Explore how human rights instruments have audiences and constituencies narrower than humanity itself. The constituency of human rights instruments-those for whom the instruments speak-are the worst off internationally with respect to different rights. The audience of human rights instruments-those whom the instruments address-are again narrower than humanity. Audience and constituency, but especially constituency, are more important to the justification of human rights than the domain of human rights instruments-humanity itself. The notions of the worst off in a jurisdiction and the Worst Off internationally require empirical measures that are partially sketched. Reprinted by permission of Carfax Publishing, Taylor & Francis Ltd.