That's pretty much what I caught on about the Mafia. The Cosa Nostra, namely in America, is male-only. Yet, the restrictions used to be much more stringent. You needed to be from Sicily or else. Then Lucky Luciano stepped in and say, look we're fighting eachother over which part of sicily we're from. This kind of crap is blackening our name and what we stand for. Thanks to him, many more gangsters were approved, as the requirements where from then on, Italian Descent, and now simply to have had an Italian father.
Lucianno is as important to organized crime was Meyer Lanksy or Capone, because without him, The Commission (ruling board of the mafia) would not exist. He help build the foundations that kept the mob going until Valachi and beyond.