate in Germany which was sparked off by an invitation to the Australian philosopher Peter Singer to speak at the University of Dortmund. He was to lecture about the right to life of severely handicapped new-born babies. But among special educators this theme provoked violent protests throughout the country; organisations of the disabled and various other groups forced the cancellation of the lecture and discussion with Peter (...) class='Hi'>Singer. The kind of dispute which follows in special education is not to be judged without consideration of the methodological background of this young discipline. The events around the ‘Singer affair’ have shown severe methodological deficits, which may or rather must be cured in future. (shrink)

Debate concerning the social impact of obesity has been ongoing since at least the 1980s. Bioethicists, however, have been relatively silent. If obesity is addressed it tends to be in the context of resource allocation or clinical procedures such as bariatric surgery. However, prominent bioethicists Peter Singer and Dan Callahan have recently entered the obesity debate to argue that obesity is not simply a clinical or personal issue but an ethical issue with social and political consequences. This article critically (...) examines two problematic aspects of Singer and Callahan's respective approaches. First, there is an uncritical assumption that individuals are autonomous agents responsible for health-related effects associated with food choices. In their view, individuals are obese because they choose certain foods or refrain from physical activity. However, this view alone does not justify intervention. Both Singer and Callahan recognize that individuals are free to make foolish choices so long as they do not harm others. It is at this point that the second problematic aspect arises. To interfere legitimately in the liberty of individuals, they invoke the harm principle. I contend, however, that in making this move both Singer and Callahan rely on superficial readings of public health research to amplify the harm caused by obese individuals and ignore pertinent epidemiological research on the social determinants of obesity. I argue that the mobilization of the harm principle and corresponding focus on individual behaviours without careful consideration of the empirical research is itself a form of harm that needs to be taken seriously. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 40.2 (2002) 274-275 [Access article in PDF] Book Review Perspectives on Habermas Lewis Edwin Hahn, editor. Perspectives on Habermas. New York: Open Court, 2000. Pp. xiv + 586. Paper, $29.95. This collection of essays on the wide-ranging body of thought produced by Jürgen Habermas over the course of close to fifty years represents a significant lost opportunity. Although originally planned as a volume (...) in the Library of Living Philosophers series, in 1999 Habermas pulled out of the project because, as Hahn tells us, "of other events in his life" (ix). Volumes in this series have typically provided unique and valuable resources: not only quality secondary essays by leading contemporary philosophers, but essay-by-essay responses by the featured philosopher, as well as an intellectual autobiography, and a useful bibliography. Unfortunately, the present volume not only lacks Habermas's responses to the contributors, an intellectual autobiography, and a bibliography of his works, but is also comprised of essays whose collective quality can only be considered notably erose, containing essays of both significant and questionable value.First the bad news. Of the twenty-nine essays just over half are not worth reading for those either new to, or long familiar with, Habermas. The great majority of these present significantly distorted or confused accounts of different aspects of his work, often apparently based on little or no familiarity with the primary source material, and close to none with the significant body of secondary literature. Some authors seem not to have read anything published in English translation by Habermas past 1973 or so, even though his two most significant works--The Theory of Communicative Action (1984 and 1987) and Between Facts and Norms: Contributions to a Discourse Theory of Law and Democracy (1996)--appeared later. Ignorance of the second of these is especially pronounced throughout and regrettable since many patently false claims about Habermas's positions on issues in political philosophy, legal theory, and social theory could have been avoided by consulting Between Facts and Norms, rather than deriving "Habermas's position" aprioristically from what one thinks he might say. Other essays present particularly nasty and personalized invective in the place of argument: one author for example, calls Habermas's political opinions "pathological," "inhumane," "exhibiting a seriously flawed sensitivity," and so "beastly" as to raise "profound questions about the writer's claims to superior rationality."The good news is that close to half of the volume contains important and stimulating work. Some of the best of this performs the crucial tasks of sensitively explicating Habermas's ideas, carefully critiquing them where needed, and finally extending the reformed ideas to new domains, new problems, and new issues. Exemplary in this way is James Bohman's [End Page 274] piece on reviving the project of ideology critique by using Robert Brandom's pragmatic inferentialism to cash out Habermas's notion of systematically distorted communication. Other useful articles on broadly epistemic themes include those by David Detmer, Richard Palmer, Carlos Pereda, and Beth Singer.Two essays--by Enrique Dussel and James Marsh--represent broad and incisive, yet sympathetic, critiques of Habermas for not sufficiently carrying through on the emancipatory promise of critical theory. Both point to a certain preoccupation in Habermas's work in moral and political theory with issues of rationality, proceduralism, and ideal justification that seems to have crowded out a practical focus on issues of poverty, inequality, and exploitation, especially as these are articulated through the emerging structures of global capitalism and along the fault lines separating West and East, North and South. Concurring in political upshot, but drawing on Habermas's new form of social contractarian argument, David Ingram argues provocatively that Habermas's ideals of social equality require much more radical forms of "market socialism" and direct democratic self-organization than Habermas himself is willing to endorse. Douglas Kellner's outstanding article gives a clear overview of Habermas's changing conception of the public sphere and its role in democracy, presents various criticisms of that, and argues for an account conceptually and evaluatively adequate to the emergence... (shrink)

