This book presents a discussion on the influence of human rights on international law. Why and how, if so, does human rights law influence other parts of international law or the basic structure of international law as a whole? Is there a streamlining effect resulting from human rights law that leads to the constitutionalization of international law? The book is based on the proceedings of a research workshop held in Tbilisi (Georgia) in September 2012. French, Georgian, and German researchers met, had vivid discussions, and learned from each other on this very important subject. The research workshop was funded by the German-Franco-University and supported by our home universities. We are very grateful to the Springer International Publishing house for its continuing support in helping to realize this book. We owe particular thanks to Adda Grauert and Malteˆ Goetz for their valuable assistance in this project.