Heather Cox Richardson is Professor of History at Boston College and an expert on American political and economic history. She is the author of six books on American politics including, most recently, How the South Won the Civil War: Oligarchy, Democracy and the Continuing Fight for the Soul of America. She is a leading #Twitterstorian, explaining the historical background of modern political issues through Twitter threads, the co-editor of We’re History, a web magazine of popular history, and the author of Letters from an American, a chronicle of American politics.