Contributor(s): Professor Michael Cox | On July 21st, 2021, The Phelan US Centre’s Chris Gilson spoke to Professor Michael Cox of LSE IDEAS about his new article in the journal, International Politics, “What do Think Tanks do? Chatham House in search of the United States” and how think tanks affect policymaking in the UK and the US. They also discuss his upcoming book of essays Agonies of Empire, which outlines the ways in which five very different American Presidents have addressed the complex legacies left them by their predecessors while dealing with the longer-term problems of running a modern-day empire under increasing stress. This Extra Inning was produced Chris Gilson, Michaela Herrmann, and Elina Ganatra. Professor Michael Cox is the Founding Director of LSE IDEAS. He was appointed to a Chair at the LSE in 2002, having previously held positions in the UK at The Queen's University of Belfast and the Department of International Politics, Aberystwyth. He helped establish the Cold War Studies Centre at the LSE in 2004 and later co-founded LSE IDEAS in 2008 with Arne Westad.