  The concept of discrimination picks out a kind of moral wrong that is a function of the salient social group membership of the person wronged: persons are treated as though they had diminished or degraded moral status on account of their group membership, or they are, because of their group membership and the relative disadvantages that they suffer due to that membership, made vulnerable to domination and oppression.  But why have such a concept? Why not simply have the concepts of domination, oppression, and degrading treatment, abstracting from whether or not the reasons for such wrongs involve group membership?