Yea I would have to say the 50s were their peak bc of vegas, cuba not to mention all the politicaL influence and they actually controlled entire industries.

Id also add that the 60s were close 2nd along w the 40s..I think if u believe the mob had kennedy whacked which I do (not trying to sidetrack thread about jfk just an opinion)..but if they whacked jfk they were so powerful that they were able to actually do it and get away with it..pretty hard to argue when it was at its peak when if u believe it they had the most powerful man in the world executed