In her book "The March of Folly: From Troy to Vietnam," Barbara W. Tuchman examines the attributes that she believes define a particular group of historical figures. She characterizes them as being fearless and having strong principles. These individuals were not only knowledgeable about political theories from both ancient and modern times but also displayed a pragmatic approach to challenges they faced.

Moreover, Tuchman emphasizes their willingness to experiment and their belief in the potential for human improvement through intelligent action. This conviction about the power of human intellect to effect change is a key quality that sets them apart. Overall, the historian depicts a vivid image of leaders who were not just courageous and principled but also intellectually equipped to navigate complex political landscapes.