From Oxford University's Rothermere American Institute, hosts Professor Adam Smith and Dr Alice Kelly talk to guests doing world-leading research that sheds light on the United States from the outside in. We ask what forces have shaped the culture and politics of the US, how its role in the world has changed and what it might be in the future. Is America now, or has it ever been, the "last best hope of earth"? Probably not, but plenty of people have thought so. We try to understand why.