Mob

The Mob, also known as the Mafia or Cosa Nostra was a criminal organization active during the 19th and 20th centuries on Earth.

The mob was very active in early 20th century Chicago, to the point that conventional government in the city nearly collapsed. In the 1990's, the book Chicago Mobs of the Twenties detailed the history of the mob during this period. Centuries later, a copy of that book was left on Sigma Iotia II by the crew of the USS Horizon. The Iotians saw the mob as a perfect society, and changed their society to one based on that of the mob. When the crew of the USS Enterprise (NCC-1701) visited the planet in the 23rd century, they helped guide the Iotians into a more ethical system. (TOS: "A Piece of the Action")