A cabal runs the world. Every market becomes a monopoly or a cartel in the absence of regulatory forces. There’s no world police, therefore the Rothschilds, Carnegies, Mellons, etc. would have coordinated to divvy up territory and install puppet rulers. They’re not going to waste resources competing when they can cooperate. They stay out of the public eye so they don’t get targeted and don’t have to suffer the burdens of being famous.