List of members of the Socialist Party of America
Encyclopedia
This is a selectively annotated list of the most prominent or important members of the Socialist Party of America
Socialist Party of America
The Socialist Party of America was a multi-tendency democratic-socialist political party in the United States, formed in 1901 by a merger between the three-year-old Social Democratic Party of America and disaffected elements of the Socialist Labor Party which had split from the main organization...

(1901–1972).

Summary list

Key:
* Went on to join the Communist Party
Communist Party USA
The Communist Party USA is a Marxist political party in the United States, established in 1919. It has a long, complex history that is closely related to the histories of similar communist parties worldwide and the U.S. labor movement....

, Communist Labor Party
Communist Labor Party
The Communist Labor Party of America was one of the organizational predecessors of the Communist Party USA. The group was established at the end of August 1919 following a three-way split of the Socialist Party of America...

 or Workers Party of America
Workers Party of America
The Workers Party of America was the name of the legal party organization used by the Communist Party USA from the last days of 1921 until the middle of 1929. As a legal political party the Workers Party accepted affiliation from independent socialist groups such as the African Blood Brotherhood,...

ISS A founder or key member of the Intercollegiate Socialist Society
Intercollegiate Socialist Society
The Intercollegiate Socialist Society was the a Socialist student organization from 1905-1921. It attracted many prominent intellectuals and writers and acted as the unofficial Socialist Party of America student wing...

, 1905, later League for Industrial Democracy
League for Industrial Democracy
The League for Industrial Democracy , from 1960-1965 known as the Students for a Democratic Society , was founded in 1905 by a group of notable socialists including Harry W. Laidler, Jack London, Norman Thomas, Upton Sinclair, and J.G. Phelps Stokes...

IWW A founder of the Industrial Workers of the World
Industrial Workers of the World
The Industrial Workers of the World is an international union. At its peak in 1923, the organization claimed some 100,000 members in good standing, and could marshal the support of perhaps 300,000 workers. Its membership declined dramatically after a 1924 split brought on by internal conflict...

, 1905.
SDL Left to found the Social Democratic League of America, 1917.
SDF Left to found the Social Democratic Federation, 1936.
SDUSA Continued into Social Democrats USA
Social Democrats USA
Social Democrats, USA was the principal association of U.S. social democrats from 1972–2005.SDUSA was founded in 1972 when the Socialist Party of America renamed itself Social Democrats, USA...

, 1973
SPUSA Went on to join the Socialist Party USA
Socialist Party USA
The Socialist Party USA is a multi-tendency democratic-socialist party in the United States. The party states that it is the rightful continuation and successor to the tradition of the Socialist Party of America, which had lasted from 1901 to 1972.The party is officially committed to left-wing...

, 1973
DSOC Went on to join the Democratic Socialist Organizing Committee
Democratic Socialist Organizing Committee
The Democratic Socialist Organizing Committee was founded in 1973 by Michael Harrington, who led a minority caucus in the Socialist Party. Harrington's caucus supported George McGovern's his call for a cease-fire and immediate withdrawal of U.S. forces from Vietnam...

, 1973, later Democratic Socialists of America
Democratic Socialists of America
Democratic Socialists of America is a social-democratic organization in the United States and the U.S. affiliate of the Socialist International, an international federation of social-democratic,democratic socialist and labor political parties and organizations.DSA was formed in 1982 by a merger of...


  • Martin Abern
    Martin Abern
    Martin Abern was a Marxist politician who was an important leader of the Communist youth movement of the 1920s as well as a founder of the American Trotskyist movement.-Early years:...

     *
  • Devere Allen
  • Elmer Allison
    Elmer Allison
    Elmer T. Allison was an American socialist political activist and newspaper editor. He is best remembered as the longtime editor of The Cleveland Socialist and The Toiler, forerunners of the official organ of the Communist Party, USA, The Daily Worker.-Early years:Elmer T...

     *
  • E.B. "Harry" Ault
    E.B. "Harry" Ault
    Erwin Bratton "Harry" Ault was an American socialist and trade union activist. He is best remembered as the editor of the Seattle Union Record, the long-running labor weekly published from 1912 to 1928. After termination of the Union Record, Ault worked as a commercial printer for a number of...

  • J. Mahlon Barnes
    J. Mahlon Barnes
    John Mahlon Barnes was an American trade union functionary and socialist political activist. Barnes is best remembered as the Executive Secretary of the Socialist Party of America from 1905 to 1911, during which time he originated the idea of the party's 1908 "Red Special" campaign train on behalf...

  • David P. Berenberg
    David P. Berenberg
    David Paul Berenberg was an American socialist teacher, editor, and writer. He is best remembered as a founder and editor of The American Socialist Quarterly, the theoretical magazine of the Socialist Party of America during the 1930s....

  • Victor L. Berger
    Victor L. Berger
    Victor Luitpold Berger was a founding member of the Socialist Party of America and an important and influential Socialist journalist who helped establish the so-called Sewer Socialist movement. The first Socialist elected to the U.S...

  • Barney Berlyn
  • Allan L. Benson
    Allan L. Benson
    Allan Louis Benson was an American newspaper editor and author who ran for President as the Socialist Party of America candidate in 1916.-Early years:Benson was born in Plainfield, Michigan on November 6, 1871. His father, Adelbert L...

  • Ella Reeve Bloor
    Ella Reeve Bloor
    Ella Reeve "Mother" Bloor was an American labor organizer and long-time activist in the socialist and communist movements.-Early years:...

     *
  • Nikolai Bukharin
    Nikolai Bukharin
    Nikolai Ivanovich Bukharin , was a Russian Marxist, Bolshevik revolutionary, and Soviet politician. He was a member of the Politburo and Central Committee , chairman of the Communist International , and the editor in chief of Pravda , the journal Bolshevik , Izvestia , and the Great Soviet...

  • Roy E. Burt
    Roy E. Burt
    Roy Everett Burt was a Methodist clergyman and an American socialist politician and functionary. Burt is best remembered as the Executive Secretary of the Socialist Party of America from 1936 to 1939.-Early years:...

  • Frank Bohn
    Frank Bohn (socialist)
    Frank Bohn was an advocate of industrial unionism who was a founding member of the Industrial Workers of the World. From 1906 to 1908 he was the National Secretary of the Socialist Labor Party of America, before leaving to join forces with the rival Socialist Party of America...

     IWW
  • Earl Browder
    Earl Browder
    Earl Russell Browder was an American communist and General Secretary of the Communist Party USA from 1934 to 1945. He was expelled from the party in 1946.- Early years :...

    *
  • Jack Carney *
  • James P. Cannon
    James P. Cannon
    James Patrick "Jim" Cannon was an American Trotskyist and a leader of the Socialist Workers Party.Born on February 11, 1890 in Rosedale, Kansas, he joined the Socialist Party of America in 1908 and the Industrial Workers of the World in 1911...

     *
  • Travers Clement
    Travers Clement
    Travers Clement was an American socialist writer, politician, and political functionary. He is best remembered as an assistant to Angelica Balabanoff in the writing of her memoirs and for his tenure as the National Executive Secretary of the Socialist Party of America beginning in April 1939.-Early...

  • Joseph Coldwell
  • James Connolly
    James Connolly
    James Connolly was an Irish republican and socialist leader. He was born in the Cowgate area of Edinburgh, Scotland, to Irish immigrant parents and spoke with a Scottish accent throughout his life. He left school for working life at the age of 11, but became one of the leading Marxist theorists of...

