The thing that will kill the mob is assimilation. Without the Italian neighborhoods, there is no recruiting pool. That's why only the NY/NJ area is still going strong. Philly and New England may outlast Chicago because of that.
And unlike during the mob's heyday, today there are way too many criminal competitors doing business for the mob to rule the criminal underworld. The days of the LCN being the 'top dog' in the underworld I think are over (and have been over for some time).
