This collection of essays investigates the specific logistical, political, and social factors that contributed to the Union's victory over the Confederacy in the American Civil War. Edited by David Herbert Donald, a prominent historian of the nineteenth-century United States, the book compiles scholarly analyses that challenge traditional narratives. The contributors argue that victory was not inevitable and examine overlooked variables that shifted the balance of power between the two sides.

Historians and scholars frequently cite this work as a significant contribution to the historiography of the Civil War for its focus on structural causes rather than battlefield events. Readers often note that the prose is accessible to enthusiasts while maintaining the academic rigor expected of a professional historical collection.