"[P]roponents of the right can simply assert the existence of a right to privacy and, equally validly, opponents can assert a “right to know”. An impasse is then reached because there is no underlying principle that can be invoked to provide guidance on the issue. As with many rights, the victor may unfortunately be the side which simply yells the loudest. This may seem to be unduly dismissive of rights-based theories and pay inadequate regard to the considerable moral reforms that have occurred against the backdrop of rights talk over the past half-century. There is no doubt that rights claims have proved to be an effective lever in bringing about social change. As Campbell correctly notes, rights have provided “a constant source of inspiration for the protection of individual liberty”. For example, reoognition of the (universal) right of liberty resulted in the abolition of slavery; more recently the right of equaliy has been used as an effective weapon by women and other disenfranchised groups. For this reason, it is accepted that there is an ongoing need for moral discourse in the form of rights. For this reason, it is accepted that there is an ongoing need for moral discourse in the form of rghts. There is so even in deontological rights-based moral theories (with their absolutist overtones) are incapable of providing answers to questions such as the existence and content of proposed rights, and even if rights are difficult to defend intellectually or are seen to be culturally biased. There is a need for rights-talk, at least at the “edges of civilisation and in the tangle of international politics”.32. Still the significant changes to the moral landscape for which non-consequentialist rights have provided the catalyst must be accounted for."