 Disability also presents difficult issues as a social or group identity: roughly, a central part of the way an individual understands, presents, or values herself. This aspect of disability has been made salient by the civil rights movement that established disability as an important category in antidiscrimination law. Theories that assess justice in terms of the distribution of resources or opportunities have sometimes been criticized for failing to take adequate account of such identities. But the embrace of social identity as a component of justice can be equally problematic.