Political international in the context of "Progressive Alliance"

The International Workingmen's Association (IWA), commonly known as the First International, was a political international which aimed to unite a variety of left-wing political groups and trade union organizations based on the working class and class struggle. It was founded on 28 September 1864 at a workers' meeting in St Martin's Hall, London, and its first congress was held in 1866 in Geneva.

The IWA's history was characterized by internal conflicts between different socialist and anarchist factions. The initial ideological struggle was between the communists or Marxists, centred around Karl Marx on the General Council, and the mutualists or followers of Pierre-Joseph Proudhon. The communists successfully displaced the mutualists as the dominant ideological trend at the Brussels Congress in 1868. The rise of Mikhail Bakunin's collectivist anarchist faction in the late 1860s led to a more intense conflict over the role of the state and political action in achieving socialism. The organization reached its peak following the Paris Commune of 1871, which was celebrated and defended by the International in Marx's influential address, The Civil War in France. The bloody suppression of the Commune, however, led to a period of harsh government repression against the IWA.

The Socialist International (SI) is a political international consisting mostly of social democratic political parties and labour organisations. The SI was founded in support of democratic socialism, albeit it has generally moderated over time.

Although formed in 1951 as a successor to the Labour and Socialist International, it has antecedents in the late 19th century. The organisation currently includes 132 member parties and organisations from over 100 countries. Its members have governed in many countries, including most of Europe. In 2013, a schism in the SI led to the establishment of the Progressive Alliance.

The Communist International, abbreviated as Comintern and also known as the Third International, was a political international which existed from 1919 to 1943 and advocated world communism. Emerging from the collapse of the Second International during World War I, the Comintern was founded in March 1919 at a congress in Moscow convened by Vladimir Lenin and the Russian Communist Party (Bolsheviks) (RCP), which aimed to create a new international body committed to revolutionary socialism and the overthrow of capitalism worldwide.

Initially, the Comintern operated with the expectation of imminent proletarian revolutions in Europe, particularly Germany, which were seen as crucial for the survival and success of the Russian Revolution. Its early years were characterized by attempts to foment and coordinate revolutionary uprisings and the establishment of disciplined communist parties across the globe, often demanding strict adherence to the "Twenty-one Conditions" for admission. As these revolutionary hopes faded by the early 1920s, the Comintern's policies shifted, notably with the adoption of the "united workers' front" tactic, aiming to win over the working masses from reformist socialist parties. Throughout the 1920s, the Comintern underwent a process of "Bolshevisation", increasing the centralization of its structure and the dominance of the RCP within its ranks. This process intensified with the rise of Joseph Stalin in the Soviet Union.

The Socialist International, commonly known as the Second International, was a political international of socialist and labour parties formed in Paris on 14 July 1889. At a time of growing industrial working-class movements and the expansion of suffrage, it brought together autonomous national parties into a loose international federation. It continued the work of the First International (1864–1876), from which it inherited both the legacy of Karl Marx and the conflict with anarchists. The organization was dominated by the powerful Social Democratic Party of Germany (SPD), whose organizational and theoretical leadership heavily influenced the other member parties.

The International established the annual celebration of International Workers' Day on 1 May and popularised the demand for an eight-hour day. Its early congresses were preoccupied with expelling anarchists and defining its mission as one based on parliamentary political action. After 1900, the International was increasingly confronted with the internal divisions of the socialist movement, particularly the rise of revisionism in Germany and the debate over socialist participation in "bourgeois" governments, sparked by the Millerand affair in France. The 1904 Amsterdam Congress, which saw a major debate between French socialist Jean Jaurès and German leader August Bebel, condemned revisionism and ministerialism, marking the highest point in the influence of the International.

The International Democracy Union (IDU; known as the International Democrat Union until September 2023) is an international alliance of centre-right to right-wing political parties. Headquartered in Munich, Germany, the IDU consists of 84 full and associate members from 65 countries. It is chaired by Stephen Harper, former prime minister of Canada. It has three affiliated international organizations (International Young Democrat Union, International Women's Democracy Union and SME Global) and six affiliated regional organizations (Union of Latin American Parties, Asia Pacific Democrat Union, Caribbean Democrat Union, Democrat Union of Africa, European People's Party and European Conservatives and Reformists Party).

The IDU allows "centre-right" conservative political parties around the world to establish contacts and discuss different views on public policy and related matters. Their stated goal is the promotion of "democracy and [of] centre-right policies around the globe". The IDU has some overlap of member parties with the Centrist Democrat International (CDI), but the CDI is more centrist, Christian democrat and communitarian than the IDU.

Marxism–Leninism–Maoism (MLM) is a term used by some communist groups to emphasize the significance of Maoism as a new stage in Marxist theory and practice. Adherents of Marxism–Leninism–Maoism claim it to be a unified, coherent higher stage of Marxism. The term is sometimes used interchangeably with "Maoism" and "Marxism–Leninism" by adherents, although the latter term is more associated with Stalinism.

Marxism-Leninism-Maoism has been espoused by a number of insurgent groups in the global periphery, including the Unified Communist Party of Nepal (Maoist) (which entered government in 2006), the Communist Party of India (Maoist), and the Communist Party of the Philippines. In developed countries (the "imperial core"), MLM has been promoted by the Revolutionary Communist Party, USA (RCP) in the 1990s, and more recently by smaller groups such as the American Red Guards and Norway's Tjen Folket (Serve the People). In the 1990s the Revolutionary Internationalist Movement (dominated by the RCP) served as an international coalition of MLM groups. More recently the International Communist League has served this function.