No, but the Mafia does not run it, and are not the most powerful. New York is so large with such a huge population, no one group can "Take over." Plus OC groups rarely try to take over another groups rackets (Yes, I am sure there is the Rare exception) What can happen is an area changes so much one group disappears or shrinks, and another takes over that way. No one runs the entire city, or has power over the others. That is just fantasy talk. .