 In addition, some feminists are directly critical of the role of rights. Feminists associated with the critical legal studies movement, for example, see rights as potentially masking underlying relationships of power and domination (Scales 1986). Other feminists, such as those associated with critical race theory, voice concerns that dominance feminists assume an essentialism that silences the voices of African-American women (Harris 1990) and that rights may provide crucial protection to victims of discrimination and oppression (Williams 1992). Similar debates concern rights in international law with liberal feminists defending the gains achieved through the international recognition of human rights and critical theorists joining with some third world feminists to decry the structural bias of international law and the role of rights in continuing to mask oppression (Engle 2005; Otto 2005). 