  • Eugene V. Debs
    Eugene V. Debs
    Eugene Victor Debs was an American union leader, one of the founding members of the International Labor Union and the Industrial Workers of the World , and several times the candidate of the Socialist Party of America for President of the United States...

     IWW
  • Nicholas Dozenberg
    Nicholas Dozenberg
    Nicholas "Nick" Dozenberg was an American political functionary with the Communist Party USA in the 1920s. Late in 1927 Dozenberg was recruited into the underground Soviet military intelligence network, for which he worked for more than a decade under the pseudonym "Nicholas Ludwig Dallant."...

     *
  • David Dubinsky
    David Dubinsky
    David Dubinsky was an American labor leader...

  • Max Eastman
    Max Eastman
    Max Forrester Eastman was an American writer on literature, philosophy and society, a poet, and a prominent political activist. For many years, Eastman was a supporter of socialism, a leading patron of the Harlem Renaissance and an activist for a number of liberal and radical causes...

     *
  • J. Louis Engdahl
    J. Louis Engdahl
    John Louis Engdahl was an American socialist journalist and newspaper editor. One of the leading journalists of the Socialist Party of America, Engdahl joined the Communist movement in 1921 and continued to employ his talents in that organization as the first editor of The Daily Worker...

  • Elizabeth Gurley Flynn
    Elizabeth Gurley Flynn
    Elizabeth Gurley Flynn was a labor leader, activist, and feminist who played a leading role in the Industrial Workers of the World . Flynn was a founding member of the American Civil Liberties Union and a visible proponent of women's rights, birth control, and women's suffrage...

     *
  • William Z. Foster
    William Z. Foster
    William Foster was a radical American labor organizer and Marxist politician, whose career included a lengthy stint as General Secretary of the Communist Party USA...

     *
  • Louis Fraina *
  • Joseph Freeman
    Joseph Freeman (writer)
    Joseph "Joe" Freeman was an American writer and magazine editor. He is best remembered as a contributor and editor to The New Masses, a literary and artistic magazine closely associated with the Communist Party USA, and as a founding editor of the magazine Partisan Review.-Early years:Joseph...

     *


  • Samuel Friedman
    Samuel H. Friedman
    Samuel H. Friedman was a journalist and a longtime labor union activist. He twice ran unsuccessfully for Vice President of the United States on the Socialist Party of America ticket. In the 1952, the Socialist National Party Congress nominated Friedman to run along side its presidential candidate,...

     SPUSA
  • Julius Gerber
    Julius Gerber
    Julius Gerber was a leading Socialist Party of America party official and politician during the first two decades of the 20th century. Gerber headed the important Socialist Party unit for New York City and its environs from 1911 through 1922...

  • Adolph Germer
    Adolph Germer
    Adoph Germer 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...

  • Arturo Giovannitti
    Arturo Giovannitti
    Arturo M. Giovannitti was an Italian-American union leader, socialist political activist, and poet. He is best remembered as one of the principal organizers of the 1912 Lawrence Textile Strike and as a defendant in a celebrated trial ensuing from that event.-Early years:Arturo Giovannitti was born...

  • Benjamin Gitlow
    Benjamin Gitlow
    Benjamin "Ben" Gitlow was a prominent American socialist politician of the early twentieth century and a founding member of the Communist Party USA. From the end of the 1930s, Gitlow turned to conservatism and wrote two sensational exposés of American Communism, books which were very influential...

     *
  • Carl Haessler
    Carl Haessler
    Carl Haessler was an American political activist, conscription resister, newspaper editor, and trade union organizer. He is best remembered as an imprisoned conscientious objector during World War I and as the longtime head of the Federated Press, a left wing news service which supplied content to...

     *
  • Emanuel Haldeman-Julius SDL
  • Job Harriman
    Job Harriman
    Job Harriman was an ordained minister who later became an agnostic and a socialist. In 1900 he ran for Vice President of the United States along with Eugene Debs on the ticket of the Socialist Party of America. He later twice ran for mayor of Los Angeles, drawing considerable attention and support...

  • Michael Harrington
    Michael Harrington
    Edward Michael "Mike" Harrington was an American democratic socialist, writer, political activist, professor of political science, radio commentator and founder of the Democratic Socialists of America.-Personal life:...

     DSOC
  • Hubert Harrison
    Hubert Harrison
    Hubert Henry Harrison was a West Indian-American writer, orator, educator, critic, and radical socialist political activist based in Harlem, New York. He was described by activist A. Philip Randolph as “the father of Harlem radicalism” and by the historian Joel Augustus Rogers as “the foremost...

  • Max S. Hayes
    Max S. Hayes
    Maximillian Sebastian "Max" Hayes was a newspaper editor, trade union activist, and socialist politician. He is best remembered as the long-time editor of the Cleveland Citizen and as the Vice Presidential candidate of the Farmer-Labor Party ticket in 1920.-Early years:Max Hayes was born in...

  • Bill Haywood
    Bill Haywood
    William Dudley Haywood , better known as "Big Bill" Haywood, was a founding member and leader of the Industrial Workers of the World , and a member of the Executive Committee of the Socialist Party of America...

     IWW
  • Emil Herman
    Emil Herman
    Emil M. Herman was a German-American socialist and anti-war activist. A three-time candidate for Congress on the ticket of the Socialist Party of America, Herman is best remembered for his imprisonment by the Wilson administration due to his political activity in the outspokenly anti-war Socialist...

  • George D. Herron
    George D. Herron
    George D. Herron was an American clergyman, lecturer, writer, and Christian socialist activist. Herron is best remembered as a leading exponent of the so-called "Social Gospel" movement and for his highly publicized divorce and remarriage to the daughter of a wealthy benefactor which scandalized...

  • Morris Hillquit
    Morris Hillquit
    Morris Hillquit was a founder and leader of the Socialist Party of America and prominent labor lawyer in New York City's Lower East Side during the early 20th century.-Early years:...

     ISS
  • Daniel Hoan
    Daniel Hoan
    Daniel Webster "Dan" Hoan was a United States lawyer and politician. He became the second Socialist mayor of Milwaukee, Wisconsin, and his tenure is generally considered to be the longest continuous socialist administration in U.S. history...

  • Darlington Hoopes
    Darlington Hoopes
    Darlington Hoopes was the candidate of the Socialist Party of America for President of the United States in the 1952 and 1956 presidential elections.-Early years:...

     SPUSA
  • Jessie Wallace Hughan
    Jessie Wallace Hughan
    Jessie Wallace Hughan was an American educator, a socialist activist, and a radical pacifist. During her college days she was one of four co-founders of Alpha Omicron Pi, a national sorority for university women. She also was a founder and the first Secretary of the War Resisters League,...

     ISS
  • Haim Kantorovitch
    Haim Kantorovitch
    Haim Kantorovitch was an American socialist teacher, writer, and Marxist theoretician. Kantorovitch is best remembered as one of the intellectual leaders of the Militant faction of the Socialist Party of America in the early 1930s and as a founder and editor of The American Socialist Quarterly,...

  • David Karsner
    David Karsner
    David Fulton "Dave" Karsner was an American journalist, writer, and socialist political activist. Karsner is best remembered as a key member of the editorial staff of the New York Call and as an early biographer of Socialist Party of America leader Eugene V. Debs.-Early years:David Karsner was...

  • Helen Keller
    Helen Keller
    Helen Adams Keller was an American author, political activist, and lecturer. She was the first deafblind person to earn a Bachelor of Arts degree....

