It is widely accepted, by both friends and foes of animal rights, that contractarianism is the moral theory least likely to justify the assigning of direct moral status to non-human animals. These are not, it is generally supposed, rational agents, and contractarian approaches can grant direct moral status only to such agents. I shall argue that this widely accepted view is false. At least some forms of contractarianism, when properly understood, do, in fact, entail that non-human animals possess direct moral (...) status, independently of their utility for rational agents, and independently of whatever interests rational agents may have in them. The version of contractarianism I shall focus upon is that defended by John Rawls. (shrink)

This paper defends “moral individualism” against various arguments that have been intended to show that membership in the human species or participation in our distinctively human form of life is a sufficient basis for a moral status higher than that of any animal. Among the arguments criticized are the “nature-of-the-kind argument,” which claims that it is the nature of all human beings to have certain higher psychological capacities, even if, contingently, some human beings lack them, and various versions of the (...) idea that there is a special form of life that all human beings share but of which no animal can be a full participant. The paper concludes that none of these arguments succeeds in demonstrating that there are moral reasons to permit animals to be treated less well than members of our own species whose psychological capacities and potential are no higher than those of the animals. (shrink)

In this paper I will examine two responses to the argument from marginal cases; the argument from kinds and the similarity argument. I will argue that these arguments are insufficient to show that all humans have moral status but no animals do. This does not prove that animals have moral status but it does shift the burden of proof onto those who want to maintain that all humans are morally considerable, but no animals are.