We live in a human-rights world. The language of human-rights claims and numerous human-rights institutions shape almost all aspects of our political lives, yet we struggle to know how to judge this development. Scholars give us good reason to be both supportive and sceptical of the universal claims that human rights enable, alternatively suggesting that they are pillars of cross-cultural understanding of justice or the ideological justification of a violent and exclusionary global order. All too often, however, our evaluations of our human-rights world are not based on sustained consideration of their complex, ambiguous and often contradictory consequences. This volume argues that human rights are only as good as the ends they help us realise. We must attend to what ethical principles actually do in the world to know their value.