Our guest is Adam Tooze, a professor of history at Columbia University and the author of "Crashed," which was a New York Times Notable Book of 2018 and one of The Economist's Books of the Year. His timely new book, which he tells us about, mixes finance, politics, business, economics, medicine, and recent world history in order to trace what went wrong -- and why -- during the turning-point year that was 2020. This new book is "Shutdown: How Covid Shook the World's Economy." As was noted by