I’ve been working on a book for nearly 10 years. Recently, I’ve added a chapter on the importance of international cooperation and the lessons postwar policymakers learned from two world wars and the Great Depression. In short, these catastrophic events taught them to reject a zero-sum view of the world and guided them instead to create the U.N., the IMF, the World Bank and other organizations to enhance stability and global cooperation, institutions dedicated to the proposition that the problems we face are beyond the capacity of any one nation acting alone to fix or combat. While researching, I came across this film. I think it is a reminder of both the tragic destruction of the 20th Century and the need to keep those memories alive so that they can guide us in the present and as we chart a course for the future.