Charles Sumner is mainly known as the abolitionist statesman who suffered a brutal caning on the Senate floor by the proslavery congressman Preston Brooks in 1856. This violent episode has obscured Sumner’s status as the most passionate champion of equal rights and multiracial democracy of his time. A friend of Alexis de Tocqueville, an ally of Frederick Douglass, and an adviser to Abraham Lincoln, Sumner helped the Union win the Civil War and ordain the Emancipation Proclamation, the Thirteenth Amendment, the Freedmen’s Bureau, and the Civil Rights Act of 1875. In this comprehensive but fast-paced narrative, Zaakir Tameez presents Sumner as one of America’s forgotten founding fathers, a constitutional visionary who helped to rewrite the post–Civil War Constitution and give birth to modern civil rights law.