In "The March of Folly," Barbara W. Tuchman explores the recurring theme of folly throughout history, particularly how humans repeatedly make decisions that seem irrational. She emphasizes that a prevailing attitude of superiority often clouds judgment, leading individuals or societies to dismiss wiser alternatives. This mindset creates a barrier that prevents them from recognizing their own errors.

Tuchman argues that such impenetrable attitudes can result in disastrous outcomes, as history shows instances where leaders and nations have ignored critical advice or evidence. This tendency towards folly, driven by arrogance, serves as a warning about the consequences of prioritizing pride over sound judgment.