Introduction; Realizing the human experience: vulnerability and human suffering; International relations and modern institutional design: locating the isolated individual; The morality of natural law and international relations: establishing a tradition of influence; Thomas Aquinas and the morality of natural law; A relational account of 'the political' agency, community and loving reasonableness; The morality of natural law and international politics: unbounded moral communities and collective moral agency; Epilogue; Bibliography; Index.