known as the "Mob's Accountant", was an American[3] major organized crime figure who, along with his associate Charles "Lucky" Luciano, was instrumental in the development of the National Crime Syndicate in the United States.

Associated with the Jewish mob, Lansky developed a gambling empire that stretched across the world. He was said to own points (percentages) in casinos in Las Vegas, Cuba, The Bahamas and London. Although a member of the Jewish mob, Lansky undoubtedly had strong influence with the Italian-American Mafia and played a large role in the consolidation of the criminal underworld. The full extent of this role has been the subject of some debate, as Lansky himself denied many of the accusations against him.