Socialism in Iran, also called Iranian socialism, is a political ideology that has shaped Iranian politics since the early 20th century. The socialist tradition in Iran emerged during the Constitutional Revolution of 1905–1911, when Iranian intellectuals and workers came into contact with European and Russian radical thought, and it developed through a succession of parties, movements, and revolutionary organisations over the following decades.

The earliest socialist organisations in Iran were founded by Iranian emigrants in Transcaucasia who maintained close ties with the Russian Social Democratic Labour Party. During the constitutional era, several competing socialist and social-democratic parties competed in the nascent Iranian parliament. After the First World War and the Bolshevik Revolution, a more explicitly communist current emerged, culminating in the short-lived Gilan Soviet Republic (1920–1921) and the formation of the Communist Party of Iran. Under Reza Shah's authoritarian rule in the 1920s–1940s, independent political parties were suppressed, and organised socialist activity was largely driven underground or abroad.

Following Reza Shah's forced abdication in 1941, a new era of political pluralism briefly flourished. The Tudeh Party of Iran, founded in 1941, became the largest communist organisation in the country and at its height commanded significant popular support. At the same time, a broader nationalist-socialist current coalesced around Mohammad Mosaddegh and the National Front, which led the successful campaign to nationalise the Iranian oil industry and briefly governed Iran between 1951 and 1953. The 1953 Iranian coup d'état, engineered with British and American support, toppled Mosaddegh and inaugurated a period of renewed repression that scattered the Iranian left.

In the 1960s and 1970s, a new generation of socialist activists rejected both the Tudeh Party's alignment with the Soviet Union and the National Front's parliamentary approach, turning instead to Marxist-Leninist guerrilla strategy. The principal organisation of this tendency was the Organization of Iranian People's Fedai Guerrillas, founded in 1963. Although many on the left initially supported the Iranian Revolution of 1979, the new Islamic Republic quickly moved against socialist and communist groups, executing hundreds of activists in the early 1980s and forcing the surviving organisations into exile. Since then, Iranian socialist parties have continued to operate primarily from abroad, advocating for a secular democratic republic.

History

Constitutional era and early socialist movements (1905–1921)

Socialist ideas first entered Iran through the networks of Iranian workers and intellectuals in Tsarist Transcaucasia, particularly in Baku, who were in close contact with Russian and Azerbaijani social democrats. The Social Democratic Party, established around 1904–1905, was Iran's first socialist organisation and maintained close links with the Russian Social Democratic Labour Party. It combined European socialist principles with nationalist and liberal ideas, and played a significant role in the Constitutional Revolution of 1905–1911 by mobilising popular support for a constitutional monarchy and the curtailment of royal and clerical power.

During the constitutional era, Iran's new parliament (the Majlis) saw the formation of several competing parties with varying degrees of socialist orientation. The Democrat Party, founded in 1909, was the more radical of the two main parliamentary groupings, advocating the separation of religion and state and drawing its membership largely from middle-class intellectuals with connections to the Baku-based Social Democratic Party. Its rival, the Moderate Socialists Party, represented a more conservative and clerical-influenced current. Other organisations from this period included the Unified Socialist Party, the Union and Progress Party, and the Socialist Revolutionary Party, the last of which was based in Baku and was among the most significant organisations founded by Iranian emigrants in Transcaucasia.

The Bolshevik Revolution of 1917 profoundly influenced the Iranian left. The Justice Party, founded in 1917 by former members of the Social Democratic Party, aligned itself with the Bolsheviks and participated in the Communist International, renaming itself the Communist Party of Iran in 1920. That same year, a short-lived Soviet Republic was proclaimed in Gilan under the Jangali movement leader Mirza Kuchik Khan, with communist support. The experiment ended in defeat in 1921, and the Young Communist League of Persia, which had been active in the Gilan uprising, was subsequently suppressed.

The Reza Shah era and the suppression of the left (1921–1941)

Following Reza Khan's rise to power—first as prime minister and then as shah in 1925—Iran's nascent socialist and labour movements were systematically dismantled. The Socialist Party, which had been one of four political groups courted by Reza Khan as he consolidated power, refused to endorse his claim to the throne on republican grounds. In the years following his coronation, the party was dissolved, its leaders forced into retirement, and its offices and affiliated institutions attacked by mobs organised with government support. Most other independent political parties, socialist or otherwise, met a similar fate. In 1937, a group of 53 intellectuals and activists—including several who would later help found the Tudeh Party—were imprisoned on charges of communist conspiracy, illustrating the Shah's thoroughgoing repression of the left.

The Mosaddegh era and the crisis of 1953 (1941–1953)

The abdication of Reza Shah in 1941, under Allied pressure during the Second World War, opened a new period of political competition. The Tudeh Party of Iran was founded the same year by former members of the "Group of 53" and quickly became Iran's most significant left-wing force, attracting trade unionists, intellectuals, and professionals. At its height, the Tudeh Party commanded the largest trade union federation in Iranian history and had significant influence in the press, universities, and the military officer corps—though it never achieved governmental power.

