This book is based on the proceedings from a conference at the European University Institute in Florence. It deals with new approaches to supra- and transnational law generating structures. These new approaches - namely Christian Joerges' theoretical concept based upon the conflict of laws methodology and additional ideas of constitutional pluralism, and of participatory transnational governance - are discussed from private, public, and international law perspectives. They strive to conceptualize - in legal categories - the efforts to re-constitute democratic governing in post-national constellations. The book finds new ways for a democratization of European and transnational governance outside traditional models, and more convincing ways of a European and transnational 'juridification' that reconciles democracy, diversity, and social rights.