Abstract

Different forms of ethical naturalism are distinguished, and the possibility of a blockbuster argument against all of them at once is raised. Moore’s Open Question Argument proves insufficient; more recent anti-naturalist arguments by Derek Parfit are outlined. It is necessary to get a clearer view of what normativity is before one can decide whether naturalism abolishes normativity, as Parfit claims. An initial account of normativity is therefore given, and the prospects of a blockbuster argument are reconsidered.