I am concerned with values in the descriptive rather than in the normative sense. I am interested in theories that seek to explain one or another aspect of people's moral psychology. Why do people value what they value? Why do they have other moral reactions? What accounts for their feelings, their motivations to act morally, and their opinions about obligation, duty, rights, justice, and what people ought to do?

A moral theory like (one or another version of) utilitarianism (or social-contract theory, natural-law theory, Kantianism, or whatever) may be put forward as offering the correct normative account of justice, or of the good, or of what people ought morally to do. The answers such a theory offers may be surprising in suggesting that what people ought to do is quite different from what they think they ought to do. I am not concerned with normative moral theories of this revisionary sort. Indeed, I am interested in less revisionary normative theories only to the extent that they can be reinterpreted as offering potential explanations of people's actual moral reactions.

Writers of very different persuasions have relied on arguments about self-ownership; in recent years, it is libertarians who have rested their political theory on self-ownership, but Grotian authoritarianism rested on similar foundations, and, even though it matters a good deal that Hegel did not adopt a full-blown theory of self-ownership, so did Hegel's liberal-conservatism. Whether the high tide of the idea has passed it is hard to say. One testimony to its popularity was the fact that G. A. Cohen for a time thought that the doctrine of self-ownership was so powerful that an egalitarian like himself had to come to terms with it; but he has since changed his mind. I have tackled the topic of self-ownership glancingly elsewhere, but have not hitherto tried to pull together the observations I have made in passing on those occasions. The view I have taken for granted and here defend is that self-ownership is not an illuminating notion—except in contexts that are unattractive to anyone of libertarian tastes.

This essay deals with property rights in body parts that can be exchanged in a market. The inquiry arises in the following context. With some exceptions, the laws of many countries permit only the donation, not the sale, of body parts. Yet for some years there has existed a shortage of body parts for transplantation and other medical uses. It might then appear that if more sales were legally permitted, the supply of body parts would increase, because people would have more incentive to sell than they currently have to donate. To allow sales is to recognize property rights in body parts. To allow sales, however, makes body parts into “commodities”—that is, things that can be bought and sold in a market. And some view it as morally objectionable to treat body parts as commodities.

A society is culturally plural when it contains a variety of cultural groups. A common view is that just societies are likely to be culturally plural. This view assumes that human beings have rights to remain in the cultures in which they were born, or even to adopt whatever culture they choose. It is also widely believed that cultural pluralism tends to have good consequences. For example, many people suppose that the variety of cultures in a culturally plural society adds savor and interest to the lives of its inhabitants. This view evidently assumes that culture is a consumer good. Another view that cultural pluralism tends to have good consequences rests on the premise that each culture has claims to moral knowledge.