Book excerpt: In this elegant book, the Pulitzer Prize-winning writer explores the manifold ways in which the Civil War changed the United States forever. He confronts its costs, not only human (six hundred thousand men killed) and economic (beyond reckoning) but social and psychological. He touches on popular misconceptions, including some concerning Abraham Lincoln and the issue of slavery. The war in all its facets "grows in our consciousness," arousing complex emotions and leaving "a gallery of great human images for our contemplation."