1776, 1861, 1929. Any high-school student should know what these years meant to American history. But wars and economic disasters are not our only pivotal events, and other years have, in a quieter way, swayed the course of our nation. 1831 was one of them, and in this striking new work, Louis Masur shows us exactly how. The year began with a solar eclipse, for many an omen of mighty changes -- and for once, such predictions held true. Nat Turner's...