This research develops the social psychological study of lay perception of human rights and of rights-based reactions to perceived injustice. The pioneering work by social representation theorists is reviewed. Of particular interest is the use of rights-based responses to perceived relative subgroup disadvantage. It is argued that these responses are shaped by the historical development of the legal concept of unique subgroup rights; rights asserted by a subgroup that cannot be asserted by outgroup members or by members of a broader collective that includes all subgroups. ¶ ...