  • Charles H. Kerr
  • George R. Kirkpatrick
    George Ross Kirkpatrick
    George Ross "Kirk" Kirkpatrick was an American anti-militarist writer and political activist. He is best remembered as the 1916 Vice Presidential nominee of the Socialist Party of America...

  • Alexandra Kollontai
    Alexandra Kollontai
    Alexandra Mikhailovna Kollontai was a Russian Communist revolutionary, first as a member of the Mensheviks, then from 1914 on as a Bolshevik. In 1919 she became the first female government minister in Europe...

  • Antoinette Konikow
    Antoinette Konikow
    Antoinette F. Buchholz Konikow was an American physician, feminist, and radical political activist. Konikow is best remembered as one of the pioneers of the American birth control movement and as a founding member of the Communist Party of America, forerunner of the Communist Party, USA...

     *
  • Frederick Krafft
    Frederick Krafft
    Frederick Krafft was an American socialist political activist and politician. Twice nominated by the Socialist Party of America as its candidate for Governor of New Jersey and twice a candidate for United States Congress, Krafft is best remembered as the defendant in a 1918 trial for alleged...

  • Maynard C. Krueger
    Maynard C. Krueger
    Maynard C. Krueger was an American socialist politician and an economics professor at the University of Chicago. He is best remembered as the 1940 Vice Presidential nominee of the Socialist Party of America.-Early years:...

  • William F. Kruse
    William Kruse (American)
    William F. "Bill" Kruse was an important head of the Young People's Socialist League in the 1910s. He was a member of the Socialist Party of America until 1921, acting as a leader of the party's Left Wing faction, loyal to the Third International...

     *

  • Harry W. Laidler
    Harry W. Laidler
    Harry Wellington Laidler was an American socialist functionary, writer, magazine editor, and politician. He is best remembered as Executive Director of the League for Industrial Democracy, successor to the Intercollegiate Socialist Society, and for his close political association with perennial...

     ISS
  • Algernon Lee
    Algernon Lee
    Algernon H. Lee was an American socialist politician and educator, best known as the Director of Education at the Rand School of Social Science for 35 years.-Early years:...

     ISS, SDF
  • Walter Lippman
  • Jack London
    Jack London
    John Griffith "Jack" London was an American author, journalist, and social activist. He was a pioneer in the then-burgeoning world of commercial magazine fiction and was one of the first fiction writers to obtain worldwide celebrity and a large fortune from his fiction alone...

     ISS
  • George Lunn
    George R. Lunn
    George Richard Lunn was an American clergyman and politician from New York. He was the first Socialist mayor in the State of New York, and was a U.S...

  • Theresa S. Malkiel
  • Mary Marcy
    Mary Marcy
    Mary Edna Tobias Marcy was an American socialist author, pamphleteer, poet, and magazine editor. She is best remembered for her muckraking series of magazine articles on the meat industry, "Letters of a Pork Packer's Stenographer," as author of a widely translated socialist propaganda pamphlet...

  • James H. Maurer
    James H. Maurer
    James Hudson "Jim" Maurer was a prominent American trade unionist who twice ran for the office of Vice President of the United States on the ticket of the Socialist Party of America.-Early years:...

      SDF
  • Jasper McLevy
    Jasper McLevy
    Jasper McLevy was an American politician who served as mayor of Bridgeport, Connecticut from 1933-1957. He was a member of the Socialist Party, later leaving in protest to join the Social Democratic Federation....

     SDF
  • David McReynolds
    David McReynolds
    David McReynolds is an American democratic socialist and pacifist activist who described himself as "a peace movement bureaucrat" during his 40-year career with Liberation magazine and the War Resisters League...

     SPUSA
  • Walter Thomas Mills
    Walter Thomas Mills
    Walter Thomas Mills was an American socialist activist, educator, lecturer, writer, and newspaper publisher. He is best remembered for the role he played in the Socialist Party of America during the first decade of the 20th Century as one of the leaders of the organization's moderate wing...

  • Tom Mooney
    Thomas Mooney
    Thomas Joseph "Tom" Mooney was an American political activist and labor leader, who was convicted with Warren K. Billings of the San Francisco Preparedness Day Bombing of 1916...

  • Thomas J. Morgan
    Thomas J. Morgan
    Thomas J. "Tommy" Morgan, Jr. was an English-born American labor leader and socialist political activist. Morgan is best remembered as one of the pioneer English-speaking Socialists in the city of Chicago and a frequent candidate for public office of the Socialist Party of America...

  • Gustavus Myers
    Gustavus Myers
    Gustavus Myers was an American journalist and historian who published a series of influential studies on capital formation. His name is associated with the muckraking era of American literature.-Early years:...

  • Scott Nearing
    Scott Nearing
    Scott Nearing was an American radical economist, educator, writer, political activist, and advocate of simple living.-The early years:...

  • Reinhold Niebuhr
    Reinhold Niebuhr
    Karl Paul Reinhold Niebuhr was an American theologian and commentator on public affairs. Starting as a leftist minister in the 1920s indebted to theological liberalism, he shifted to the new Neo-Orthodox theology in the 1930s, explaining how the sin of pride created evil in the world...

  • Santeri Nuorteva
    Santeri Nuorteva
    Santeri Nuorteva was a Finnish-Soviet journalist and one of the first members of the Finnish parliament. Nuorteva served in the Finnish parliament as a member of the Social Democratic Party from 1907–1908 and 1909–1910...

  • Kate Richards O'Hare
    Kate Richards O'Hare
    Kate Richards O'Hare was an American Socialist Party activist, editor, and orator best known for her controversial imprisonment during World War I.-Biography:...

  • James Oneal
    James Oneal
    James "Jim" Oneal , a founding member of the Socialist Party of America , was a prominent socialist journalist, historian, and party activist who played a decisive role in the bitter party splits of 1919-21 and 1934-36.-Early years:...

     SDF
  • Mary White Ovington
    Mary White Ovington
    Mary White Ovington was a suffragette, socialist, Unitarian, journalist, and co-founder of the NAACP.-Biography:...

  • Joseph Arthur Padway
    Joseph Arthur Padway
    Joseph Arthur Padway was a U.S. labor lawyer and politician. Padway, who was born in Leeds, England, went to Milwaukee in 1905. Admitted to the Wisconsin bar in 1912, he was appointed legal counsel for the Wisconsin State Federation of Labor three years later...

  • Jacob Panken
    Jacob Panken
    Jacob Panken was an American socialist politician, best remembered for his tenure as a New York municipal judge and frequent candidacies for high elected office on the ticket of the Socialist Party of America.-Early years:...

  • A. Philip Randolph
    A. Philip Randolph
    Asa Philip Randolph was a leader in the African American civil-rights movement and the American labor movement. He organized and led the Brotherhood of Sleeping Car Porters, the first predominantly Negro labor union. In the early civil-rights movement, Randolph led the March on Washington...

     SDF, SDUSA
  • John Reed *
  • Victor Reuther DSOC
  • Walter Reuther
    Walter Reuther
    Walter Philip Reuther was an American labor union leader, who made the United Automobile Workers a major force not only in the auto industry but also in the Democratic Party in the mid 20th century...


  • Charles Edward Russell
    Charles Edward Russell
    Charles Edward Russell was an American journalist, politician, and a co-founder of the National Association for the Advancement of Colored People...

  • Bayard Rustin
    Bayard Rustin
    Bayard Rustin was an American leader in social movements for civil rights, socialism, pacifism and non-violence, and gay rights.In the pacifist Fellowship of Reconciliation , Rustin practiced nonviolence...

