 The Contractualist answer appeals to the conceptual link between wrongness and justification. Whether an act is wrong depends, not only on its direct impact on individuals, but also on whether a principle permitting it can be justified to all concerned. ‘Because it is wrong’ is not the kind of reason that can be fed into the contractualist apparatus, since it is not something that happens to individuals. Instead, wrongness is something that is constructed out of individuals’ reasons using that very apparatus. The same goes for ‘because it is unfair’. In the example of the racist principle introduced in section 3.2, I reject the principle, not because it treats me unfairly overall, but because it illicitly places weight on an inappropriate moral distinction. My complaint concerns how a principle treats me. To know whether an action is wrong, we must compare different people’s complaints, which we do by comparing one principle’s treatment of me with the way alternative principles treat others.