Wow... best essay I’ve read here in a long time.
Quigley was a brilliant historian. His application of scientific method and anthropological science to history remains unparalleled today. Most historians relate facts and events. Quigley looked for the underlying patterns, the drivers of human behavior and culture.
This, of course was quite at odds with modern prevailing historical wisdom, most of which is infected with the Marxist outlook - the denial of culture or individual conscience in the role of human affairs.