Moral relativism, as I understand it, is the claim that there is not a single objectively true morality but only many different moralities, just as there is not a single true language but only many different languages. Different people may have different moralities as reflected in the way they act and the ways they react to the actions of others and there is no objective way to show that one of...

Fodor (1983) claims that the modularity of mind (the relatively encapsulated, insulated, special-purpose nature of the psychological mechanisms of perception) helps undermine relativism in various forms. I shall show first, that the modular vision of mind provides insufficient support for the rejection of (most forms of) relativism, and second, that an alternative (‘neural constructivist’) mode...