     SDUSA
  • Carl Sandburg
    Carl Sandburg
    Carl Sandburg was an American writer and editor, best known for his poetry. He won three Pulitzer Prizes, two for his poetry and another for a biography of Abraham Lincoln. H. L. Mencken called Carl Sandburg "indubitably an American in every pulse-beat."-Biography:Sandburg was born in Galesburg,...

  • Margaret Sanger
    Margaret Sanger
    Margaret Higgins Sanger was an American sex educator, nurse, and birth control activist. Sanger coined the term birth control, opened the first birth control clinic in the United States, and established Planned Parenthood...

  • Roland D. Sawyer
    Roland D. Sawyer
    Roland Douglas Sawyer was a Congregationalist minister and for nearly 30 years a Massachusetts state legislator. He is best remembered as one of the leading Christian socialists of the first decade of the 20th century and as the author of an array of self-published books and pamphlets on genealogy...

  • Clarence Senior
    Clarence Senior
    Clarence Ollson Senior was, as a young man, an American socialist political activist best remembered as the National Executive Secretary of the Socialist Party of America during the 1930s. Originally a protégé of Presidential candidate Norman Thomas, during the inner-party fight of the 1930s,...

  • Max Shachtman
    Max Shachtman
    Max Shachtman was an American Marxist theorist. He evolved from being an associate of Leon Trotsky to a social democrat and mentor of senior assistants to AFL-CIO President George Meany.-Beginnings:...

  • Abraham Shiplacoff
    Abraham Shiplacoff
    Abraham Isaac "Abe" Shiplacoff was a Russian-born Jewish-American trade union organizer and left wing political activist. Shiplacoff is best remembered as the first Socialist Assemblyman elected in the state of New York and as a prominent target of prosecution for sedition under the Espionage Act...

  • Upton Sinclair
    Upton Sinclair
    Upton Beall Sinclair Jr. , was an American author who wrote close to one hundred books in many genres. He achieved popularity in the first half of the twentieth century, acquiring particular fame for his classic muckraking novel, The Jungle . It exposed conditions in the U.S...

     ISS
  • John W. Slayton
    John W. Slayton
    John W. Slayton was an American socialist lecturer and politician. He is best remembered as one of the Socialist Party of America's leading propagandists in the Eastern United States during the decade of the 1910s.-Early years:...

  • John Spargo
    John Spargo
    John Spargo was a British-born American socialist political activist, orator, and writer who later became a renowned expert in the history and crafts of Vermont...

     SDL
  • Seymour Stedman
    Seymour Stedman
    Seymour Stedman was a prominent civil liberties lawyer and a leader of the Socialist Party of America. He is best remembered as the 1920 Vice Presidential candidate of the Socialist Party of America, when he ran for office on a ticket headed by Eugene V...

  • Charles P. Steinmetz
  • J.G. Phelps Stokes ISS
  • Rose Pastor Stokes
    Rose Pastor Stokes
    Rose Harriet Pastor Stokes was a Jewish-American socialist activist, writer, birth control advocate, and feminist. She was active in labor politics and women's issues, and was a founding member of the Communist Party of America in 1919. She was a figure of some public notoriety for having married...

     *
  • Maurice Sugar
    Maurice Sugar
    Maurice Sugar was an American political activist and labor attorney. He is best remembered as the General Counsel of the United Auto Workers Union from 1937 to 1946.-Early years:...

  • Norman Thomas
    Norman Thomas
    Norman Mattoon Thomas was a leading American socialist, pacifist, and six-time presidential candidate for the Socialist Party of America.-Early years:...

  • Henry M. Tichenor
    Henry M. Tichenor
    Henry M. Tichenor was a writer and magazine editor prominent in the socialist and freethinking movements during the Progressive Era and the Golden Age of Freethought of American history. His writings frequently condemned organized religion, Christianity in particular, as a tool used by the upper...

  • Hermon F. Titus
    Hermon F. Titus
    Hermon Franklin Titus 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 during the first decade of the 20th...

  • Gus Tyler
    Gus Tyler
    August "Gus" Tyler was an American socialist activist of the 1930s, a labor union official, author, and newspaper columnist...

  • Ernest Untermann
  • Charles H. Vail
  • Baruch Charney Vladeck
    Baruch Charney Vladeck
    Baruch Charney Vladeck was an American Jewish labor leader, manager of the Jewish Daily Forward for twenty years, and a member of the New York City Council.-Early years:...

  • Alfred Wagenknecht
    Alfred Wagenknecht
    Alfred Wagenknecht was an American Marxist activist and political functionary. He is best remembered for having played a critical role in the establishment of the American Communist Party in 1919 as a leader of the Left Wing Section of the Socialist Party...

     *
  • Louis Waldman
    Louis Waldman
    Louis Waldman was a leading figure in the Socialist Party of America from the late 1910s and through the middle 1930s, a founding member of the Social Democratic Federation, and a prominent New York labor lawyer.-Early years:...

     SDF
  • Julius Wayland
    Julius Wayland
    Julius Wayland was a Mid-Western US socialist during the Progressive Era. He is most noted for publishing Appeal to Reason, a socialist publication often deemed to be the most important socialist periodical of the time....

  • John M. Work
    John M. Work
    John McClelland Work was an American socialist writer, lecturer, activist, and political functionary. Work is best remembered as a founding member of the Socialist Party of America and as the author of one of its best-selling propaganda tracts of the first decade of the 20th Century...

  • Frank P. Zeidler
    Frank P. Zeidler
    Frank Paul Zeidler was an American Socialist politician and Mayor of Milwaukee, Wisconsin, serving three terms from April 20, 1948 to April 18, 1960. He was the most recent Socialist mayor of any major American city, although U.S. Senator Bernie Sanders was the mayor of Burlington, the largest...

     SPUSA


Annotated list

Key:
* Went on to join the Communist Party
Communist Party USA
The Communist Party USA is a Marxist political party in the United States, established in 1919. It has a long, complex history that is closely related to the histories of similar communist parties worldwide and the U.S. labor movement....

, Communist Labor Party
Communist Labor Party
The Communist Labor Party of America was one of the organizational predecessors of the Communist Party USA. The group was established at the end of August 1919 following a three-way split of the Socialist Party of America...

 or Workers Party of America
Workers Party of America
The Workers Party of America was the name of the legal party organization used by the Communist Party USA from the last days of 1921 until the middle of 1929. As a legal political party the Workers Party accepted affiliation from independent socialist groups such as the African Blood Brotherhood,...

ISS A founder or key member of the Intercollegiate Socialist Society
Intercollegiate Socialist Society
The Intercollegiate Socialist Society was the a Socialist student organization from 1905-1921. It attracted many prominent intellectuals and writers and acted as the unofficial Socialist Party of America student wing...

, 1905, later League for Industrial Democracy
League for Industrial Democracy
The League for Industrial Democracy , from 1960-1965 known as the Students for a Democratic Society , was founded in 1905 by a group of notable socialists including Harry W. Laidler, Jack London, Norman Thomas, Upton Sinclair, and J.G. Phelps Stokes...

IWW A founder of the Industrial Workers of the World
Industrial Workers of the World
The Industrial Workers of the World is an international union. At its peak in 1923, the organization claimed some 100,000 members in good standing, and could marshal the support of perhaps 300,000 workers. Its membership declined dramatically after a 1924 split brought on by internal conflict...

