 Whether such an account can succeed in providing a constitutive explanation of normativity depends on whether the normativity of these standards of rational willing can be given a constitutive explanation. For these standards are viewed as normative constraints on willing, and rationality here is taken to be normative. So if the nature of normativity is what we are trying to explain, we haven’t succeeded if our account rests on the assumption that there are normative constraints on willing.