Question: Which American journalist, poet, and socialist activist contributed to the short-lived weekly newspaper issued by the Left Wing Section of the Socialist Party of Local Greater New York?

Context paragraphs:
The Revolutionary Age: The Revolutionary Age was an American radical newspaper edited by Louis C. Fraina and published from November 1918 until August 1919.  Originally the publication of Local Boston, Socialist Party, the paper evolved into the "de facto" national organ of the Left Wing Section of the Socialist Party which battled for control of the Socialist Party throughout the spring and summer of 1919.  With the establishment of the Left Wing National Council in June 1919, the paper was moved from Boston to New York City gained status as the official voice of the nascent American communist movement.  The publication was terminated in August 1919, replaced by the official organ of the new Communist Party of America, a weekly newspaper known as "The Communist."

Left Wing Section of the Socialist Party: The Left Wing Section of the Socialist Party was an organized faction within the Socialist Party of America in 1919 which served as the core of the dual communist parties which emerged in the fall of that year — the Communist Party of America and the Communist Labor Party of America.

John Reed (journalist): John Silas "Jack" Reed (October 22, 1887 – October 17, 1920) was an American journalist, poet, and socialist activist, best remembered for his first-hand account of the Bolshevik Revolution, "Ten Days That Shook the World".  He was married to writer and feminist Louise Bryant.  Reed died in Russia in 1920 and is one of only three Americans buried in the Kremlin Wall Necropolis, the others being labor organizer Bill Haywood, and Charles Ruthenburg (the founder of the Communist Party USA).

New York Communist: The New York Communist was a short-lived weekly newspaper issued by the Left Wing Section of the Socialist Party of Local Greater New York, encompassing the New York City metro area.  The paper was edited by the renowned radical journalist and war correspondent John Reed.  Only 10 issues of the paper were produced during 1919 before the publication was absorbed by "The Revolutionary Age" following the Left Wing National Conference of June 1919.

Socialist Propaganda League of America: The Socialist Propaganda League of America was established in 1915, apparently by C.W. Fitzgerald of Beverly, Massachusetts.  The group was a membership organization established within the ranks of the Socialist Party of America and is best remembered as direct lineal antecedent of the Left Wing Section of the Socialist Party and its governing National Council — the forerunner of the American Communist movement.

Socialist Appeal (US, 1935): Socialist Appeal was the name of a newspaper published by American Trotskyists from 1935 to 1941.  It was started by supporters of the Trotskyist Workers Party of the United States in Chicago who had entered the Socialist Party of America in 1935 and was edited by Albert Goldman.  In 1936, when the Workers Party formerly dissolved and entered en masse into the SPA and in August 1937 the publication moved to New York City and was re-launched as the organ of the "Left Wing Branches of the Socialist Party" but was effectively controlled by the unofficial Trotskyist faction within the SPA.  The "Socialist Appeal tendency" split from the Socialist Party to form the Socialist Workers Party in 1938.  The publication became the official organ of the SWP and continued as "Socialist Appeal" until 1941 when it was renamed "The Militant", reverting to the name of the original (1928-1934) Communist League of America publication.

Adolph Germer: Adoph F. Germer (1881–1966) was an American socialist political functionary and union organizer.  He is best remembered as National Executive Secretary of the Socialist Party of America from 1916 to 1919.  It was during this period that the Left Wing Section of the Socialist Party emerged as an organized faction.  Germer was instrumental as one of the leaders of the SPA's "Regular" faction in orchestrating a series of suspensions, expulsions, and "reorganizations" of various Left Wing states, branches, and locals and thereby controlling the pivotal 1919 Emergency National Convention of the SPA, and thus forcing the Left Wing to establish new organizations of their own, the Communist Labor Party of America and the Communist Party of America.

Maximilian Cohen: Maximilian "Max" Cohen was an American socialist politician of the early 20th Century.  Cohen held a series of important posts during the pivotal year of 1919, including Secretary of the Left Wing Section of the Socialist Party for Local Greater New York, Secretary of the Left Wing National Council, and business manager for the "New York Communist."  Cohen was also a founding member of the Communist Party of America in that same year.

Hermon F. Titus: Hermon Franklin Titus (1852–1931) was an American socialist activist and newspaper publisher.  Originally a Baptist minister before becoming a medical doctor, Titus is best remembered as a factional leader of the Washington state affiliate of the Socialist Party of America (SPA) during the first decade of the 20th century and as editor of "The Socialist," one of the most-widely circulated radical newspapers of that period.  Titus led a party split from the Socialist Party of Washington in 1909 and helped found a short-lived organization called the Wage Workers Party.  His paper failed with that organization and he died in self-chosen obscurity in New York City, a medical doctor working in a low paying service job.

Left Wing Manifesto: The Left Wing Manifesto is the name rather confusingly bestowed upon two distinct programmatic documents of the Left Wing Section of the Socialist Party during the factional war in the Socialist Party of America of 1919.

Supporting paragraphs: New York Communist John Reed (journalist)
Answer: John Reed