The introductory and synthesis chapters present the methodological approach and discuss the findings. Other chapters analyze changes in dam policies in the big hydropower states Brazil, China, India and Turkey; the role of non-governmental organizations in advocating against the Turkish Ilisu Dam project on the Tigris River; the strategies of International Rivers and World Wildlife Fund for Nature in the global hydropower game; the policies of the German government and its positioning in the dam debate, and the engagement of Chinese actors in building the Bui Dam (Ghana) and the Kamchay Dam (Cambodia).