italian mafia in italy became a multi billion dollar powerhouse only in the1970s, because of the management of public works, gambling, international drug trafficking etc. there are several italian bosses who are millionaire, or even billionaire, matteo messina denaro is really billionaire, police seized assets worth 1,5 billion euros to him, and that's only the part seized
i think that american mafia in the 19401960 period was the strongest worldwide, it depends what you mean for information at that time there were by far less powerful criminal groups than today, italian mafia in italy, yakuza and triads were weaker than american mob i bet, yakuza was at its peak in 1980s (american mob in 1960s), italian mafia in italy was at its peak in 1980s too, i don't know Triads, but probably in the 1970s were at their peak mexican and colombian cartels were nothing at that time, russian mafia didn't exist, so i think italo-american mob was really the strongest at that time
The Yakuza engaged in the same activities during that time frame and reached a collective peak of 180K membership in the late 60s. Triads probably aren't to far behind in the same time frame. Russian OC still exist back then but i don't know much information on it. Drug cartels that was shipping the products to Italian American mob ( mainly French & Asian OC) definitely was reaping significant revenues.
We need more members that know indepth history of organized crime in China & Japan. Afterall , Triads & Yakuza are at least 100 years older than all the Italian syndicates.
If you think you are too small to make a difference, you haven't spend the night with a mosquito. - African Proverb