In "The March of Folly: From Troy to Vietnam," Barbara W. Tuchman explores the intricate relationship between individual effort and the historical context in which that effort occurs. The quote by Pope Clement VII raises an important question regarding the extent to which a man's contributions are influenced by the era he lives in. Tuchman delves into various historical events, illustrating how the circumstances and characteristics of different periods shape the actions and effectiveness of individuals.

This examination highlights that while personal ambition and talent are essential, they may be significantly constrained or enhanced by the societal, political, and cultural landscape surrounding a person. Historical figures are often judged not only by their actions but also by the challenges and opportunities presented to them by their times, underlining the complex interplay between individual agency and historical context.