…according to the 2015 Global Go To Think Tank Index Report an annual ranking produced by The Think Tanks and Civil Societies Program (TTCSP) at the University of Pennsylvania. It includes global, regional and thematic rankings with details on the methodology use. All reports from 2008 onwards are also accessible on the website.
Lists are compiled by consulting NGOS, journalists and policy makers on the most influential and highly regarded.
Chatham House: The Royal Institute of International Affairs promotes the understanding of major international issues. There is a link to their website from our International security page: http://www2.le.ac.uk/library/find/subjects/politics/security