While slavery is often at the heart of debates over the causes of the Civil War, historians are not agreed on precisely what aspect of slavery-with its various

From workers' wages to presidential elections, labor unions once exerted tremendous clout in American life. In the immediate post-World War II era, one in three

NATIONAL BESTSELLER • NATIONAL BOOK AWARD FINALIST • An "extraordinary ... profoundly moving" history (The New York Times Book Review) of the American Civil