Book excerpt: The 1850s offered the last remotely feasible chance for the United States to steer clear of Civil War. Yet fundamental differences between North and South about slavery and the meaning of freedom caused political conflicts to erupt again and again throughout the decade as the country lurched toward secession and war. The Shattering of the Union is a concise, readable analysis and survey of the major ideas and events that resulted in the Civil War. The first scholarly synthesis of America's final antebellum decade to be published in more than twenty years, this essential overview incorporates methods and findings by recognized historians on politics, society, race relations, ideology, and slavery. This book is a fascinating look at one of the pivotal decades in U.S. history.