EAI, The World Top Fifty Security and International Affairs Think Tanks
For this index, 6,545 institutions from 182 countries around the world and over 6000 individuals were invited of which 1,500 individuals participated. A total of 5,329 think tanks were chosen and organized into 30 categories. This index was further refined and organized by a group of 793 experts. In the final process, 202 think tanks were selected as the world’s top think tanks.