Think tanks have become increasingly important in American politics foreign policy. In the last thirty years think tanks have emerged as major actors on the political stage, comparable in influence to large interest groups, political parties, and government agencies. In the same time span these think tanks have replaced universities as the main source for new policy ideas and the background research and arguments to justify them. This book discusses think tanks in general but focuses specifically on the Foreign Policy Research Institute (FPRI) in Philadelphia. Though a smallish ‘tank, ‘ FPRI has been enormously influential, feeding its ideas into government and policy debate even at the level of presidential politics. The author discusses FPRI within the context of the growing influence of presidential politics. The author discusses FPRI within the context of the growing influence of think tanks over public policy in general and foreign policy in particular.