Union of Socialists

The Union of Socialists (Italian: Unione dei Socialisti, UdS) was a social-democratic political party in Italy. Its outlook was democratic socialist, reformist, anti-fascist, and part of the anti-Stalinist left. The party was founded in February 1948 by Ivan Matteo Lombardo, former secretary of the Italian Socialist Party.^[1] The UdS participated in the 1948 Italian general election as part of the Socialist Unity coalition with the Italian Socialist Workers' Party (Partito Socialista dei Lavoratori Italiani, PSLI), which collectively received 7.1% of the vote for the Chamber of Deputies and gained 33 seats. However, out of them only Lombardo and Piero Calamandrei were members of the UdS.^[2]

Lombardo was succeeded as the party's leader by Ignazio Silone in June 1949. In December 1949, the UdS was dissolved into the Unitary Socialist Party (Partito Socialista Unitario, PSU), which itself subsequently merged with the PSLI to form the Italian Democratic Socialist Party (Partito Socialista Democratico Italiano, PSDI) in 1951.

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Historical political parties in Italy

Communist

• Proletarian Unity Party (1972–1984)
• Italian Communist Party (1921–1991)
• Proletarian Democracy (1978–1991)
• Party of Italian Communists (1998–2014)

Democratic socialist

• Italian Revolutionary Socialist Party (1881–1893)
• Italian Workers' Party (1882–1892)
• Italian Socialist Party of Proletarian Unity (1964–1972)
• Democratic Party of the Left (1991–1998)
• Democratic Left (2007–2010)
• Left Ecology Freedom (2010-2016)

Social-democratic

• Italian Reformist Socialist Party (1912–1926)
• Unitary Socialist Party (1922–1930)
• Action Party (1929–1947)
• Unitary Socialist Party (1949–1951)
• Unified Socialist Party (1966–1969)
• Italian Socialist Party (1892–1994)
• Italian Democratic Socialist Party (1947–1998)
• Democrats of the Left (1998–2007)
• Italian Democratic Socialists (1998–2007)
• Article One (2017–2023)

Green

• Rainbow Greens (1989–1990)
• Federation of Green Lists (1986–1990)
• Federation of the Greens (1990–2021)

Radical and social-liberal

• Action Party (1853–1867)
• Italian Radical Party (1904–1922)
• Democratic Party (1913–1919)
• Constitutional Democratic Party (1913–1919)
• Italian Democratic Liberal Party (1919–1926)
• Social Democracy (1922–1926)
• Labour Democratic Party (1943–1948)
• Republican Democratic Concentration (1946)
• Radical Party (1955–1989)
• Democratic Alliance (1993–1997)
• The Network (1991–1999)

Centrist and liberal

• Liberal Union (1913–1922)
• Democratic Union for the Republic (1998–1999)
• Union for the Republic
• Italian Renewal (1996–2002)
• The Democrats (1999–2002)
• Segni Pact (1993–2003)
• Democracy is Freedom – The Daisy (2002–2007)
• Civic Choice (2013–2019)
• Liberal Popular Alliance (2015–2018)

Regionalist and federalist

• Movement for the Independence of Sicily (1943–1951)
• Federalists and Liberal Democrats (1994–1996)
• Federalist Italian League (1995–1996)
• Great South (2011–2013)

Christian-democratic

• Italian Catholic Electoral Union (1906–1919)
• Conservative Catholics (1913–1919)
• Italian People's Party (1919–1926)
• Christian Democracy (1943–1994)
• Italian People's Party (1994–2002)
• Christian Democrats for the Republic (1998)
• Christian Democratic Centre (1994–2002)
• United Christian Democrats (1995–2002)
• European Democracy (2001–2002)
• Christian Democracy for Autonomies (2005–2009)
• Union of Democrats for Europe (1999–2013)

Liberal-conservative

• Economic Party (1919–1924)
• National Democratic Alliance (1953–1954)
• Italian Liberal Party (1922–1994)
• Forza Italia (1994–2009)
• The People of Freedom (2009–2013)
• Future and Freedom (2010–2014)
• New Centre-Right (2013–2017)
• Conservatives and Reformists (2015–2017)
• Direction Italy (2017–2019)
• Cambiamo! (2019–2022)

National-conservative

• Common Man's Front (1946–1949)
• Monarchist National Party (1946–1959)
• People's Monarchist Party (1954–1959)
• Italian Democratic Party of Monarchist Unity (1959–1972)
• National Democracy (1977–1979)
• National Alliance (1995–2009)

Nationalist

• Italian Nationalist Association (1910–1923)
• Combatants' Party (1919–1923)
• National Fascist Party (1921–1943)
• Republican Fascist Party (1943–1945)
• Italian Social Movement (1946–1995)

• List of political parties in Italy
• 19th-century Italian political groups
• Early 20th-century Italian political parties
• 1950s–1990s Italian political parties
• Current Italian political parties