At the start of the 1860 presidential campaign, a handful of fired-up young Northerners appeared as bodyguards to defend anti-slavery stump speakers from frequent attacks. The group called themselves the Wide Awakes. Soon, hundreds of thousands of young white and black men, and a number of women, were organizing boisterous, uniformed, torch-bearing brigades of their own. These Wide Awakes—mostly working-class Americans in their twenties—became one of the largest, most spectacular, and most influential political movements in our history. To some, it demonstrated the power of a rising majority to push back against slavery. To others, it looked like a paramilitary force training to invade the South.

Today’s guest, Jon Grinspan (author of “Wide Awake: The Forgotten Force That Elected Lincoln and Spurred the Civil War”) examines how exactly our nation crossed the threshold from a political campaign into a war. We look at the precarious relationship between violent rhetoric and violent actions.