Linda Colley is Shelby M.C. Davis 1958 Professor of History at Princeton University in the United States. She previously taught at Yale, LSE, and Cambridge, and she has written on a variety of subjects under the umbrella of British national and imperial history. In this episode, she places the current state of the British and European unions into historical perspective. She also discusses the discipline of global history and shares insights into her newest book, a study of constitutions and constitution-making.