  According to the account on offer in this entry, discrimination wrongfully imposes relative disadvantages or deprivations on persons based on their membership in some salient social group. But which salient groups count for the purpose of determining whether an act is an act of discrimination? This question is at the heart of many heated political and legal disputes, such as the controversies over the rights of gays and trans persons. The question is also central to a matter that is less politically prominent than such disputes but which has important political and philosophical implications. The question is whether or not the members of socially dominant groups can, in principle, be victims of discrimination. It is sometimes said that, in the United States and other Western countries, whites cannot really be discriminated against on account of their race, because whites are the socially dominant racial group whose members are systematically advantaged by their being white. Thus, in his account of racial discrimination, Scanlon acknowledges that his view entails that, in the U.S., at least, whites can discriminate against blacks but not vice-versa. He holds that discrimination is “unidirectional, [applying] only to actions that disadvantage members of a group that has been subject to widespread denigrations and exclusion.” This implication derives from his claim that it is “crucial to racial discrimination … that the prejudicial judgments it involves are not just the idiosyncratic attitudes of a particular agent but are widely shared in the society in question and commonly expressed and acted on in ways that have serious consequences” (2008: 73–74). The idea that discrimination is unidirectional is also implied by Fiss’s understanding of discrimination in terms of “the perpetual subordination” of “specially disadvantaged groups …[whose] political power is severely circumscribed” (1976: 154–155).