The Left in the European Parliament (The Left) is a left-wing political group of the European Parliament established in 1995. Prior to January 2021 it was named the European United Left/Nordic Green Left (French: Gauche unitaire européenne/Gauche verte nordique, GUE/NGL).
The group is mainly composed of democratic socialist parties, as well as some communist parties, the social democratic Greek Syriza and the populist Italian Five Star Movement.
Social democracy is a social, economic, and political philosophy within socialism that supports political and economic democracy and a gradualist, reformist, and democratic approach toward achieving social equality. In modern practice, social democracy has taken the form of democratic socialism, a robust welfare state, policies promoting social justice, market regulation, and a more equitable distribution of income.
Social democracy maintains a commitment to representative and participatory democracy. Common aims include curbing inequality, eliminating the oppression of underprivileged groups, eradicating poverty, and upholding universally accessible public services such as child care, education, elderly care, health care, and workers' compensation. Economically, it supports income redistribution and regulating the economy in the public interest.
Revolutionary socialism is a political philosophy, doctrine, and tradition within socialism that stresses the idea that a social revolution is necessary to bring about structural changes in society. More specifically, it is the view that revolution is a necessary precondition for transitioning from a capitalist to a socialist mode of production. Revolution is not necessarily defined as a violent insurrection; it is defined as a seizure of political power by mass movements of the working class so that the state is directly controlled or abolished by the working class as opposed to the capitalist class and its interests.
Revolutionary socialists believe such a state of affairs is a precondition for establishing socialism and orthodox Marxists believe it is inevitable but not predetermined. Revolutionary socialism encompasses multiple political and social movements that may define "revolution" differently from one another. These include movements based on orthodox Marxist theory such as De Leonism, impossibilism and Luxemburgism, as well as movements based on Leninism and the theory of vanguardist-led revolution such as the Stalinism, Maoism, Marxism–Leninism and Trotskyism. Revolutionary socialism also includes other Marxist, Marxist-inspired and non-Marxist movements such as those found in democratic socialism, revolutionary syndicalism, anarchism and social democracy.
The anti-Stalinist left encompasses various kinds of left-wing political movements that oppose Joseph Stalin, Stalinism, neo-Stalinism and the system of governance that Stalin implemented as leader of the Soviet Union between 1924 and 1953. This term also refers to those that opposed Joseph Stalin and his leadership from within the Communist movement, such as Leon Trotsky and the party's Left Opposition.
In recent years, the term may also refer to left and centre-left wing opposition to dictatorship, cult of personality, totalitarianism and police states, all being features commonly attributed to Marxist-Leninist regimes that took inspiration from Stalinism such as the regimes of Kim Il Sung, Enver Hoxha and others, including in the former Eastern Bloc. Some of the notable movements within the anti-Stalinist left have been Trotskyism and Titoism, anarchism and libertarian socialism, left communism and libertarian Marxism, the Right Opposition within the Communist movement, Eurocommunism, ultra-leftism, democratic socialism and social democracy.
The Fabian Society (/ˈfeɪbiən/) is a British socialist organisation whose purpose is to advance the principles of social democracy and democratic socialism via gradualist and reformist effort in democracies, rather than by revolutionary overthrow. It was historically related to some of the furthest left factions of radicalism, a left-wing liberal tradition.
As one of the founding organisations of the Labour Representation Committee in 1900, and as an important influence upon the Labour Party which grew from it, the Fabian Society has strongly influenced British politics. Members of the Fabian Society have included political leaders from other countries, such as Jawaharlal Nehru and Lee Kuan Yew, who adopted Fabian principles as part of their own political ideologies. The Fabian Society founded the London School of Economics in 1895.
The history of socialism has its origins in the Age of Enlightenment and the 1789 French Revolution, along with the changes that brought, although it has precedents in earlier movements and ideas. The Communist Manifesto was written by Karl Marx and Friedrich Engels in 1847-1848 just before the Revolutions of 1848 swept Europe, expressing what they termed scientific socialism. In the last third of the 19th century parties dedicated to democratic socialism arose in Europe, drawing mainly from Marxism. The Australian Labor Party was the first elected socialist party when it formed government in the Colony of Queensland for a week in 1899.
