Current Perspectives in Philosophy of Biology.

Contrary to widely held assumptions, an evolutionary metaethics need not be non-cognitivist. I define evolutionary metaethics as the claim that certain phenotypic traits expressing certain genes are both necessary and sufficient for explanation of all other phenotypic traits we consider morally significant. A review of the influential cognitivist Immanuel Kants metaethics shows that much of his ethical theory is independent of the anti-naturalist metaphysics of transcendental idealism which itself is incompatible with evolutionary metaethics. By matching those independent aspects to an (...) evolutionary metaethics a cognitivist Kantian evolutionary metaethical theory is a possibility for researchers to consider. (shrink)

In this commentary on Lewens, I argue that although his criticisms of Machery's conception of human nature are sound, I disagree with his conclusion that human nature cannot inform us regarding issues of human enhancement. I introduce a framework for understanding human nature, the “life history trait cluster account,” which aligns the concept of human nature with the human sciences and allows human nature to inform questions of human enhancement.

One promising way to investigate the genealogy of norms is by considering not the origin of norms, but rather, what makes certain norms more likely to prevail. Emotional responses, I maintain, constitute one important set of mechanisms that affects the cultural viability of norms. To corroborate this, I exploit historical evidence indicating that 16th century etiquette norms prohibiting disgusting actions were much more likely to survive than other 16th century etiquette norms. This case suggests more broadly that work on cultural (...) evolution should pay greater attention to the role of emotion systems in cultural transmission. (shrink)

Darwin’s treatment of morality in The Descent of Man has generated a wide variety of responses among moral philosophers. Among these is the dismissal of evolution as irrelevant to ethics by Darwin’s contemporary Henry Sidgwick; the last, and arguably the greatest, of the Nineteenth Century British Utilitarians. This paper offers a re-examination of Sidgwick’s response to evolutionary considerations as irrelevant to ethics and the absence of any engagement with Darwin’s work in Sidgwick’s main ethical treatise, The Methods of Ethics . (...) This assessment of Sidgwick’s response to Darwin’s work is shown to have significance for a number of ongoing controversies in contemporary metaethics. (shrink)

Arguments about the relationship between science and religion often proceed by identifying a set of essential characteristics of scientific and religious worldviews and arguing on the basis of these characteristics for claims about a relationship of conflict or compatibility between them. Such a strategy is doomed to failure because science, to some extent, and religion, to a much larger extent, are cultural phenomena that are too diverse in their expressions to be characterized in terms of a unified worldview. In this (...) paper I follow a different strategy. Having offered a loose characterization of the nature of science, I pose five questions about specific areas where religious and scientific worldviews may conflict - questions about the nature of faith, the belief in a God or Gods, the authority of sacred texts, the relationship between scientific and religious conceptions of the mind/soul, and the relationship between scientific and religious understandings of moral behavior. My review of these questions will show that they cannot be answered unequivocally because there is no agreement amongst religious believers as to the meaning of important religious concepts. Thus, whether scientific and religious worldviews conflict depends essentially upon whose science and whose religion one is considering. In closing, I consider the implications of this conundrum for science education. (shrink)

When making moral judgments, people are typically guided by a plurality of moral rules. These rules owe their existence to human emotions but are not simply equivalent to those emotions. And people’s moral judgments ought to be guided by a plurality of emotion-based rules. The view just stated combines three positions on moral judgment: [1] moral sentimentalism, which holds that sentiments play an essential role in moral judgment,1 [2] descriptive moral pluralism, which holds that commonsense moral judgment is guided by (...) a plurality of moral rules2, and [3] prescriptive moral pluralism, which holds that moral judgment ought to be guided by a plurality of moral rules. In what follows, we will argue for all three positions. We will not present a comprehensive case for these positions nor address many of the arguments philosophers have developed against them. What we will try to show is that recent psychological work supports sentimentalist pluralism in both its descriptive and prescriptive forms. (shrink)

The central question for this dissertation is, how do we do moral philosophy well from within a broadly naturalist framework? Its main goal is to lay the groundwork for a methodological approach to moral philosophy that integrates traditional, intuition-driven approaches to ethics with empirical approaches that employ empirical data from biology and cognitive science. Specifically, it explores what restrictions are placed on our moral theorizing by findings in evolutionary biology, psychology, neuroscience, and other fields, and how we can integrate this (...) data while still offering a fully normative account of ethics. To that end, the dissertation explores the methodological assumptions behind both traditional and more empirical or experimental approaches to ethics, to find where these assumptions cannot be properly supported and need to be re-examined. Chapter 1 explores the science-based objections that have been raised to traditional approaches, with a particular focus on questions concerning the reliability of moral intuitions. Chapter 2 examines three fundamental assumptions supporting the empirical approach to moral philosophy, and how those assumptions ultimately do not fit with how we ought to understand the project of ethics. In chapter 3, I discuss the fact/value distinction, and the restrictions that are placed on our moral theorizing by our commitment to this distinction. Chapter 4 offers a defense of ‘companions in guilt’ arguments, and uses these arguments to draw an analogy between moral philosophy and epistemology that will be used to help defend moral philosophy against empirical debunking arguments. Chapter 5 explores the ways in which epistemologists’ methods of incorporating empirical data into their research while maintaining the normativity of their accounts can be adapted to allow moral philosophers to do the same, and brings together the various methodological concerns addressed up to this point to lay out a methodological approach I call empirically-informed moral philosophy. (shrink)

The three integrated articles of this dissertation are concerned with the epistemic status of moral intuitions. The first article argues in favour of moderate moral intuitionism, the view that while any successful moral epistemology must be intuitionist to at least some extent, it must also take intuitions to be fallible. This is accomplished by synthesizing work by Robert Audi and George Bealer into a view of moral intuitions which is capable of overcoming some major contemporary objections against intuitionism, particularly from (...) Sharon Street and Peter Singer. The next article raises a more powerful objection to intuitionism, applying feminist ethics and moral epistemology to suggest that powerful social forces impair our ability to distinguish mistaken intuitions from reliable ones. This objection is addressed with an argument, based on work by Michele Moody-Adams and Cheshire Calhoun, to the effect that the possibility of moral knowledge and resultant responsibility allow us to retain the capacity for making this important distinction between intuitions. Nevertheless, as George Sher argues, there is still reason to think that the intuitions we rely on to shape and justify our moral beliefs contains important mistakes which negatively impact the reliability of our resulting moral judgements. This major problem, that of distinguishing helpful from harmful moral intuitions, is the topic of the third article. Henry Sidgwick attempted to develop a decision procedure for this purpose in The Methods of Ethics, positing four major criteria, the fulfilment of which would confer the highest possible level of certainty on an intuition. Sidgwick's four tests are evaluated primarily with reference to contemporary feminist scholarship, and though they constitute a promising start to a rigorous intuitionist moral epistemology, they are also wanting in a number of ways. The article improves the epistemic status of Sidgwick's tests with a hybrid Sidgwickian-feminist theory, reinterpreting his tests as values to be respected but which allow flexibility and even tension. While this approach may not be able to confer the same level of certainty as Sidgwick's, it is more respectful of the complexities and nuances of a more reliable moral epistemology. (shrink)