Joe Adonis
In the late 1920s, Johnny Torrio helped to organize a loose cartel of East Coast bootleggers, the Big Seven, in which a number of prominent gangsters, including Costello, Luciano, Longy Zwillman, Joe Adonis, and Meyer Lansky played a part. Torrio also supported creation of a national body that would prevent the sort of all-out turf wars between gangs that had broken out in Chicago and New York. His idea was well received, and a conference was hosted in Atlantic City by Torrio, Lansky, Luciano and Costello in May 1929; the National Crime Syndicate was created.