" To qualify as folly for this inquiry, the policy adopted must meet three criteria: it must have been perceived as counter-productive in its own time, not merely by hindsight. This is important, because all policy is determined by the mores of its age. “Nothing is more unfair,” as an English historian has well said, “than to judge men of the past by the ideas of the present "

― Barbara W. Tuchman , The March of Folly: From Troy to Vietnam