In "The March of Folly: From Troy to Vietnam," Barbara W. Tuchman explores the theme of political folly, emphasizing that the desire for power is a leading factor in irrational decision-making among leaders. This lust for power, described by Tacitus as the most blatant of passions, often drives individuals to pursue agendas that prioritize personal gain over the common good. Such motivations can lead to disastrous consequences in governance and international relations.

Tuchman's analysis highlights how this relentless pursuit of power can blind leaders to reality, making them ignore warnings and evidence that contradict their ambitions. By choosing personal ambition over wise counsel or the welfare of their constituents, these leaders may engage in strategies that ultimately undermine their authority and lead to failure. Through historical examples, Tuchman illustrates the recurring pattern of folly in politics driven by unchecked power and ambition.