Richard Haass, Thierry de Montbrial, Robin Niblett, and Carlos Ivan Simonsen Leal discuss how think tanks can stay relevant and credible in a time when distrust of experts is rampant. The conversation marks the centennial of the meeting between British and American delegates to the Paris Peace Conference that conceived the idea of an Anglo-American institute of foreign affairs to study international problems with a view toward preventing future wars, and eventually established Chatham House and the Council on Foreign Relations.