gangsterism

noun

1. (countable, uncountable)The behavior of a gangster; organized crime.

   “In a city known once as a centre of gangsterism and of beggars and prostitutes, it is claimed that now not a single night club exists. About 10,000 prostitutes were put into reformatories for labour reform and rehabilitation to Communist society.”

   “Charges to be laid include gangsterism, drug trafficking, weapons possession and conspiracy to commit murder.”