 Scanlon also says that a person can have a reason for rejecting a principle if it treats them unfairly, say by benefitting some but not others for arbitrary reasons. This presupposes a norm of fairness that the contractarian theory does not itself attempt to explain or justify. So it looks as though the purpose of the theory is to provide a distinctive account of moral reasoning (and moral motivation) but not to defend any substantive principles of distributive justice. In this respect, Scanlon’s contractualism is less ambitious than either Gauthier’s or Rawls’.