The island is large but underpopulated with not even 2 million inhabitants, and inland people were engaged in sheep farming while those who live along the coast work with tourism.
Too poverty for create a native organizated oc gruop.
and calabria?? it was underpopulated and even poorer... i bet the main reason is that sardinia was not part of the kingdom of the two sicilies, the mafia groups were born thanks to favorable historical environment and links with politicians and masonry since the beginning