In his essay “The Human Prejudice” Bernard Williams presented a sophisticated defense of the moral relevance of the concept “human being”. Here I offer both an analysis of his essay and a defense of his conclusions against criticisms made by Julian Savulescu and Peter Singer. After a discussion of the structure of Williams’s argument, I focus on several complaints from Savulescu: that Williams underestimates the similarities between speciesism and racism or sexism, that Williams relies on a disputable internalism about (...) reasons to make his case, that Williams ignores the arbitrariness of species membership, and (a complaint also made by Singer) that Williams attacks a straw man in considering only negative utilitarianism when criticizing the idea of an Impartial Observer. I defend Williams against these charges and end with a brief discussion of how his alien invasion example illustrates the fundamentally different philosophical sensibility of Bernard Williams in comparison to critics like Savulescu and Singer. (shrink)

The essay combines a specific and a more general theme. In attacking ‘the doctrine of the sanctity of human life’ Singer takes himself thereby to be opposing the conviction that human life has special value. I argue that this conviction goes deep in our lives in many ways that do not depend on what Singer identifies as central to that ‘doctrine’, and that his attack therefore misses its main target. I argue more generally that Singer’s own moral (...) philosophy affords only an impoverished and distorted sense of the value of human life and human beings. In purporting to dig below the supposedly illusion–ridden surface of our thinking about value, Singer in fact often leads us away from the robust terrain of our lived experience into rhetorical, and sometimes brutal, fantasy. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:TragedyA Lesson in SurvivalChristopher Perricone (bio)Tragedy and Its Historical Context"Tragedy" in the strict sense of the word refers to an ancient Greek literary genre, a form of drama for the most part performed publicly in the theater. As is well known, the word "tragedy" literally means "goat song." The belief among scholars is that early singers of tragedy wore goatskin costumes in imitation of satyrs. Also, as is well (...) known, Aristotle defines "tragedy" in the strict sense of the word as "the imitation of an action that is serious and also having magnitude, complete in itself; in language with pleasurable accessories, each kind brought in separately in the parts of the work; in a dramatic, not in a narrative form; with incidents arousing pity and fear, wherewith to accomplish its catharsis of such emotions."1 Of course, when one thinks of tragedy in the strict sense the names that come to mind are Aeschylus, Sophocles, and Euripides. It is arguable that these men not only set the stage for and developed the idea of tragedy in the strict sense, but they also laid the foundations of tragedy for centuries to come.After the Greeks, not surprisingly, tragedy evolves. The strict sense of the term as a point of reference, origin, or nucleus, remains—that is, after the Greeks, tragedy still retains that sense of "an imitation of an action that is serious." However, when one considers what later goes by the name of tragedy, one is hard-pressed, without resorting to Procrustean measures, to fit with any precision those later works of tragedy into the original Greek mold. After the Greeks, Seneca composes tragedies, as do Marlowe, Shakespeare, Corneille, Racine, Goethe, Schiller, Ibsen, Chekov, Lorca, Anouilh, Miller, et al. Even the sense of "serious" is not exactly the same: is the seriousness of Hedda Gabler's or Willie Loman's fate at all comparable to the fates of [End Page 70] Medea or Oedipus? The former cases surely seem serious in some domestic sense, whereas the latter clearly are intended to imply seriousness on a much grander and perhaps cosmic scale.The reason I mention all this is that "tragedy," both in what I call the strict and nuclear ancient Greek sense of the term (which does not imply that tragedy is clearly and distinctly defined, even in ancient Greece) and in the looser, derived sense of the word, has a long and compelling history. Tragedy is a form of drama to which we continually return. It is a genre that seems intrinsic not only to our very idea of theater but also to the very nature of art itself. Although one may debate the plausibility of writing tragedies in a disillusioned and nonheroic age, nevertheless one can hardly imagine the theater existing without tragedy. One way or another, it seems tragedies, whether in the strict or loose sense, will always be performed, and not merely out of nostalgia. Indeed, given the compelling nature of tragedy, it seems no accident that among the giants of literature, the tragedians are significantly represented. The compelling nature of tragedy is nicely expressed by the literary critic F. L. Lucas, and his statements should be considered a complement to Aristotle:Tragedy, then, is a representation of human unhappiness, which pleases us notwithstanding, by the truth with which it is seen and the fineness with which it is communicated—"l'amertume poignante et fortifiante de tout ce qui est vrai." ["The invigorating and poignant bitterness of whatever is true"; my translation.] The world of everyday seems often a purposeless chaos, a mangy tiger without even the fearful symmetry of Blake's vision; but the world of tragedy we can face, for we feel mind behind it and the symmetry is there. Tragedy, in fine, is man's answer to this universe that crushes him so pitilessly. Destiny scowls upon him; his answer is to sit down and paint her where she stands.2It is not only true that tragedy as practice and performance has a long and rich history; the study of tragedy has an equally long and rich history. The idea of tragedy has attracted, tantalized, frustrated, and exercised... (shrink)

