As America’s partisan divide becomes ever wider, deeper, and angrier, many Americans from both red and blue tribes are increasingly worried about the possibility of a new civil war. Jeremi Suri, a professor of Public Affairs and History at the University of Texas at Austin, says that these worries are in a sense misplaced “because the Civil War never fully ended. Its lingering embers have burst into flames at various times, including our own.” Suri gained his scholarly reputation writing books contemporary politics and foreign policy, but the events of recent years, starting with Donald Trump’s election as president in 2016, led him to cast his frame of historical reference back to the Civil War of 1861-65 and its aftermath. The roots of the rage behind the January 6, 2021 assault on the U.S. Capitol, in his view, go back to the cataclysmic conflict of the nineteenth century and resistance to the postwar Reconstruction of the defeated South. Through a deep analysis of key individuals during that period, as well as events including President Andrew Johnson’s 1868 declaration of amnesty for Confederates and the disputed presidential election of 1876, he finds parallels and precedents for the rhetoric and actions that run through much of today’s politics. Reconstruction’s end brought a halt to efforts by Republican presidents Abraham Lincoln and Ulysses S. Grant to create a more racially inclusive democracy. The unfinished work of that second Founding continues to this day, and continues to meet with similar resistance to what was seen in the nineteenth century, including widespread claims of election fraud and a growing willingness to use violence to attain political ends. This podcast discussion also touches on present-day battles over how to teach American history as well as what Suri’s study of the nineteenth century suggests about possible twenty-first-century reforms to remedy flaws in the design of our constitutional structure.