 Justice takes a comparative form when to determine what is due to one person we need to look at what others can also claim: to determine how large a slice of pie is rightfully John’s, we have to know how many others have a claim to the pie, and also what the principle for sharing it should be – equality, or something else. Justice takes a non-comparative form when we can determine what is due to a person merely by knowing relevant facts about that particular person: if John has already been promised the whole of the pie, then that is what he can rightfully claim for himself. Some theories of justice seem to imply that justice is always a comparative notion – for example when it is said that justice consists in the absence of arbitrary inequality – whereas others imply that it is always non-comparative. But conceptually, at least, both forms seem admissible; indeed we can find cases in which it appears we have to choose between doing justice comparatively and doing it non-comparatively (see Feinberg 1974; for a critical response, see Montague 1980). For example, we might have several candidates all of whom are roughly equally deserving of an academic honour, but the number of honours we are permitted to award is smaller than the number of candidates. If we honour some but not others, we perpetrate a comparative injustice, but if to avoid doing so we honour no-one at all, then each is treated less well than they deserve, and so unjustly from a non-comparative perspective.