Question: Which charismatic Jewish American mobster created the Cohen crime family in the early 1930s? 
Context: Meyer Harris "Mickey" Cohen (September 4, 1913 – July 29, 1976) was an American gangster based in Los Angeles and boss of the Cohen crime family.  He also had strong ties to the Italian American Mafia from the 1930s through 1960s. The Cohen crime family, or the Siegel-Cohen crime syndicate, was a Jewish-Italian crime family that was active from 1933 to 1961.  The family was founded by New York Jewish mobster Benjamin "Bugsy" Siegel in the early 1930s.  He had Los Angeles Mafia boss Jack Dragna and Jewish mobsters Mickey Cohen and Moe Sedway as his lieutenants.  He created the biggest prostitution ring, gambling and protection rackets in Las Vegas and Los Angeles.  He also expanded into drug trafficking and bookmaking. Hana Wirth-Nesher (born 2 March 1948) is an Israeli literary scholar and university professor.  She is Professor of English and American Studies at Tel Aviv University, where she is also the Samuel L. and Perry Haber Chair on the Study of the Jewish Experience in the United States, and director of the Goldreich Family Institute for Yiddish Language, Literature, and Culture.  Specializing in the role of language, especially Yiddish, in expressing personal identity in Jewish American literature, she has written two books and many essays on American, English, and Jewish American writers.  She is the editor of "The Cambridge History of Jewish American Literature" (2015) and the co-editor (with Michael P. Kramer) of "The Cambridge Companion to Jewish American Literature" (2003).  She is the co-creator and academic co-director of the annual Yiddish summer program at Tel Aviv University. Aladena "Jimmy the Weasel" Fratianno (November 14, 1913 – June 30, 1993) was an Italian-born American mobster originally from Cleveland, Ohio, and later acting head of the Los Angeles crime family before becoming a US government witness.  Fratianno was the most powerful mobster to become a federal witness until Sammy "the Bull" Gravano agreed to testify against the Gambino crime family in 1991. Steven Mazzone (born 1964) is an American mobster believed to be a high ranking member of the Philadelphia crime family.  Mazzone's rise in power through the Philadelphia underworld began as a protege of former boss turned informant, Ralph Natale.  After the family was decimated by prosecutions during the Nicodemo Scarfo and John Stanfa eras, Natale was released from prison in 1994 and shortly thereafter became the new boss of the crime family.  Natale partnered with the "Young Turks" faction that was one of the few remnants left of the Philadelphia crime family, and their leader, Joseph "Skinny Joey" Merlino.  After Natale assumed the top position as boss, he positioned Merlino as underboss and Ronald Turchi as the consigliere in the new hierarchy.  This administration is still in question to this day, as many now believe that Merlino was running the family behind the scenes, letting Natale have the boss position to deter law enforcement from himself. John "Johnny" Stompanato Jr. (October 10, 1925 – April 4, 1958), was a former United States Marine who became a bodyguard and enforcer for gangster Mickey Cohen and the Cohen crime family. Joseph Salvatore "Skinny Joey" Merlino (born March 16, 1962) is an American mobster believed to be the boss of the Philadelphia crime family despite the appearance of having various legitimate business fronts as well as accounts from acting bosses; led it primarily in loan sharking, gambling and extortion.  During the 1990s, Merlino began a mob war within the crime family and survived numerous assassination attempts.  By 1995 he was the effective leader of the Philadelphia crime family.  Unlike most mobsters who shunned the limelight, Merlino always enjoyed the publicity from the media and the public.  He is the son of deceased Scarfo crime family Underboss Chuckie Merlino. Girolomo "Momo" Adamo (1895–1956) was an Italian American mobster in the American Mafia.  He lived in Chicago and Kansas City before moving to Los Angeles in the 1930s and soon became underboss to Jack Dragna in the Los Angeles crime family.  His brother Joseph Adamo was also a member of the crime family.  Both he and his brother were well connected criminals in San Diego, working with such mobsters as Frank Bompensiero.  In 1950, Momo was arrested along with several members of Jack Dragna's family including Tom Dragna (brother), Louis Dragna (nephew), and two men named Frank Paul Dragna (his son and nephew, respectively) after Jack fled the state after being named in the California Crime Commission report as a member of a crime syndicate in Los Angeles.  The five of them were taken into custody by the Los Angeles Police Department, who believed they were responsible for bombing Mickey Cohen's home or knew who was.  They were all released without being charged when the police couldn't find evidence of their involvement (Tom built the bomb, but otherwise none of them were involved). The Cohen crime family, or the Siegel crime syndicate, was an Italian-American Mafia / Jewish Mafia crime family created by New York Jewish American mobster Benjamin "Bugsy" Siegel in the early 1930s.  Siegel ran Los Angeles and later Las Vegas' illegal gambling and prostitution rings with his lieutenants Mickey Cohen, David Berman, Harold "Hooky" Rothman, Moe Sedway and boss of the L.A. family Jack Dragna. Benjamin "Bugsy" Siegel (February 28, 1906 – June 20, 1947) was a Jewish American mobster.  Siegel was known as one of the most "infamous and feared gangsters of his day".  Described as handsome and charismatic, he became one of the first front-page celebrity gangsters.  He was also a driving force behind the development of the Las Vegas Strip.  Siegel was not only influential within the Jewish mob but, like his friend and fellow gangster Meyer Lansky, he also held significant influence within the Italian-American Mafia and the largely Italian-Jewish National Crime Syndicate.
Answer: Benjamin "Bugsy" Siegel