Paul Preston investigates the complex legacy of Francisco Franco to determine whether his long-standing dictatorship served as a period of national stagnation or a catalyst for Spain's modernization. Drawing upon extensive archival research and historical analysis, Preston evaluates Franco's military leadership, his strategic maneuvering during the Spanish Civil War and World War II, and the long-term economic consequences of his regime. The author provides a rigorous examination of the dictator's decision-making processes and the moral accountability for the atrocities committed under his rule.

This biography is widely regarded as a definitive and exhaustive account of Franco's life, noted for its meticulous research and objective scrutiny of controversial historical claims. The text serves as a primary reference for scholars and students seeking to understand the structural impact of the Francoist regime on contemporary Spain.