In human rights practice, references to 'dignity' are as pervasive as they are difficult to pin down. 'Dignity' is used widely and often contradictorily. It underlies the privileged legal treatment afforded to states as a result of their sovereignty, but also the claims to strip states and state officials of the manifestations of such sovereignty, such as immunities. It also grounds the overriding character of human rights and social development, while at the same time adding legitimacy to the fight against 'anthropocentrism' and for the protection of nature for its own sake. From 'sovereignty', to 'human dignity', to 'eco-centrism', the concept of dignity underlies the normative claims of three competing circles. In this review essay, we rely on the distinction between these three circles of dignity to organize the survey and discussion of an extensive body of work that has helped to clarify the contours of the concept of 'dignity'. The essay aims to empower practitioners not only to avoid the abuse of this concept but also the dilution that may result from casual and unconsidered reference to it. More fundamentally, it explores two conceptual battlefronts opened by the concept of human dignity. These battlefronts are interdependent because the very assertion of human dignity to protect the individual against the powers of the state may also lay the foundations for an overexploitation of nature.