Really interesting read. I see it applying to world leaders, but also sports teams, movie directors/actors. Think of the foreign policy teams under GHWB in the early 90's. Clearly WWII and Independence. Noonan is right, no geniuses in sight.
Might have been fascinating, but I can only see a paragraph and a half. Anyway, sounds like your standard Great Man approach to historiography.
There may be some evidence for this hypothesis, but eh, fossilized professional opinion haver Peggy Noonan? No thanks.