, 1905.
SDL Left to found the Social Democratic League of America, 1917.
SDF Left to found the Social Democratic Federation, 1936.
SDUSA Continued into Social Democrats USA
Social Democrats USA
Social Democrats, USA was the principal association of U.S. social democrats from 1972–2005.SDUSA was founded in 1972 when the Socialist Party of America renamed itself Social Democrats, USA...

, 1973
SPUSA Went on to join the Socialist Party USA
Socialist Party USA
The Socialist Party USA is a multi-tendency democratic-socialist party in the United States. The party states that it is the rightful continuation and successor to the tradition of the Socialist Party of America, which had lasted from 1901 to 1972.The party is officially committed to left-wing...

, 1973
DSOC Went on to join the Democratic Socialist Organizing Committee
Democratic Socialist Organizing Committee
The Democratic Socialist Organizing Committee was founded in 1973 by Michael Harrington, who led a minority caucus in the Socialist Party. Harrington's caucus supported George McGovern's his call for a cease-fire and immediate withdrawal of U.S. forces from Vietnam...

, 1973, later Democratic Socialists of America
Democratic Socialists of America
Democratic Socialists of America is a social-democratic organization in the United States and the U.S. affiliate of the Socialist International, an international federation of social-democratic,democratic socialist and labor political parties and organizations.DSA was formed in 1982 by a merger of...


  • Martin Abern
    Martin Abern
    Martin Abern was a Marxist politician who was an important leader of the Communist youth movement of the 1920s as well as a founder of the American Trotskyist movement.-Early years:...

     *
  • Devere Allen
  • Elmer Allison
    Elmer Allison
    Elmer T. Allison was an American socialist political activist and newspaper editor. He is best remembered as the longtime editor of The Cleveland Socialist and The Toiler, forerunners of the official organ of the Communist Party, USA, The Daily Worker.-Early years:Elmer T...

     *
  • E.B. "Harry" Ault
    E.B. "Harry" Ault
    Erwin Bratton "Harry" Ault was an American socialist and trade union activist. He is best remembered as the editor of the Seattle Union Record, the long-running labor weekly published from 1912 to 1928. After termination of the Union Record, Ault worked as a commercial printer for a number of...

  • J. Mahlon Barnes
    J. Mahlon Barnes
    John Mahlon Barnes was an American trade union functionary and socialist political activist. Barnes is best remembered as the Executive Secretary of the Socialist Party of America from 1905 to 1911, during which time he originated the idea of the party's 1908 "Red Special" campaign train on behalf...

  • David P. Berenberg
    David P. Berenberg
    David Paul Berenberg was an American socialist teacher, editor, and writer. He is best remembered as a founder and editor of The American Socialist Quarterly, the theoretical magazine of the Socialist Party of America during the 1930s....

  • Victor L. Berger
    Victor L. Berger
    Victor Luitpold Berger was a founding member of the Socialist Party of America and an important and influential Socialist journalist who helped establish the so-called Sewer Socialist movement. The first Socialist elected to the U.S...

    , Congressman from Milwaukee
  • Barney Berlyn
  • Allan L. Benson
    Allan L. Benson
    Allan Louis Benson was an American newspaper editor and author who ran for President as the Socialist Party of America candidate in 1916.-Early years:Benson was born in Plainfield, Michigan on November 6, 1871. His father, Adelbert L...

    , 1916 candidate for Vice-President
  • Ella Reeve Bloor
    Ella Reeve Bloor
    Ella Reeve "Mother" Bloor was an American labor organizer and long-time activist in the socialist and communist movements.-Early years:...

     *
  • Roy E. Burt
    Roy E. Burt
    Roy Everett Burt was a Methodist clergyman and an American socialist politician and functionary. Burt is best remembered as the Executive Secretary of the Socialist Party of America from 1936 to 1939.-Early years:...

  • Frank Bohn
    Frank Bohn (socialist)
    Frank Bohn was an advocate of industrial unionism who was a founding member of the Industrial Workers of the World. From 1906 to 1908 he was the National Secretary of the Socialist Labor Party of America, before leaving to join forces with the rival Socialist Party of America...

     IWW
  • Earl Browder
    Earl Browder
    Earl Russell Browder was an American communist and General Secretary of the Communist Party USA from 1934 to 1945. He was expelled from the party in 1946.- Early years :...

     *, Communist Party leader and presidential candidate
  • James P. Cannon
    James P. Cannon
    James Patrick "Jim" Cannon was an American Trotskyist and a leader of the Socialist Workers Party.Born on February 11, 1890 in Rosedale, Kansas, he joined the Socialist Party of America in 1908 and the Industrial Workers of the World in 1911...

     *, leader of the Communist Party and Socialist Workers Party
    Socialist Workers Party (United States)
    The Socialist Workers Party is a far-left political organization in the United States. The group places a priority on "solidarity work" to aid strikes and is strongly supportive of Cuba...

  • Jack Carney
  • Travers Clement
    Travers Clement
    Travers Clement was an American socialist writer, politician, and political functionary. He is best remembered as an assistant to Angelica Balabanoff in the writing of her memoirs and for his tenure as the National Executive Secretary of the Socialist Party of America beginning in April 1939.-Early...

  • Joseph Coldwell
  • James Connolly
    James Connolly
    James Connolly was an Irish republican and socialist leader. He was born in the Cowgate area of Edinburgh, Scotland, to Irish immigrant parents and spoke with a Scottish accent throughout his life. He left school for working life at the age of 11, but became one of the leading Marxist theorists of...

    , Irish labor and nationalist leader
  • Eugene V. Debs
    Eugene V. Debs
    Eugene Victor Debs was an American union leader, one of the founding members of the International Labor Union and the Industrial Workers of the World , and several times the candidate of the Socialist Party of America for President of the United States...

     IWW, labor organizer, Presidential candidate
  • David Dubinsky
    David Dubinsky
    David Dubinsky was an American labor leader...

    , labor leader
  • Max Eastman
    Max Eastman
    Max Forrester Eastman was an American writer on literature, philosophy and society, a poet, and a prominent political activist. For many years, Eastman was a supporter of socialism, a leading patron of the Harlem Renaissance and an activist for a number of liberal and radical causes...

     *, writer
  • J. Louis Engdahl
    J. Louis Engdahl
    John Louis Engdahl was an American socialist journalist and newspaper editor. One of the leading journalists of the Socialist Party of America, Engdahl joined the Communist movement in 1921 and continued to employ his talents in that organization as the first editor of The Daily Worker...

  • Elizabeth Gurley Flynn
    Elizabeth Gurley Flynn
    Elizabeth Gurley Flynn was a labor leader, activist, and feminist who played a leading role in the Industrial Workers of the World . Flynn was a founding member of the American Civil Liberties Union and a visible proponent of women's rights, birth control, and women's suffrage...

     *, IWW and Communist leader
  • William Z. Foster
    William Z. Foster
    William Foster was a radical American labor organizer and Marxist politician, whose career included a lengthy stint as General Secretary of the Communist Party USA...

     *, Communist leader and presidential candidate
  • Louis Fraina *
  • Joseph Freeman
    Joseph Freeman (writer)
    Joseph "Joe" Freeman was an American writer and magazine editor. He is best remembered as a contributor and editor to The New Masses, a literary and artistic magazine closely associated with the Communist Party USA, and as a founding editor of the magazine Partisan Review.-Early years:Joseph...

     *
  • Samuel Friedman
    Samuel H. Friedman
    Samuel H. Friedman was a journalist and a longtime labor union activist. He twice ran unsuccessfully for Vice President of the United States on the Socialist Party of America ticket. In the 1952, the Socialist National Party Congress nominated Friedman to run along side its presidential candidate,...

