 A related objection concerns the specification of the society to which moral justification or truth are said to be relative. People typically belong to many different groups defined by various criteria: culture, religion, political territory, ethnicity, race, gender, etc. Moreover, while it is sometimes claimed that the values of a group defined by one of these criteria have authority for members of the group, such claims are often challenged. The specification of the relevant group is itself a morally significant question, and there appears to be no objective map of the world that displays its division into social groups to which the truth or justification of moral judgments are relative. A proponent of MMR needs a plausible way of identifying the group of persons to which moral truth or justification are relative.