The chapter focuses on the internationalization of the international system as a way to pursue a stronger justice agenda at the international level. In this regard, a key aspect of Delmas-Marty deals with pluralism. In this regard Delmas-Marty argues that such pluralism is both underway and in need of being strengthened and encouraged. Delmas-Marty pursues the development of a conception of the national interest that is more solidarity oriented. Most important for the future of international law and world order, we have to find a better balance between competition and cooperation, and ensure that solidarity and responsibility are values and principles that prevail.