Contemporary moral philosophy assumes an account of what it means to legitimately change one’s mind in ethics, and I wish to challenge this account by enlarging the category of the legitimate. I am just as eager to avoid illegitimate mind-changing brought on by deceit or brainwashing, but I claim that legitimacy should be defined in terms of transparency of method. A social reformer should not be embarrassed to admit that he acquired many beliefs about justice while reading Dickens. As such, (...) appeals to the heart and the imagination are just as legitimate, within limits, as appeals to the mind; and showing can be as legitimate as telling. To demonstrate this, I consider the example of a vegetarian trying to ‘convert’ a carnivore. I then ask what it means when the carnivore claims to have been previously mistaken. (shrink)

This paper begins with Peter Singer’s argument from utilitarianism that we should sacrifice anything we don’t need to relatively cheaply save lives in the Third World. It responds by arguing that utilitarianism is an incomplete moral system, for it requires us to view the world impartially and see each being as equally important, when we are necessarily partial to certain others (family, for example) because, among other things, we learn how to care for a starving boy thousands of miles (...) away by first learning what caring means from those closer to us. It then concludes that a more complete way to describe our morality is to see it as a balance between our separate senses of partiality and impartiality, with Aristotle’s concept of moral judgment governing between the two. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:The Last Puritan: A Memoir in the Form of a NovelChristopher PerriconeThe Last Puritan: A Memoir in the Form of a Novel, by George Santayana; edited by H. J. Saatkamp and W. G. Holzberger; xli & 744 pp. Cambridge: MIT Press, 1994, $50.00.In 1936, Irwin Edman reviewed The Last Puritan for the New York Times. It was a sympathetic review. However, Edman was not blind to the novel’s (...) fundamental weakness: it is driven by ideas, “essences,” rather than characters, ones you might hate or love: “... this is a poet’s novel and philosopher’s tale.... If the characters do not come to life, they live as themes dramatized and as ‘human persuasions.’”This year Harold Bloom wrote in The Western Canon that canonical works are those works which deserve re-reading. As a novel, The Last Puritan does not deserve re-reading, as Tom Jones, The Trial, or Huckleberry Finn, do. But as a philosophy “not argued but presented as a picture” (Edman), The Last Puritan may be among Santayana’s best works. Yes, one reads and re-reads The Last Puritan because one wants to know the ideas of America’s great philosophical poet. Without the philosophy to support the novel, I am not sure it would have a reason for being. One is not interested per se in Santayana’s plot or characters, their friendships and failures, Oliver and Jim, their deaths, or Mario, his paganism and love of life. Rather one wants to be enchanted by [End Page 186] Santayana’s poetic voice; one wants to know what Santayana thinks about the play of spirit and matter and how “the genteel tradition” had so much promise and yet had gone bad. And these are, indeed, in principle, the very same reasons why one reads and rereads Plato, Lucretius, or Dante.The critical edition, put together by Saatkamp and Holzberger, with an introduction by Irving Singer, is a first-class piece of work. It is everything a Santayana scholar would want or need. Singer’s introduction provides the reader with a sound and well-researched background on Santayana and Oliver’s story, and anticipates some problems of aesthetics the reader will face, e.g., the problem of character development. Unlike me, Singer thinks Santayana’s “idealizations” bring vitality to character: “Far from being desiccated types, the great characters in fiction give one a sense of individuality that often seems more natural to us than what is found in nature itself” (p. xix). Notwithstanding my disagreement with Singer, his presentation is well thought-out and plausible.The “Editorial Appendix,” written by Saatkamp and Holzberger, is impeccable. In the “Notes to the Text” they provide the scholar or the curious reader with a marvelous wealth of information. They run down and support with convincing evidence every allusion in the novel. In the “Textual Commentary,” they provide a statement of textual principles and procedures, a description and development of the text, and an explanation of how the critical text was established; in effect, after one has read the product, one can then read about the process by which the product was brought about. Naturally, there are also lists of emendations and variants.As a philosophical novel, I recommend The Last Puritan to anyone who believes that “... what the realm of essence, in its mute eternity, chiefly adds to our notion of nature is the proof that nature is contingent. An infinite canvas is spread before us on which any world might have been painted. The actuality of things is sharpened and the possibilities of things are enlarged. We cease to be surprised or distressed at finding existence unstable and transitory. Why should it have been otherwise? Not only must our own lives be insecure, as earthly seasons change, but perhaps all existence is in flux, even down to its first principles. Dum vivimus, vivamus. Everything, so long as it recognizably endures, is free to deploy its accidental nature, and we may lead the life of reason with a good grace, harmonizing as well as possible our various impulses and opportunities, and exploring the realm of essence as our genius may prompt” (Santayana, “A General Confession... (shrink)