    , Vice-presidential candidate
  • Julius Gerber
    Julius Gerber
    Julius Gerber was a leading Socialist Party of America party official and politician during the first two decades of the 20th century. Gerber headed the important Socialist Party unit for New York City and its environs from 1911 through 1922...

  • Adolph Germer
    Adolph Germer
    Adoph Germer 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...

  • Arturo Giovannitti
    Arturo Giovannitti
    Arturo M. Giovannitti was an Italian-American union leader, socialist political activist, and poet. He is best remembered as one of the principal organizers of the 1912 Lawrence Textile Strike and as a defendant in a celebrated trial ensuing from that event.-Early years:Arturo Giovannitti was born...

  • Benjamin Gitlow
    Benjamin Gitlow
    Benjamin "Ben" Gitlow was a prominent American socialist politician of the early twentieth century and a founding member of the Communist Party USA. From the end of the 1930s, Gitlow turned to conservatism and wrote two sensational exposés of American Communism, books which were very influential...

     *
  • Carl Haessler
    Carl Haessler
    Carl Haessler was an American political activist, conscription resister, newspaper editor, and trade union organizer. He is best remembered as an imprisoned conscientious objector during World War I and as the longtime head of the Federated Press, a left wing news service which supplied content to...

     *
  • Emanuel Haldeman-Julius SDL
  • Job Harriman
    Job Harriman
    Job Harriman was an ordained minister who later became an agnostic and a socialist. In 1900 he ran for Vice President of the United States along with Eugene Debs on the ticket of the Socialist Party of America. He later twice ran for mayor of Los Angeles, drawing considerable attention and support...

    , Vice-presidential candidate
  • Michael Harrington
    Michael Harrington
    Edward Michael "Mike" Harrington was an American democratic socialist, writer, political activist, professor of political science, radio commentator and founder of the Democratic Socialists of America.-Personal life:...

     DSOC, author
  • Hubert Harrison
    Hubert Harrison
    Hubert Henry Harrison was a West Indian-American writer, orator, educator, critic, and radical socialist political activist based in Harlem, New York. He was described by activist A. Philip Randolph as “the father of Harlem radicalism” and by the historian Joel Augustus Rogers as “the foremost...

  • Max S. Hayes
    Max S. Hayes
    Maximillian Sebastian "Max" Hayes was a newspaper editor, trade union activist, and socialist politician. He is best remembered as the long-time editor of the Cleveland Citizen and as the Vice Presidential candidate of the Farmer-Labor Party ticket in 1920.-Early years:Max Hayes was born in...

    , labor leader
  • Bill Haywood
    Bill Haywood
    William Dudley Haywood , better known as "Big Bill" Haywood, was a founding member and leader of the Industrial Workers of the World , and a member of the Executive Committee of the Socialist Party of America...

     IWW
  • Emil Herman
    Emil Herman
    Emil M. Herman was a German-American socialist and anti-war activist. A three-time candidate for Congress on the ticket of the Socialist Party of America, Herman is best remembered for his imprisonment by the Wilson administration due to his political activity in the outspokenly anti-war Socialist...

  • George D. Herron
    George D. Herron
    George D. Herron was an American clergyman, lecturer, writer, and Christian socialist activist. Herron is best remembered as a leading exponent of the so-called "Social Gospel" movement and for his highly publicized divorce and remarriage to the daughter of a wealthy benefactor which scandalized...

  • Morris Hillquit
    Morris Hillquit
    Morris Hillquit was a founder and leader of the Socialist Party of America and prominent labor lawyer in New York City's Lower East Side during the early 20th century.-Early years:...

     ISS, labor lawyer, New York mayoral candidate
  • Daniel Hoan
    Daniel Hoan
    Daniel Webster "Dan" Hoan was a United States lawyer and politician. He became the second Socialist mayor of Milwaukee, Wisconsin, and his tenure is generally considered to be the longest continuous socialist administration in U.S. history...

    , mayor of Milwaukee
  • Darlington Hoopes
    Darlington Hoopes
    Darlington Hoopes was the candidate of the Socialist Party of America for President of the United States in the 1952 and 1956 presidential elections.-Early years:...

     SPUSA
  • Jessie Wallace Hughan
    Jessie Wallace Hughan
    Jessie Wallace Hughan was an American educator, a socialist activist, and a radical pacifist. During her college days she was one of four co-founders of Alpha Omicron Pi, a national sorority for university women. She also was a founder and the first Secretary of the War Resisters League,...

     ISS
  • Haim Kantorovitch
    Haim Kantorovitch
    Haim Kantorovitch was an American socialist teacher, writer, and Marxist theoretician. Kantorovitch is best remembered as one of the intellectual leaders of the Militant faction of the Socialist Party of America in the early 1930s and as a founder and editor of The American Socialist Quarterly,...

  • Helen Keller
    Helen Keller
    Helen Adams Keller was an American author, political activist, and lecturer. She was the first deafblind person to earn a Bachelor of Arts degree....

  • Charles H. Kerr, publisher
  • George R. Kirkpatrick
    George Ross Kirkpatrick
    George Ross "Kirk" Kirkpatrick was an American anti-militarist writer and political activist. He is best remembered as the 1916 Vice Presidential nominee of the Socialist Party of America...

  • Antoinette Konikow
    Antoinette Konikow
    Antoinette F. Buchholz Konikow was an American physician, feminist, and radical political activist. Konikow is best remembered as one of the pioneers of the American birth control movement and as a founding member of the Communist Party of America, forerunner of the Communist Party, USA...

     *
  • Frederick Krafft
    Frederick Krafft
    Frederick Krafft was an American socialist political activist and politician. Twice nominated by the Socialist Party of America as its candidate for Governor of New Jersey and twice a candidate for United States Congress, Krafft is best remembered as the defendant in a 1918 trial for alleged...

  • Maynard C. Krueger
    Maynard C. Krueger
    Maynard C. Krueger was an American socialist politician and an economics professor at the University of Chicago. He is best remembered as the 1940 Vice Presidential nominee of the Socialist Party of America.-Early years:...

  • William F. Kruse
    William Kruse (American)
    William F. "Bill" Kruse was an important head of the Young People's Socialist League in the 1910s. He was a member of the Socialist Party of America until 1921, acting as a leader of the party's Left Wing faction, loyal to the Third International...

     *
  • Harry W. Laidler
    Harry W. Laidler
    Harry Wellington Laidler was an American socialist functionary, writer, magazine editor, and politician. He is best remembered as Executive Director of the League for Industrial Democracy, successor to the Intercollegiate Socialist Society, and for his close political association with perennial...

     ISS
  • Algernon Lee
    Algernon Lee
    Algernon H. Lee was an American socialist politician and educator, best known as the Director of Education at the Rand School of Social Science for 35 years.-Early years:...

     ISS, SDF
  • Walter Lippman, journalist
  • Jack London
    Jack London
    John Griffith "Jack" London was an American author, journalist, and social activist. He was a pioneer in the then-burgeoning world of commercial magazine fiction and was one of the first fiction writers to obtain worldwide celebrity and a large fortune from his fiction alone...

     ISS
  • Meyer London
    Meyer London
    Meyer London was an American politician from New York City. He was one of only two members of the Socialist Party of America elected to the United States Congress.-Early years:...

    , Congressman from New York City
  • George Lunn
    George R. Lunn
    George Richard Lunn was an American clergyman and politician from New York. He was the first Socialist mayor in the State of New York, and was a U.S...

