This edited volume explores the principle of solidarity in international and EU law. Although the concept is regularly invoked in international and EU legal and policy debates alike, its meaning, nature, functions, as well as normative contours still remain nebulous. As the chapters of this book show, the debate on solidarity is premised on conflicting visions regarding the values underpinning the international legal order as well as the self-interest or community-oriented driving forces behind States’ action at the international level. The regional (EU law) perspective offers a new lens through which to revisit classic questions pertaining to the nature of modern international law and to assess its continuing relevance in a world of regional organizations presenting different visions (and levels) of co-operation. weiterlesen