Yes, parts of EoC are a definite slog, but as is common with Quigley's work, there are fascinating insights to be had. I'll cite his analysis of the Pakistani-Peruvian axis an example - you pretty much have to slog through most of the 1300+ pages of Tragedy and Hope to get to it, but it's one of the book's gems.
I rarely pay 35 bucks for a book but T&H was unavailable even for that for yrs and after reading Evolution I had to read it. So I figured it was really three books because of its length and bought a new one.
He certainly had no hesitation in naming those involved in the Roundtable and the Council on Foreign Relations both of which gave him access to their files and papers. And they weren’t unified in their policies either. And the factions (if not total control) had and used access to the media to work out their aims.