In 1972, the young philosopher Peter Singer published "Famine, Affluence and Morality," which rapidly became one of the most widely discussed essays in applied ethics. Through this article, Singer presents his view that we have the same moral obligations to those far away as we do to those close to us. He argued that choosing not to send life-saving money to starving people on the other side of the earth is the moral equivalent of neglecting to save drowning (...) children because we prefer not to muddy our shoes. If we can help, we must--and any excuse is hypocrisy. Singer's extreme stand on our moral obligations to others became a powerful call to arms and continues to challenge people's attitudes towards extreme poverty. Today, it remains a central touchstone for those who argue we should all help others more than we do. As Bill and Melinda Gates observe in their foreword, in the age of today's global philanthropy, Singer's essay is as relevant now as it ever was. This attractively packaged, concise edition collects the original article, two of Singer's more recent popular writings on our obligations to others around the world, and a new introduction by Singer that discusses his current thinking. (shrink)

Le propos de cet ouvrage, paru dans la collection _Repères _aux éditions La Découverte_ _est d’offrir une introduction précise et nuancée à l’utilitarisme comme courant philosophique depuis Bentham jusqu’aux utilitaristes contemporains (Peter Singer, Derek Parfit notamment). Dans un petit format (128 pages dont 108 de texte et 13 de bibliographie), Christophe Salvat donne une synthèse problématisée et efficace des avancées récentes de la recherche et met en valeur leur contribution aux questions éthiques contemporaines. Dans le paysage intellectuel anglophone, l’utilitarisme (...) occupe une place spécifique depuis le début du XIX e siècle. Les idées de Jeremy Bentham, de John Stuart Mill puis de Henry Sidgwick ont été diffusées, commentées et attaquées, elles ont joué un rôle structurant dans les controverses de l’époque victorienne. Au XX e siècle, une riche tradition universitaire – notamment dans les départements de droit, de politique et de philosophie – a contribué à considérablement élarg... (shrink)

For thirty years, Peter Singer's Practical Ethics has been the classic introduction to applied ethics. For this third edition, the author has revised and updated all the chapters and added a new chapter addressing climate change, one of the most important ethical challenges of our generation. Some of the questions discussed in this book concern our daily lives. Is it ethical to buy luxuries when others do not have enough to eat? Should we buy meat from intensively reared animals? (...) Am I doing something wrong if my carbon footprint is above the global average? Other questions confront us as concerned citizens: equality and discrimination on the grounds of race or sex; abortion, the use of embryos for research and euthanasia; political violence and terrorism; and the preservation of our planet's environment. This book's lucid style and provocative arguments make it an ideal text for university courses and for anyone willing to think about how she or he ought to live. (shrink)

Peter Singer's remarkably clear and comprehensive Practical Ethics has become a classic introduction to applied ethics since its publication in 1979 and has been translated into many languages. For this second edition the author has revised all the existing chapters, added two new ones, and updated the bibliography. He has also added an appendix describing some of the deep misunderstanding of and consequent violent reaction to the book in Germany, Austria, and Switzerland where the book has tested the limits (...) of freedom of speech. The focus of the book is the application of ethics to difficult and controversial social questions. (shrink)

In a thoughtful reassessment of the meaning of life and death, a noted philosopher offers a new definition for life that contrasts a world dependent on biological maintenance with one controlled by state-of-the-art medical technology. Tour.

