the Ndrangheta thanks to immigrants from Calabria, spread all over the world especially in Canada and Australia.Robert Trimbole (1931-1987) was a infamous drug baron that during the Vitnam War when many american soldier go to Austraulia where large spaces couldn't be controlled entirely by the police, sell large amounts of marijuana before moving to heroin.
Trimbole is a central character in the drama series Underbelly: A Tale of Two Cities.

as regards Italy, in Fratelli di Sangue (Blood Brothers) of Nicola Grattieri is explained as the Ndrangheta became until 1990,kidnapping industry, famous was that of John Paul Getty III in 1973, with the ransom money financed drug trafficking , before moving in 1990 to completely drug trafficking (famous is the legend, which is perhaps true that with the money were built entire neighborhoods in small towns in Calabria, which people call as the name of the kidnapped).

What made the Ndrangheta, so powerful was the fact of being considered both the Italian state by both other organizations, a bands of violent shepherds,fierce but disorganized.
So after that in 1992, Cosa Nostra had declared war on the state is ended almost to disappear, their place in the international drug market was taken from the Ndrangheta (famous is the case where a mobster was about to be killed by the Clobian because can't pay a drug load and a ndrina men onlyon his word that he will pay at the place of theman, let the Colombian to free the man).

Also in ndrine who is the son of members, in turn, becomes a member, he has no choice if he wanted to flip,he would be disowned by his family, and would betray the whole family, and this is an extraordinary incentive.

The pentiti in the Ndrangheta, can be count on your fingers.