Alongside the Tudeh Party, a broader coalition of nationalist, liberal, and socialist forces coalesced in the National Front, formed in 1949 around Mohammad Mosaddegh. The National Front's central demand was the nationalisation of the Anglo-Iranian Oil Company, which it achieved after Mosaddegh became prime minister in 1951. The backbone of the National Front was the Iran Party, founded in 1941 by European-educated technocrats who modelled their socialism on the moderate French Socialist Party and the Fabian Society rather than on Marxist doctrine. Other founding members of the National Front included the Movement of God-Worshipping Socialists, which sought to synthesise Shi'a Islam and socialist ideals, and various nationalist groupings.

The 1953 Iranian coup d'état, carried out with CIA and MI6 involvement, overthrew Mosaddegh in August 1953 and restored full power to Mohammad Reza Shah. The Tudeh Party was outlawed, thousands of its members arrested, and many executed or tortured. The Iran Party and other National Front organisations were suppressed. The coup effectively ended the first phase of mass socialist politics in Iran and inaugurated nearly two decades of authoritarian rule in which organised left activity was impossible inside the country.

Guerrilla socialism and the Islamic Revolution (1963–1979)

The failure of parliamentary and mass-movement strategies led a new generation of Iranian leftists in the 1960s and 1970s to embrace guerrilla warfare as the path to revolution. Inspired by the writings of Mao Zedong, Che Guevara, and Régis Debray, and by homegrown theorists such as Bijan Jazani, the Organization of Iranian People's Fedai Guerrillas (OIPFG), founded in 1963, became the principal expression of this tendency. The OIPFG carried out armed operations against the Shah's regime and was severely repressed by SAVAK, the secret police. Parallel organisations included the Marxist splinter Peykar (founded 1975), which broke from the People's Mujahedin of Iran to adopt secular Marxism-Leninism.

The Islamic Revolution of 1979 was a contradictory moment for the Iranian left. Most socialist and communist organisations initially supported the revolution, seeing it as an anti-imperialist uprising against the Shah and his American backers. The Tudeh Party and the OIPFG's majority faction aligned themselves with Ruhollah Khomeini in the revolution's early years. However, the Islamic Republic moved to consolidate a theocratic order and, particularly after the rupture with the left in 1981–1983, launched a wave of executions and imprisonments that effectively destroyed the organised socialist movement inside Iran. The 1988 executions of Iranian political prisoners killed thousands of left-wing detainees.

After the revolution (1979–present)

Following the mass repression of the early 1980s, the Iranian socialist movement has existed primarily in exile. The Organization of Iranian People's Fedaian (Majority) was considered the largest communist organisation in Iran from 1980 to 1991 but has since operated in exile, advocating for a secular Iranian republic. The Communist Party of Iran, formed in 1983 from a merger of Marxist–Leninist and Kurdish leftist organisations, remains active particularly among Iranian Kurds. Various splinter groups and factions have continued to operate abroad, often divided over questions of strategy and ideology, including assessments of the 1979 revolution.

Political parties and organisations

Organisations founded before 1979

Social Democratic Party

The Social Democratic Party was established in 1904 or 1905 by Iranian emigrants in Transcaucasia, with assistance from local revolutionaries. The party maintained close ties with the Russian Social Democratic Labour Party and the Hemmat Party. It was the first socialist organization in Iran. The party developed a unique blend of European socialism and indigenous ideas, while also advocating liberalism and nationalism. Although critical of the conservative ulama, it retained some religious beliefs and supported the separation of church and state. The party was founded by Haydar Khan Amo-oghli and led by Nariman Narimanov.

Unified Socialist Party and Social Reformers Party

During the constitutional era, the Unified Socialist Party and the Social Reformers Party were socialist political parties in Qajar Iran. The Social Reformers Party was considered more moderate compared to the economic platforms of the Democrat Party and the Social Democratic Party, although it similarly opposed the landlords.

Union and Progress Party

The Union and Progress Party was a political party during the constitutional era of Qajar Iran. In the 1909 Persian legislative election, the party won four seats and allied with the Moderate Socialists Party against the Democrat Party.

Democrat Party

The Democrat Party, founded in 1909 during the constitutional era of Qajar Iran, was one of two major parliamentary parties at the time, alongside its rival, the Moderate Socialists Party. The party followed a social democrat ideology and was initially an offshoot of the Transcaucasia-based Social Democratic Party. However, it severed direct ties with Baku and removed "Socialist" from its name to appeal to the conservative public, although its ideology remained heavily influenced by the original party. The party was largely composed of middle-class intellectuals and advocated for the separation of church and state.

In 1918, the party split into two factions: the Pro-Reorganization Democrats, led by Bahar, and the Anti-Reorganization Democrats. Notable members included Hassan Taqizadeh and Haydar Khan Amo-oghli.

Socialist Revolutionary Party