Was it easier back then for something like the Italian Mafia to get powerful? Could some organized crime group ever get as massive as that again in the U.S., or even many small organized groups of crime?

I feel like especially after that era, we really have started to understand bribery of officials, intimidation, threats, and basically how it all works.

Does this mean the U.S. is so equipped with the info to fight back against organized crime that we will see another organized crime group rise? (Not rooting for crime, it is just a thought).