The Communist Party of Great Britain (CPGB) was the largest Marxist-Leninist organisation in Britain and was founded in 1920 through a merger of several smaller Marxist groups. The party first gained prominence when many miners joined the CPGB in the 1926 general strike. In 1930, the CPGB founded the Daily Worker newspaper (renamed the Morning Star in 1966), which would remain the party's main publication throughout its existence. In 1936, members of the party were present at the Battle of Cable Street, helping organise resistance against the British Union of Fascists. In the Spanish Civil War, the CPGB worked with the USSR to create the British Battalion of the International Brigades, which party activist Bill Alexander commanded.

In World War II, the CPGB followed the Comintern position, initially opposing, but later supporting, the war in line with the involvement of the USSR. By the end of World War II, CPGB membership had nearly tripled and the party reached the height of its popularity. Many key CPGB members served as leaders of Britain's trade union movement, including Jessie Eden, David Ivon Jones, Abraham Lazarus, Ken Gill, Clem Beckett, GCT Giles, Mike Hicks, and Thora Silverthorne.

The CPGB's position on racial equality and anti-colonialism attracted many black activists to the party, including Trevor Carter, Charlie Hutchison, Dorothy Kuya, Billy Strachan, Peter Blackman, George Powe, Henry Gunter, Len Johnson, and Claudia Jones, who founded London's Notting Hill Carnival. In 1956, the CPGB experienced a significant loss of members due to its support of the Soviet military intervention in Hungary.Herbert Pimlott, "From 'Old Left' to 'New Labour'? Eric Hobsbawm and the Rhetoric of 'Realistic Marxism'", Labour/Le Travail, vol. 56 (2005), pg. 185. In the 1960s, CPGB activists supported Vietnamese communists fighting in the Vietnam War. In 1984, the leader of the CPGB's youth wing, Mark Ashton, founded Lesbians and Gays Support the Miners.

From 1956 until the late 1970s, the party was funded by the Soviet Union. After the dissolution of the Soviet Union in 1991, the party's Eurocommunist leadership disbanded the party, establishing Democratic Left. In 1988, the anti-Eurocommunist and Marxist-Leninist faction launched the Communist Party of Britain, which still exists today.

History

Formation The Communist Party of Great Britain was founded on 31 July 1920 at a Communist Unity Convention held at the Cannon Street hotel in London. The Third International decided that greater attempts should be made to establish communist parties across the world. The CPGB was formed by the merger of several smaller Marxist parties, including the British Socialist Party, the Communist Unity Group of the Socialist Labour Party and the South Wales Socialist Society.James Klugmann, History of the Communist Party of Great Britain, Volume One: Formation and Early Years, 1919–1924. London: Lawrence and Wishart, 1968; pp. 21, 25. Of the delegates sent to the conference, a large number of them were from the British Socialist Party and the Communist Unity Group. The party also gained the support of the Guild Communists faction of the National Guilds League, assorted shop stewards' and workers' committees, socialist clubs and individuals and many former members of the Hands Off Russia campaign. Several branches and many individual members of the Independent Labour Party also affiliated. As a member of the British Socialist Party, the Member of Parliament Cecil L'Estrange Malone joined the CPGB. A few days after the founding conference the new party published the first issue of its weekly newspaper, which was called the Communist and edited by Raymond Postgate.

In January 1921, the CPGB a second congress was held in Leeds., and the party was refounded. The majorities of Sylvia Pankhurst's group the Communist Party (British Section of the Third International), and the Scottish Communist Labour Party joined during this congress. The party benefited from a period of increased political radicalism in Britain just after the First World War and the Russian Revolution of October 1917, and was also represented in Britain by the Red Clydeside movement.The Papers of the Communist Party of Great Britain (1920–1994). Held at Labour History Archive and Study Centre .Online abstract and index available . Extent: 235.5 (841 boxes). Retrieved 14 June 2006.

During the negotiations leading to the initiation of the party, a number of issues were hotly contested. Among the most contentious were the questions of "parliamentarism" and the attitude of the Communist Party to the Labour Party. "Parliamentarism" referred to a strategy of contesting elections and working through existing parliaments. It was a strategy associated with the parties of the Second International and was opposed by those who wanted to break with Social Democracy. They contended that parliamentarism had caused the old parties to become devoted to reformism because it had encouraged them to place more importance on winning votes than on working for socialism, that it encouraged opportunists and place-seekers into the ranks of the movement and that it constituted an acceptance of the legitimacy of the existing governing institutions of capitalism. Similarly, affiliation to the Labour Party was opposed on the grounds that communists should not work with 'reformist' Social Democratic parties. These Left Communist positions enjoyed considerable support, including from Sylvia Pankhurst and Willie Gallacher. However, the Russian Communist Party took the opposing view. In 1920, Vladimir Lenin argued in his essay "Left Wing" Communism: An Infantile Disorder that the CPs should work with reformist trade unions and social democratic parties because these were the existing organisations of the working class. Lenin argued that if such organisations gained power, they would demonstrate that they were not really on the side of the working class, thus workers would become disillusioned and come over to supporting the Communist Party. Lenin's opinion prevailed eventually.