In the first half of the 20th century, the Soviet Union and the communist parties of the Third International around the world, came to represent socialism in terms of the Soviet model of economic development and the creation of centrally planned economies directed by a state that owns all the means of production, although other trends condemned what they saw as the lack of democracy. The establishment of the People's Republic of China in 1949, saw socialism introduced. China experienced land redistribution and the Anti-Rightist Movement, followed by the disastrous Great Leap Forward. In the UK, Herbert Morrison said that "socialism is what the Labour government does" whereas Aneurin Bevan argued socialism requires that the "main streams of economic activity are brought under public direction", with an economic plan and workers' democracy. Some argued that capitalism had been abolished. Socialist governments established the mixed economy with partial nationalisations and social welfare.
The Socialist Revolutionary Party (SR; Russian: Па́ртия социали́стов-революционе́ров, romanized: Pártiya sotsialístov-revolyutsionérov,, lit. 'Party of Socialists-Revolutionaries') was a major socialist political party in the late Russian Empire, during both phases of the Russian Revolution, and in early Soviet Russia. The party members were known as Esers (эсеры, esery, from "SRs").
The SRs were agrarian socialists and supporters of a democratic socialist Russian republic. The ideological heirs of the Narodniks, the SRs won a mass following among the Russian peasantry by endorsing the overthrow of the Tsar and the redistribution of land to the peasants. The SRs boycotted the elections to the First Duma following the Revolution of 1905 alongside the Russian Social Democratic Labour Party, but chose to run in the elections to the Second Duma and received the majority of the few seats allotted to the peasantry. Following the 1907 coup, the SRs boycotted all subsequent Dumas until the fall of the Tsar in the February Revolution of March 1917. Controversially, the party leadership endorsed the Russian Provisional Government and participated in multiple coalitions with liberal and social-democratic parties, while a radical faction within the SRs rejected the Provisional Government's authority in favor of the Congress of Soviets and began to drift towards the Bolsheviks. These divisions would ultimately result in the party splitting over the course of the fall of 1917, with the emergence of a separate Party of Left Socialist Revolutionaries. Meanwhile, Alexander Kerensky, one of the leaders of the February Revolution and the second and last head of the Provisional Government (July–November 1917) was a nominal member of the SR party but in practice acted independently of its decisions.
The Australian Labor Party (ALP), also known as the Labor Party or simply Labor, is the major centre-left political party in Australia and one of two major parties in Australian politics, along with the centre-right Liberal Party of Australia. The party has been in government since the 2022 federal election, and with political branches active in all the Australian states and territories, they currently hold government in New South Wales, South Australia, Victoria, Western Australia, and the Australian Capital Territory. As of 2025, Queensland, Tasmania and Northern Territory are the only states or territories where Labor currently forms the opposition. It is the oldest continuously operating political party in Australian history, having been established on 8 May 1901 at Parliament House, Melbourne, the meeting place of the first Federal Parliament.
The ALP is descended from the labour parties founded in the various Australian colonies by the emerging labour movement. Colonial Labour parties contested seats from 1891, and began contesting federal seats following Federation at the 1901 federal election. In 1904, the ALP briefly formed what is considered the world's first labour party government and the world's first democratic socialist or social democratic government at a national level. At the 1910 federal election, Labor became the first party in Australia to win a majority in either house of the Australian parliament. In every election since 1910 Labor has either served as the governing party or the opposition. There have been 13 Labor prime ministers and 10 periods of federal Labor governments, including under Billy Hughes from 1915 to 1916, James Scullin from 1929 to 1932, John Curtin from 1941 to 1945, Ben Chifley from 1945 to 1949, Gough Whitlam from 1972 to 1975, Bob Hawke from 1983 to 1991, Paul Keating from 1991 to 1996, Kevin Rudd from 2007 to 2010 and 2013, Julia Gillard from 2010 to 2013, and Anthony Albanese since 2022.
Socialist Party is the name of many different political parties around the world. All of these parties claim to uphold some form of socialism, though they may have very different interpretations of what "socialism" means. Statistically, most of these parties advocate either democratic socialism, social democracy or even Third Way as their ideological position. Many Socialist Parties have explicit connections to the labor movement and trade unions. A number of affiliates of the Trotskyist International Socialist Alternative also use the name "Socialist Party".
This list only includes parties that use the exact name "Socialist Party" for themselves, sometimes alongside the name of the country in which they operate. The list does not include political parties that use the word "Socialist" in addition to one or more other political adjectives in their names. For example, the numerous parties using the name "Socialist Workers' Party" are not included.