Pretty interesting, my compliments, Turbull. It was also a very good question, one I had been meaning to ask!
So technically, if you look at it like that, no one is really mafia except the old Sicilian mafia, which went under that name. It seems as though they're all just "Italian criminals" these days.
Was there only one family in each city (with exception of New York)? No more, no small time mafia? Did they allow competition then?
Sorry guys I'm plaguing this beautiful post with my swarm-like questions!