Initially, therefore, the CPGB attempted to work within the Labour Party, which at this time operated mainly as a federation of left-wing bodies, only having allowed individual membership since 1918. However, despite the support of James Maxton, the Independent Labour Party leader, the Labour Party decided against the affiliation of the Communist Party in 1921. Even while pursuing affiliation and seeking to influence Labour Party members, however, the CPGB promoted candidates of its own at parliamentary elections.

Following the refusal of their affiliation, the CPGB encouraged its members to join the Labour Party individually and to seek Labour Party endorsement or help for any candidatures. Several Communists thus became Labour Party candidates, and in the 1922 general election, Shapurji Saklatvala and Walton Newbold were both elected. As late as 1923 the National Executive Committee of the Labour Party endorsed Communist parliamentary candidates, and 38 Communists attended the 1923 Labour Party Conference.

1920s and 1930s In 1923, the party renamed its newspaper as the Workers Weekly. In 1923, the Workers' Weekly published a letter by J. R. Campbell urging British Army soldiers not to fire on striking workers. The Labour government of Prime Minister Ramsay MacDonald prosecuted him under the Incitement to Disaffection Act but withdrew the charges upon review. This led to the Liberal Party introducing a motion to establish an inquiry into the Labour government, which led to its resignation.

The affair of the forged Zinoviev Letter occurred during the subsequent general election late October 1924. Intended to suggest that the Communist Party in Britain was engaged in subversive activities among the British Armed Forces and elsewhere, the forgery's aim was to promote the electoral chances of the Conservative Party in the general election of 29 October; it was probably the work of SIS (MI6) or White Russian counter-revolutionaries.Bennett, A Most Extraordinary and Mysterious Business, pp. 2–3.

After Labour lost to the Conservative Party in the election, it blamed the Zinoviev Letter for its defeat. In the aftermath of the Campbell Case and the Zinoviev letter, Labour expelled Communist Party members and banned them from running as its parliamentary candidates in the future. After the 1926 British general strike, it also disbanded 26 Constituency Labour Parties which resisted the ruling or were otherwise deemed too sympathetic to the Communist Party.

Throughout the 1920s and most of the 1930s, the CPGB decided to maintain the doctrine that a communist party should consist of revolutionary cadres and not be open to all applicants. The CPGB as the British section of the Communist International was committed to implementing the decisions of the higher body to which it was subordinate.

This proved to be a mixed blessing in the General Strike of 1926 immediately prior to which much of the central leadership of the CPGB was imprisoned. Twelve were charged with "seditious conspiracy". Five were jailed for a year and the others for six months. Another major problem for the party was its policy of abnegating its own role and calling upon the General Council of the Trades Union Congress to play a revolutionary role.

Nonetheless, during the strike itself and during the long drawn-out agony of the following Miners' Strike, the members of the CPGB were to the fore in defending the strike and in attempting to develop solidarity with the miners. The result was that membership of the party in mining areas increased greatly through 1926 and 1927. Many of these gains would be lost during the Third Period, but the influence was developed in certain areas that would continue until the party's demise decades later.

The CPGB did succeed in creating a layer of militants very committed to the party and its policies, although this support was concentrated in particular trades, specifically in heavy engineering, textiles and mining, and in addition, tended to be concentrated regionally too in the coalfields, certain industrial cities such as Glasgow and in Jewish East London. Indeed, Maerdy in the Rhondda Valley along with Chopwell in Tyne and Wear were two of a number of communities known as Little Moscow for their Communist tendencies.

During the 1920s, the CPGB clandestinely worked to train the future leaders of India's first communist party. Some of the key activists charged with this task, Philip Spratt and Ben Bradley, were later arrested and convicted as a part of the Meerut Conspiracy Case. Their trial helped to raise British public awareness of British colonialism in India, and caused massive public outrage over their treatment. At the same time, Asian and African delegates to the Comintern such as Ho Chi Minh, M. N. Roy, and Sen Katayama criticized the GBCP for neglecting colonial issues in India and Ireland.

But this support built during the party's first years was imperilled during the Third Period from 1929 to 1932, the Third Period being the so-called period of renewed revolutionary advance as it was dubbed by the (now Stalinised) leadership of the Comintern. The result of this "class against class" policy, adopted in late 1927, was that the Social Democratic and Labourite parties were seen as just as much a threat as the fascist parties and were therefore described as being social-fascist. Any kind of alliance with "social-fascists" was obviously to be prohibited.