It has sometimes been claimed (usually without evidence) that the harm caused by an individual's participation in a greenhouse-gas-intensive economy is negligible. Using data from several contemporary sources, this paper attempts to estimate the harm done by an average American. This estimate is crude, and further refinements are surely needed. But the upshot is that the average American is responsible, through his/her greenhouse gas emissions, for the suffering and/or deaths of one or two future people.

Climate change will cause large numbers of casualties, perhaps extending over thousands of years. Casualties have a clear moral significance that economic and other technical measures of harm tend to mask. They are, moreover, universally understood, whereas other measures of harm are not. Therefore, the harms of climate change should regularly be expressed in terms of casualties by such agencies such as IPCC’s Working Group III, in addition to whatever other measures are used. Casualty estimates should, furthermore, be used to (...) derive estimates of casualties per emission source up to a given date. Such estimates would have wide margins of error, but they would add substantially to humanity’s grasp of the moral costs of particular greenhouse gas emissions. (shrink)

The move from good to ought, a premise form found in many justifications of environmental ethics, is itself in need of justification. Of the potential moves from good to ought surveyed, some have considerable promise and others less or none. Those without much promise include extrapolations of obligations based on human goods to nonsentient natural entities, appeals to educated judgment, precautionary arguments, humanistic consequentialist arguments, and justifications that assert that our obligations to natural entities are neither directly to those entities (...) nor derived from our obligations to humans. Some arguments that extrapolate obligations based on goods involving sentience from humans to sentient animals are promising, but whether they are sufficient is controversial. Gandhian andAristotlian arguments are also promising, provided we can justify their ought premises. (shrink)

Suppose, as biocentrists do, that even microorganisms have a good of their own - that is, some objective form of welfare. Still, human welfare is vastly greater and more valuable. If it were infinitely greater, individualistic biocentrism would be pointless. But consideration of the facts of evolutionary history and of the conceptual relations between infinity and incommensurability reveals that there are no infinite welfare differences among living things. It follows, in particular, that there is some very large number of bacteria (...) whose aggregate overall welfare is not less than the welfare of a human being. (shrink)

I am grateful to all the respondents to ‘How harmful are the average American's greenhouse gas emissions?’. Their comments were individually and collectively very rich. Since there is...

The move from good to ought, a premise form found in many justifications of environmental ethics, is itself in need of justification. Of the potential moves from good to ought surveyed, some have considerable promise and others less or none. Those without much promise include extrapolations of obligations based on human goods to nonsentient natural entities, appeals to educated judgment, precautionary arguments, humanistic consequentialist arguments, and justifications that assert that our obligations to natural entities are neither directly to those entities (...) nor derived from our obligations to humans. Some arguments that extrapolate obligations based on goods involving sentience from humans to sentient animals are promising, but whether they are sufficient is controversial. Gandhian andAristotlian arguments are also promising, provided we can justify their ought premises. (shrink)

People tend to rank values of all kinds linearly from good to bad, but there is little reason to think that this is reasonable or correct. This book argues, to the contrary, that values are often partially ordered and hence frequently incomparable. Proceeding logically from a small set of axioms, John Nolt examines the great variety of partially ordered value structures, exposing fallacies that arise from overlooking them. He reveals various ways in which incomparability is obscured: using linear indices to (...) summarize partially ordered data, relying on an inadequately defined concept of parity, or conflating incomparability with vagueness. Incomparability can enrich and clarify a range of topics including the paradoxes of Derek Parfit, rational decision theory, and the infinite values of theology. Finally, Nolt shows how to generalize many of the concepts introduced earlier, explores the intricate depths of certain noteworthy partially ordered value structures, and argues for the finitude of value. Incomparable Values will be of interest to scholars and advanced students working in ethics, value theory, rational decision theory, and logic. (shrink)

