Thomas Gaetano Lucchese, sometimes known by the nicknames "Tommy", "Thomas Luckese", "Tommy Brown" or "Tommy Three-Finger Brown", was an Italian-American gangster and founding member of the Mafia in the United States, an offshoot of the Cosa Nostra in Sicily. From 1951 until 1967, he was the boss of the Lucchese crime family, one of the Five Families that dominate organized crime in New York City.

The Commission is the governing body of the American Mafia, formed in 1931 by Charles "Lucky" Luciano following the Castellammarese War. The Commission replaced the title of capo di tutti i capi, held by Salvatore Maranzano before his murder, with a ruling committee that consists of the bosses of the Five Families of New York City, as well as the bosses of the Chicago Outfit and, at various times, the leaders of smaller families, such as Buffalo, Philadelphia, Detroit, and others. The purpose of the Commission was to oversee all Mafia activities in the United States and serve to mediate conflicts among families.