The Sicilian Mafia or Cosa Nostra (Italian: [ˈkɔːza ˈnɔstra, ˈkɔːsa -]; Sicilian: [ˈkɔːsa ˈnɔʂː(ɽ)a]; lit. 'Our Thing'), also simply referred to as Mafia, is a criminal society and criminal organization originating on the island of Sicily and dates back to the mid-19th century. Emerging as a form of local protection and control over land and agriculture, the Mafia gradually evolved into a powerful criminal network. By the mid-20th century, it had infiltrated politics, construction, and finance, later expanding into drug trafficking, money laundering, and other crimes.
https://en.wikipedia.org/wiki/Sicilian_Mafia