Environmental ethicists often hold that organisms, species, ecosystems, and the like have goods of their own. But, even given that such goods exist, whether we ought to value them is controversial. Hence an environmental philosophy needs, in addition to an account of what sorts of values there are, an explanation what, how and why we morally ought to value—that is, an account of moral valuing. This paper presents one such an account. Specifically, I aim to show that unless there are (...) eternal goods (and maybe even if there are), we have a duty of self-transcendence toward nature—that is, a duty to value nature's goods as ends. This duty is owed, however, not to nature, but to ourselves. It is grounded in what I call an imperative of hope. The argument, in a nutshell, is that we have a duty to ourselves to (in a certain sense) optimize hope. This optimization requires self-transcendence toward entities whose goods are more diverse and enduring than any human goods. But unless there are eternal goods, such goods occur only in nature. (shrink)

Broad in scope, this introduction to environmental ethics considers both contemporary issues and the extent of humanity’s responsibility for distant future life. John Nolt, a logician and environmental ethicist, interweaves contemporary science, logical analysis, and ethical theory into the story of the expansion of ethics beyond the human species and into the far future. Informed by contemporary environmental science, the book deduces concrete policy recommendations from carefully justified ethical principles and ends with speculations concerning the deepest problems of environmental ethics. (...) Pedagogical features include chapter outlines, annotated suggestions for further readings, the explanations of key terms when first mentioned, and an extensive glossary. (shrink)

Moves from is to good—that is, principles that link fact to value—are fundamental to environmental ethics. The upshot is fourfold: (1) for nonanthropogenic goods, only those moves from is to good are defensible which conceive goodness as goodness for biotic entities; (2) goodness for nonsentient biotic entities is contribution to their autopoietic functioning; (3) biotic entities also function “exopoietically” to benefit related entities, and these exopoietic benefits are on average greater than their own goods; and (4) the most general is-to-good (...) principles that are defensible (and hence the ones of greatest importance for environmental ethics) concern a realm of nonanthropogenic goodness that encompasses both living and nonliving nature. (shrink)

Moves from is to good—that is, principles that link fact to value—are fundamental to environmental ethics. The upshot is fourfold: (1) for nonanthropogenic goods, only those moves from is to good are defensible which conceive goodness as goodness for biotic entities; (2) goodness for nonsentient biotic entities is contribution to their autopoietic functioning; (3) biotic entities also function “exopoietically” to benefit related entities, and these exopoietic benefits are on average greater than their own goods; and (4) the most general is-to-good (...) principles that are defensible (and hence the ones of greatest importance for environmental ethics) concern a realm of nonanthropogenic goodness that encompasses both living and nonliving nature. (shrink)

Nietzsche's embrace of the idea of eternal recurrence has long puzzled readers, both because the idea is inherently implausible and because it seems inconsistent with other aspects of his philosophy. This paper offers a novel account of Nietzsche's motives for that embrace—namely that Nietzsche found in eternal recurrence the only possible way to reconcile three potent and apparently conflicting convictions: (1) there are no Hinterwelten (“worlds-beyond”), (2) the great love (take joy in) all things just as they are (amor fati), (...) and (3) all joy wills eternity. The case for this account has two parts. I show first that Nietzsche was deeply committed to each of these principles at or before the time the idea of eternal recurrence “came to” him in 1881 and second that these principles, though in apparent conflict, can, as Nietzsche understood them, be reconciled by, and only by, the idea of eternal recurrence. It follows, I argue, that the idea of eternal recurrence was originally independent of Nietzsche's conceptions of the will to power and the Übermensch. (shrink)

Several philosophers—including C. S. Peirce, William James, Hilary Putnam and Crispin Wright—have proposed various versions of the notion that truth is an epistemic ideal. More specifically, they have held that a proposition is true if and only if it can be fixedly warranted by human inquirers, given certain ideal epistemic conditions. This paper offers a general critique of that idea, modeling conceptions of ideality and fixed warrant within the semantics that Kripke developed for intuitionistic logic. It is shown that each (...) of the two plausible notions of fixed warrant faces difficulties and that, moreover, “truth” defined in terms of either of them is distressingly dependent upon one’s conception of idealized inquiry and perhaps also upon one’s standards of warrant. (shrink)

