In the target article, we presented the hypothesis that parasite-stress variation was a causal factor in the variation of in-group assortative sociality, cross-nationally and across the United States, which we indexed with variables that measured different aspects of the strength of family ties and religiosity. We presented evidence supportive of our hypothesis in the form of analyses that controlled for variation in freedom, wealth resources, and wealth inequality across nations and the states of the USA. Here, we respond to criticisms (...) from commentators and attempt to clarify and expand the parasite-stress theory of sociality used to fuel our research presented in the target article. (shrink)

Evolutionary accounts of the origins of human morality may lead us to doubt the truth of our moral judgments. Sidgwick tried to vindicate ethics from this kind of external attack. However, he ended The Methods in despair over another problem—an apparent conflict between rational egoism and universal benevolence, which he called the “dualism of practical reason.” Drawing on Sidgwick, we show that one way of defending objectivity in ethics against Sharon Street’s recent evolutionary critique also puts us in a position (...) to support a bold claim: the dualism of practical reason can be resolved in favor of impartiality. (shrink)

We present a unified empirical and philosophical account of moral consistency reasoning, a distinctive form of moral reasoning that exposes inconsistencies among moral judgments about concrete cases. Judgments opposed in belief or in emotion and motivation are inconsistent when the cases are similar in morally relevant respects. Moral consistency reasoning, we argue, regularly shapes moral thought and feeling by coordinating two systems described in dual process models of moral cognition. Our empirical explanation of moral change fills a gap in the (...) empirical literature, making psychologically plausible a defensible new model of justified moral change and a hybrid theory of moral judgment. (shrink)

This paper shows that moral progress is a substantive and plausible idea. Moral progress in belief involves deepening our grasp of existing moral concepts, while moral progress in practices involves realizing deepened moral understandings in behavior or social institutions. Moral insights could not be assimilated or widely disseminated if they involved devising and applying totally new moral concepts. Thus, it is argued, moral failures of past societies cannot be explained by appeal to ignorance of new moral ideas, but must be (...) understood as resulting from refusals to subject social practices to critical scrutiny. Moral philosophy is not the main vehicle for disseminating morally progressive insights, though it has an important role in processes that lead to moral progress. Yet we have grounds for cautious optimism, since progressive moral insights can be disseminated and can, sometimes, have constructive social effects. (shrink)

The distinctive aim of applied ethics is to provide guidance as to how we ought to act, as individuals and as shapers of social policies. In this essay, I argue that applied ethics as currently practiced is inadequate and ought to be transformed to incorporate what I shall call social moral epistemology. This is a branch of social epistemology, the study of the social practices and institutions that promote the formation, preservation, and transmission of true beliefs. For example, social epistemologists (...) critically evaluate the comparative advantages of adversarial versus inquisitorial criminal proceedings as mechanisms for the discovery of truth. (shrink)

Traditional conservative arguments against the possibility of moral progress relied on underevidenced assumptions about the limitations of human nature. Contemporary thinkers have attempted to fill this empirical gap in the conservative argument by appealing to evolutionary science. Such “evoconservative” arguments fail because they overstate the explanatory reach of evolutionary theory. We maintain that no adequate evolutionary explanation has been given for important features of human morality, namely cosmopolitan and other “inclusivist” moral commitments. We attribute these evolutionarily anomalous features to a (...) capacity for open-ended normativity, which presents a serious obstacle to theorists who wish to draw substantive moral and political lessons from human evolutionary history. (shrink)

The distinctive aim of applied ethics is to provide guidance as to how we ought to act, as individuals and as shapers of social policies. In this essay, I argue that applied ethics as currently practiced is inadequate and ought to be transformed to incorporate what I shall call social moral epistemology. This is a branch of social epistemology, the study of the social practices and institutions that promote the formation, preservation, and transmission of true beliefs. For example, social epistemologists (...) critically evaluate the comparative advantages of adversarial versus inquisitorial criminal proceedings as mechanisms for the discovery of truth. (shrink)