Suppose we believe that God created the world. Then surely we want it to be the case that he intended, in some sense at least, to create THIS world. Moreover, most theists want to hold that God didn't just guess or hope that the world would take one course or another; rather, he KNEW precisely what was going to take place in the world he planned to create. In particular, of each person P, God knew that P was to exist. (...) Call this the "standard" conception. Most theists find the standard conception appealing. Unfortunately, the view seems to conflict with the equally appealing idea — call it "temporal actualism" — that there are no "future" individuals beyond those that already exist in the present moment. For, on this view, for any historical person P, prior to creation, there was no such person as P and hence nothing about P for God to know. Hence, in particular, God couldn't have known that P was to exist. This is of course not a new problem. But past solutions to it are highly problematic. In this paper, after canvassing previous approaches, I will propose a solution that seems to preserve both temporal actualism and a suitably robust form of the standard conception while avoiding the pitfalls of the past. (shrink)

In this volume, some of today's most distinguished philosophers survey the whole field of ethics, from its origins, through the great ethical traditions, to theories of how we ought to live, arguments about specific ethical issues, and the nature of ethics itself. The book can be read straight through from beginning to end; yet the inclusion of a multi-layered index, coupled with a descriptive outline of contents and bibliographies of relevant literature, means that the volume also serves as a work (...) of reference, both for those coming afresh to the study of ethics and for readers already familiar with the subject. (shrink)

What is ethics? Where do moral standards come from? Are they based on emotions, reason, or some innate sense of right and wrong? For many scientists, the key lies entirely in biology---especially in Darwinian theories of evolution and self-preservation. But if evolution is a struggle for survival, why are we still capable of altruism? In his classic study The Expanding Circle, Peter Singer argues that altruism began as a genetically based drive to protect one's kin and community members but (...) has developed into a consciously chosen ethic with an expanding circle of moral concern. Drawing on philosophy and evolutionary psychology, he demonstrates that human ethics cannot be explained by biology alone. Rather, it is our capacity for reasoning that makes moral progress possible. In a new afterword, Singer takes stock of his argument in light or recent research on the evolution of morality.--Publisher's description. (shrink)

Since its original publication in 1975, this groundbreaking work has awakened millions of people to the existence of "speciesism"—our systematic disregard of nonhuman animals—inspiring a worldwide movement to transform our attitudes to animals and eliminate the cruelty we inflict on them. In Animal Liberation, author Peter Singer exposes the chilling realities of today’s "factory farms" and product-testing procedures—destroying the spurious justifications behind them, and offering alternatives 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, it is essential reading for the supporter and the skeptic alike. (shrink)

In the Brazilian film "Central Station," Dora is a retired schoolteacher who makes ends meet by sitting at the station writing letters for illiterate people. Suddenly she has an opportunity to pocket $1,000. All she has to do is persuade a homeless 9-year-old boy to follow her to an address she has been given. (She is told he will be adopted by wealthy foreigners.) She delivers the boy, gets the money, spends some of it on a television set and settles (...) down to enjoy her new acquisition. Her neighbor spoils the fun, however, by telling her that the boy was too old to be adopted —he will be killed and his organs sold for transplantation. Perhaps Dora knew this all along, but after her neighbor's plain speaking, she spends a troubled night. In the morning Dora resolves to take the boy back. (shrink)

Public discussions of political and social issues are often characterized by deep and persistent polarization. In social psychology, it’s standard to treat belief polarization as the product of epistemic irrationality. In contrast, we argue that the persistent disagreement that grounds political and social polarization can be produced by epistemically rational agents, when those agents have limited cognitive resources. Using an agent-based model of group deliberation, we show that groups of deliberating agents using coherence-based strategies for managing their limited resources tend (...) to polarize into different subgroups. We argue that using that strategy is epistemically rational for limited agents. So even though group polarization looks like it must be the product of human irrationality, polarization can be the result of fully rational deliberation with natural human limitations. (shrink)

We motivate a picture of social epistemology that sees forgetting as subject to epistemic evaluation. Using computer simulations of a simple agent-based model, we show that how agents forget can have as large an impact on group epistemic outcomes as how they share information. But, how we forget, unlike how we form beliefs, isn’t typically taken to be the sort of thing that can be epistemically rational or justified. We consider what we take to be the most promising argument for (...) this claim and find it lacking. We conclude that understanding how agents forget should be as central to social epistemology as understanding how agents form beliefs and share information with others. (shrink)