Hope is a precious resource. But, deluded, not based on a sober appraisal of the relevant realities, hope can also be lethal. One kind of hope is utopian hope. It does not exhaust what social hope is, or should be, about. The hope of remedying the most terrible injustices makes an urgent call on our attention. The world has travelled some way from the time when tyrannical governments could act with impunity in dealing with those under their jurisdiction. But it has not travelled far enough. There remain a number of deficits in the system of international law: "thresholds of inhumanity".