I hear you, rich hang with rich, sounds plausible.
I can’t explain J P Morgan founding the Council on Foreign Relations, though. That does not square as normal behavior for rich people.
Why wouldn’t a many involved in international business want to be in a group of high powered businessmen and politicians from multiple countries? The more information he has the more business opportunities he can capitalize on. The more people he knows in foreign countries the more business allies he has. It’s rich hanging with rich.