My thesis is that morality arises when a group of people reach an implicit agreement or come to a tacit understanding about their relations with one another. Part of what I mean by this is that moral judgments - or, rather, an important class of them - make sense only in relation to and with reference to one or another such agreement or understanding. This is vague, and I shall try to make it more precise in what follows. But it (...) should be clear that I intend to argue for a version of what has been called moral relativism. (shrink)

The idea that there is such an analytic connection will hardly come as news. It amounts to no more and no less than an endorsement of the claim that all reasons are 'internal', as opposed to 'external', to use Bernard Williams's terms (Williams 1980). Or, to put things in the way Christine Korsgaard favours, it amounts to an endorsement of the 'internalism requirement' on reasons (Korsgaard 1986). But how exactly is the internalism requirement to be understood? What does it tell (...) us about the nature of reasons? And where-in lies its appeal? My aim in this paper is to answer these ques- tions. (shrink)