    , mayor of Schenectady, New York
    Schenectady, New York
    Schenectady is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2010 census, the city had a population of 66,135...

  • Theresa S. Malkiel
  • Mary Marcy
    Mary Marcy
    Mary Edna Tobias Marcy was an American socialist author, pamphleteer, poet, and magazine editor. She is best remembered for her muckraking series of magazine articles on the meat industry, "Letters of a Pork Packer's Stenographer," as author of a widely translated socialist propaganda pamphlet...

  • James H. Maurer
    James H. Maurer
    James Hudson "Jim" Maurer was a prominent American trade unionist who twice ran for the office of Vice President of the United States on the ticket of the Socialist Party of America.-Early years:...

      SDF
  • Jasper McLevy
    Jasper McLevy
    Jasper McLevy was an American politician who served as mayor of Bridgeport, Connecticut from 1933-1957. He was a member of the Socialist Party, later leaving in protest to join the Social Democratic Federation....

     SDF, mayor of Bridgeport, Connecticut
    Bridgeport, Connecticut
    Bridgeport is the most populous city in the U.S. state of Connecticut. Located in Fairfield County, the city had an estimated population of 144,229 at the 2010 United States Census and is the core of the Greater Bridgeport area...

  • David McReynolds
    David McReynolds
    David McReynolds is an American democratic socialist and pacifist activist who described himself as "a peace movement bureaucrat" during his 40-year career with Liberation magazine and the War Resisters League...

     SPUSA, peace advocate, SPUSA presidential candidate
  • Walter Thomas Mills
    Walter Thomas Mills
    Walter Thomas Mills was an American socialist activist, educator, lecturer, writer, and newspaper publisher. He is best remembered for the role he played in the Socialist Party of America during the first decade of the 20th Century as one of the leaders of the organization's moderate wing...

  • Tom Mooney
    Thomas Mooney
    Thomas Joseph "Tom" Mooney was an American political activist and labor leader, who was convicted with Warren K. Billings of the San Francisco Preparedness Day Bombing of 1916...

  • Thomas J. Morgan
    Thomas J. Morgan
    Thomas J. "Tommy" Morgan, Jr. was an English-born American labor leader and socialist political activist. Morgan is best remembered as one of the pioneer English-speaking Socialists in the city of Chicago and a frequent candidate for public office of the Socialist Party of America...

  • Gustavus Myers
    Gustavus Myers
    Gustavus Myers was an American journalist and historian who published a series of influential studies on capital formation. His name is associated with the muckraking era of American literature.-Early years:...

  • Scott Nearing
    Scott Nearing
    Scott Nearing was an American radical economist, educator, writer, political activist, and advocate of simple living.-The early years:...

  • Reinhold Niebuhr
    Reinhold Niebuhr
    Karl Paul Reinhold Niebuhr was an American theologian and commentator on public affairs. Starting as a leftist minister in the 1920s indebted to theological liberalism, he shifted to the new Neo-Orthodox theology in the 1930s, explaining how the sin of pride created evil in the world...

    , theologian
  • Santeri Nuorteva
    Santeri Nuorteva
    Santeri Nuorteva was a Finnish-Soviet journalist and one of the first members of the Finnish parliament. Nuorteva served in the Finnish parliament as a member of the Social Democratic Party from 1907–1908 and 1909–1910...

  • Kate Richards O'Hare
    Kate Richards O'Hare
    Kate Richards O'Hare was an American Socialist Party activist, editor, and orator best known for her controversial imprisonment during World War I.-Biography:...

  • James Oneal
    James Oneal
    James "Jim" Oneal , a founding member of the Socialist Party of America , was a prominent socialist journalist, historian, and party activist who played a decisive role in the bitter party splits of 1919-21 and 1934-36.-Early years:...

     SDF
  • Mary White Ovington
    Mary White Ovington
    Mary White Ovington was a suffragette, socialist, Unitarian, journalist, and co-founder of the NAACP.-Biography:...

    , co-founder of the NAACP
    National Association for the Advancement of Colored People
    The National Association for the Advancement of Colored People, usually abbreviated as NAACP, is an African-American civil rights organization in the United States, formed in 1909. Its mission is "to ensure the political, educational, social, and economic equality of rights of all persons and to...

  • Joseph Arthur Padway
    Joseph Arthur Padway
    Joseph Arthur Padway was a U.S. labor lawyer and politician. Padway, who was born in Leeds, England, went to Milwaukee in 1905. Admitted to the Wisconsin bar in 1912, he was appointed legal counsel for the Wisconsin State Federation of Labor three years later...

  • Jacob Panken
    Jacob Panken
    Jacob Panken was an American socialist politician, best remembered for his tenure as a New York municipal judge and frequent candidacies for high elected office on the ticket of the Socialist Party of America.-Early years:...

    , New York municipal judge
  • A. Philip Randolph
    A. Philip Randolph
    Asa Philip Randolph was a leader in the African American civil-rights movement and the American labor movement. He organized and led the Brotherhood of Sleeping Car Porters, the first predominantly Negro labor union. In the early civil-rights movement, Randolph led the March on Washington...

     SDF, SDUSA, labor and civil rights leader
  • John Reed *, author
  • Victor Reuther DSOC, labor organizer
  • Walter Reuther
    Walter Reuther
    Walter Philip Reuther was an American labor union leader, who made the United Automobile Workers a major force not only in the auto industry but also in the Democratic Party in the mid 20th century...

    , labor organizer
  • Charles Edward Russell
    Charles Edward Russell
    Charles Edward Russell was an American journalist, politician, and a co-founder of the National Association for the Advancement of Colored People...

    , writer
  • Bayard Rustin
    Bayard Rustin
    Bayard Rustin was an American leader in social movements for civil rights, socialism, pacifism and non-violence, and gay rights.In the pacifist Fellowship of Reconciliation , Rustin practiced nonviolence...

     SDUSA, civil rights organizer
  • Carl Sandburg
    Carl Sandburg
    Carl Sandburg was an American writer and editor, best known for his poetry. He won three Pulitzer Prizes, two for his poetry and another for a biography of Abraham Lincoln. H. L. Mencken called Carl Sandburg "indubitably an American in every pulse-beat."-Biography:Sandburg was born in Galesburg,...

    , poet
  • Margaret Sanger
    Margaret Sanger
    Margaret Higgins Sanger was an American sex educator, nurse, and birth control activist. Sanger coined the term birth control, opened the first birth control clinic in the United States, and established Planned Parenthood...

    , advocate of family planning
    Family planning
    Family planning is the planning of when to have children, and the use of birth control and other techniques to implement such plans. Other techniques commonly used include sexuality education, prevention and management of sexually transmitted infections, pre-conception counseling and...

  • Roland D. Sawyer
    Roland D. Sawyer
    Roland Douglas Sawyer was a Congregationalist minister and for nearly 30 years a Massachusetts state legislator. He is best remembered as one of the leading Christian socialists of the first decade of the 20th century and as the author of an array of self-published books and pamphlets on genealogy...

  • Clarence Senior
    Clarence Senior
    Clarence Ollson Senior was, as a young man, an American socialist political activist best remembered as the National Executive Secretary of the Socialist Party of America during the 1930s. Originally a protégé of Presidential candidate Norman Thomas, during the inner-party fight of the 1930s,...

  • Max Shachtman
    Max Shachtman
    Max Shachtman was an American Marxist theorist. He evolved from being an associate of Leon Trotsky to a social democrat and mentor of senior assistants to AFL-CIO President George Meany.-Beginnings:...