What an intuitionist may refer to with respect to a given epistemic state depends not only on that epistemic state itself but on whether it is viewed concurrently from within, in the hindsight of some later state, or ideally from a standpoint “beyond” all epistemic states (though the latter perspective is no longer strictly intuitionistic). Each of these three perspectives has a different—and, in the last two cases, a novel—logic and semantics. This paper explains these logics and their semantics and (...) provides soundness and completeness proofs. It provides, moreover, a critique of some common versions of Kripke semantics for intuitionistic logic and suggests ways of modifying them to take account of the perspective-relativity of reference. (shrink)

Concern with ethical anthropocentrism has largely been confined to debates in animal and environmental ethics. Philosophers generally have shown little interest in it. Ethical egoism, by contrast, though usually rejected, has sparked wide philosophical interest. This is surprising, for the two are akin; anthropocentrism is egoism writ large - the egoism of the human species. This paper explains the kinship by articulating this analogy, shows that the analogy provides for each argument for or against ethical egoism an analogous argument for (...) or against ethical anthropocentrism, and demonstrates the analogy's fruitfulness by using it to extrapolate from an existing argument against ethical egoism a novel argument against ethical anthropocentrism. (shrink)

This paper presents an argument for metaphysical realism, understood as the claim that the world has structure that would exist even if our cognitive activities never did. The argument is based on the existence of a structured world at a time when it was still possible that we would never evolve. But the interpretation of its premises introduces subtleties: whether, for example, these premises are to be understood as assertions about the world or about our evidence, internally or externally, via (...) assertibility conditions or truth conditions – and what sorts of beings are included in the `we' upon whose cognitions the antirealist supposes the structure of the world to depend. I argue that antirealism can provide no defensible, fully articulated interpretation of the premises that either shows them not to be true or defeats the reasoning. (shrink)

Reflections on anger, despondence, and nonviolence are prompted by student responses to the 2016 election, especially given the likely implications for climate change policy. The author reflects on the value of nonviolence, environmental activism, and participation in a national climate march.

Reflections on anger, despondence, and nonviolence are prompted by student responses to the 2016 election, especially given the likely implications for climate change policy. The author reflects on the value of nonviolence, environmental activism, and participation in a national climate march.

A Land Imperiled not only illustrates the many ways in which the health of this bioregion is being affected, but also provides examples of how the damage can be ...

Moral life often presents us with trade-offs between the sufferings of some individuals and the sufferings of others. Researchers may need to consider, for example, whether the suffering imposed on animals by a certain line of medical experimentation justifies the relief that the resulting discoveries may bring to others. Often in such cases, the suffering of some individuals is incomparable with—that is neither greater than nor less than nor equal to—the suffering of others. While this complicates moral decision-making across species, (...) it does not undermine it. (shrink)

In the age of exploration western Eurasia came to dominate much of the world, in part unintentionally, via the medium of smallpox. This was domination across great spatial distances. Analogously, w...

Italian translation of "Schaum's Outline of Theory and Problems of Logic" (1988).

Extended revised edition of "Logica" (2003).

MATHEMATICAL INTUITION IS OFTEN REGARDED AS A SPECIAL FORM\nOF PERCEPTION WHOSE OBJECTS ARE ABSTRACT ENTITIES. THE\nTHESIS OF THIS PAPER IS THAT MATHEMATICAL INTUITION IS JUST\nORDINARY PERCEPTION AND IMAGINATION OF FAMILIAR OBJECTS. IT\nIS DISTINGUISHED, HOWEVER, BY ITS MODE OF\nCONCEPTUALIZATION, WHICH UTILIZES RELATIVELY FEW PREDICATES\nAND HENCE TREATS MANY DISTINCT OBJECTS AS\nINDISTINGUISHABLE.

An outline of the material covered in courses on Formal and Informal Logic. The outline includes chapters on mathematical approaches to logic as well as on fallacies, deduction and induction, probability, and other major topics. Logic is traditionally taught by means of problem solving exercises, so the subject is well suited to a Schaum's Outline approach.