Question: What Jewish American Mobster was the predecessor of Murder, Inc.? 

Context articles: List of Jewish American composers
Jewish literature
Cohen crime family
Hana Wirth-Nesher
Danny Greene
The Bugs and Meyer Mob
Jewish American literature
Morris Kessler
Bugsy Siegel
Haunted in the New World

"This is a list of Jewish American composers.
 For listings of Jewish American songwriters, musicals writers, and film composers, see List of Jewish American musicians, which shares some names with this list.
 For other famous Jewish Americans, see List of Jewish Americans."
Jewish literature includes works written by Jews on Jewish themes, literary works written in Jewish languages on various themes, and literary works in any language written by Jewish writers.
 Ancient Jewish literature includes Biblical literature and rabbinic literature.
 Medieval Jewish literature includes not only rabbinic literature but also ethical literature, philosophical literature, mystical literature, various other forms of prose including history and fiction, and various forms of poetry of both religious and secular varieties.
 The production of Jewish literature has flowered with the modern emergence of secular Jewish culture.
 Modern Jewish literature has included Yiddish literature, Ladino literature, Hebrew literature (especially Israeli literature), and Jewish American literature.
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.
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.
Daniel John Patrick "Danny" Greene (November 14, 1933 – October 6, 1977) was an Irish American mobster and associate of Cleveland mobster John Nardi during the gang war for the city's criminal operations during the 1970s.
 Competing gangsters set off more than 35 bombs, most attached to cars in murder attempts, many successful.
 Greene had gained power first in a local chapter of the International Longshoremen's Association, where he was elected president in the early 1960s.
 Greene pushed into Cleveland rackets and began competing with the Italian-American Mafia for control of the city.
 He set up his own group called the Celtic Club, complete with enforcers.
The Bugs (Bugsy) and Meyer Mob was a Jewish-American street gang in Manhattan, New York City's Lower East Side.
 It was formed and headed by mobsters Bugsy Siegel and Meyer Lansky during their teenage years shortly after the start of Prohibition.
 The Bugs and Meyer mob acted as a predecessor to Murder, Inc.
Jewish American literature holds an essential place in the literary history of the United States.
 It encompasses traditions of writing in English, primarily, as well as in other languages, the most important of which has been Yiddish.
 While critics and authors generally acknowledge the notion of a distinctive corpus and practice of writing about Jewishness in America, many writers resist being pigeonholed as "Jewish voices."
 Also, many nominally Jewish writers cannot be considered representative of Jewish American literature, one example being Isaac Asimov.
Morris L. Kessler (January 6, 1912 – September 30, 1935) was an American mobster and member of Joseph Amberg's gang in Brooklyn during the early 1930s.
 As Amberg's personal chauffeur and bodyguard, Kessler was a close associate in his organization until he was killed alongside his boss at a Brownsville auto garage by members of Murder, Inc. in 1935.
 The gangland slayings of Kessler and Amberg were among the first major contract killings committed by Murder, Inc. and was one of the most publicized of the era.
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.
Haunted in the New World: Jewish American Culture from Cahan to The Goldbergs is a 2005 book by Donald Weber written as an overview of 20th century Jewish American literature and popular culture.
 Abraham Cahan was one of the most recognizable Jewish-American writers in both Yiddish and English.
 "The Goldbergs" began in 1929 as a radio comedy and drama about a Jewish-American family, and the show was initially targeted for Yiddish radio stations, but they made the leap first to CBS radio in 1936, and then to mass-market television in 1949, becoming a long-running situation comedy.