  • Upton Sinclair
    Upton Sinclair
    Upton Beall Sinclair Jr. , was an American author who wrote close to one hundred books in many genres. He achieved popularity in the first half of the twentieth century, acquiring particular fame for his classic muckraking novel, The Jungle . It exposed conditions in the U.S...

     ISS, writer, organized End Poverty in California (EPIC)
    End Poverty in California movement
    Standing for End Poverty in California, EPIC was an effort for well-known muckraking writer and former Socialist Upton Sinclair to implement socialist reforms through California's Democratic Party during the Great Depression by recruiting supporters into the party and then securing that party's...

  • John W. Slayton
    John W. Slayton
    John W. Slayton was an American socialist lecturer and politician. He is best remembered as one of the Socialist Party of America's leading propagandists in the Eastern United States during the decade of the 1910s.-Early years:...

  • John Spargo
    John Spargo
    John Spargo was a British-born American socialist political activist, orator, and writer who later became a renowned expert in the history and crafts of Vermont...

     SDL, writer
  • Seymour Stedman
    Seymour Stedman
    Seymour Stedman was a prominent civil liberties lawyer and a leader of the Socialist Party of America. He is best remembered as the 1920 Vice Presidential candidate of the Socialist Party of America, when he ran for office on a ticket headed by Eugene V...

  • Charles P. Steinmetz, physicist
  • J.G. Phelps Stokes ISS, social reformer
  • Rose Pastor Stokes
    Rose Pastor Stokes
    Rose Harriet Pastor Stokes was a Jewish-American socialist activist, writer, birth control advocate, and feminist. She was active in labor politics and women's issues, and was a founding member of the Communist Party of America in 1919. She was a figure of some public notoriety for having married...

     *, social reformer
  • Maurice Sugar
    Maurice Sugar
    Maurice Sugar was an American political activist and labor attorney. He is best remembered as the General Counsel of the United Auto Workers Union from 1937 to 1946.-Early years:...

  • Norman Thomas
    Norman Thomas
    Norman Mattoon Thomas was a leading American socialist, pacifist, and six-time presidential candidate for the Socialist Party of America.-Early years:...

    , peace advocate, Presidential candidate
  • Henry M. Tichenor
    Henry M. Tichenor
    Henry M. Tichenor was a writer and magazine editor prominent in the socialist and freethinking movements during the Progressive Era and the Golden Age of Freethought of American history. His writings frequently condemned organized religion, Christianity in particular, as a tool used by the upper...

  • Hermon F. Titus
    Hermon F. Titus
    Hermon Franklin Titus 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 during the first decade of the 20th...

  • Gus Tyler
    Gus Tyler
    August "Gus" Tyler was an American socialist activist of the 1930s, a labor union official, author, and newspaper columnist...

    , writer and labor leader
  • Ernest Untermann
  • Charles H. Vail
  • Baruch Charney Vladeck
    Baruch Charney Vladeck
    Baruch Charney Vladeck was an American Jewish labor leader, manager of the Jewish Daily Forward for twenty years, and a member of the New York City Council.-Early years:...

  • Alfred Wagenknecht
    Alfred Wagenknecht
    Alfred Wagenknecht was an American Marxist activist and political functionary. He is best remembered for having played a critical role in the establishment of the American Communist Party in 1919 as a leader of the Left Wing Section of the Socialist Party...

     *
  • Louis Waldman
    Louis Waldman
    Louis Waldman was a leading figure in the Socialist Party of America from the late 1910s and through the middle 1930s, a founding member of the Social Democratic Federation, and a prominent New York labor lawyer.-Early years:...

     SDF
  • Julius Wayland
    Julius Wayland
    Julius Wayland was a Mid-Western US socialist during the Progressive Era. He is most noted for publishing Appeal to Reason, a socialist publication often deemed to be the most important socialist periodical of the time....

    , publisher of The Appeal to Reason
  • John M. Work
    John M. Work
    John McClelland Work was an American socialist writer, lecturer, activist, and political functionary. Work is best remembered as a founding member of the Socialist Party of America and as the author of one of its best-selling propaganda tracts of the first decade of the 20th Century...

  • Frank P. Zeidler
    Frank P. Zeidler
    Frank Paul Zeidler was an American Socialist politician and Mayor of Milwaukee, Wisconsin, serving three terms from April 20, 1948 to April 18, 1960. He was the most recent Socialist mayor of any major American city, although U.S. Senator Bernie Sanders was the mayor of Burlington, the largest...

     SPUSA, mayor of Milwaukee, SPUSA presidential candidate




Key:
* Went on to join the Communist Party
Communist Party USA
The Communist Party USA is a Marxist political party in the United States, established in 1919. It has a long, complex history that is closely related to the histories of similar communist parties worldwide and the U.S. labor movement....

, Communist Labor Party
Communist Labor Party
The Communist Labor Party of America was one of the organizational predecessors of the Communist Party USA. The group was established at the end of August 1919 following a three-way split of the Socialist Party of America...

 or Workers Party of America
Workers Party of America
The Workers Party of America was the name of the legal party organization used by the Communist Party USA from the last days of 1921 until the middle of 1929. As a legal political party the Workers Party accepted affiliation from independent socialist groups such as the African Blood Brotherhood,...

ISS A founder or key member of the Intercollegiate Socialist Society
Intercollegiate Socialist Society
The Intercollegiate Socialist Society was the a Socialist student organization from 1905-1921. It attracted many prominent intellectuals and writers and acted as the unofficial Socialist Party of America student wing...

, 1905, later League for Industrial Democracy
League for Industrial Democracy
The League for Industrial Democracy , from 1960-1965 known as the Students for a Democratic Society , was founded in 1905 by a group of notable socialists including Harry W. Laidler, Jack London, Norman Thomas, Upton Sinclair, and J.G. Phelps Stokes...

IWW A founder of the Industrial Workers of the World
Industrial Workers of the World
The Industrial Workers of the World is an international union. At its peak in 1923, the organization claimed some 100,000 members in good standing, and could marshal the support of perhaps 300,000 workers. Its membership declined dramatically after a 1924 split brought on by internal conflict...

, 1905.
SDL Left to found the Social Democratic League of America, 1917.
SDF Left to found the Social Democratic Federation, 1936.
SDUSA Continued into Social Democrats USA
Social Democrats USA
Social Democrats, USA was the principal association of U.S. social democrats from 1972–2005.SDUSA was founded in 1972 when the Socialist Party of America renamed itself Social Democrats, USA...

, 1973
SPUSA Went on to join the Socialist Party USA
Socialist Party USA
The Socialist Party USA is a multi-tendency democratic-socialist party in the United States. The party states that it is the rightful continuation and successor to the tradition of the Socialist Party of America, which had lasted from 1901 to 1972.The party is officially committed to left-wing...

, 1973
DSOC Went on to join the Democratic Socialist Organizing Committee
Democratic Socialist Organizing Committee
The Democratic Socialist Organizing Committee was founded in 1973 by Michael Harrington, who led a minority caucus in the Socialist Party. Harrington's caucus supported George McGovern's his call for a cease-fire and immediate withdrawal of U.S. forces from Vietnam...

, 1973, later Democratic Socialists of America
Democratic Socialists of America
Democratic Socialists of America is a social-democratic organization in the United States and the U.S. affiliate of the Socialist International, an international federation of social-democratic,democratic socialist and labor political parties and organizations.DSA was formed in 1982 by a merger of...

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