Christian Democracy (Italy) in the context of "Alcide De Gasperi"

The history of the Italian Republic concerns the events relating to the history of Italy that have occurred since 1946, when Italy became a republic after the 1946 Italian institutional referendum. The Italian republican history is generally divided into two phases, the First and Second Republic.

After the fall of the Fascist regime in Italy and the end of World War II, Italian politics and society were dominated by Christian Democracy (DC), a broad-based Christian political party, from 1946 to 1994. From the late 1940s until 1991, the opposition was led by the Italian Communist Party (PCI). Christian Democracy governed uninterrupted during this period, dominating every cabinet and providing nearly every prime minister. It governed primarily with the support of an array of minor parties from the centre-left to the centre-right, including the Italian Socialist Party (PSI), Italian Democratic Socialist Party (PSDI), Italian Republican Party (PRI), and Italian Liberal Party (PLI), and even far-right parties like the Italian Social Movement (MSI). The Communist Party was excluded entirely from government, with the partial exception of the short-lived Historic Compromise, in which the PCI provided external support to a DC minority government from 1976 to 1979.

Oscar Luigi Scalfaro (Italian: [ˈɔskar luˈiːdʒi ˈskalfaro]; 9 September 1918 – 29 January 2012) was an Italian politician who served as President of Italy from 1992 to 1999. A member of Christian Democracy (DC), he became an independent politician after the DC's dissolution in 1992, and was close to the centre-left Democratic Party when it was founded in 2007. Before his election to the Presidency, he was a member of the Chamber of Deputies for Turin for 44 years from 1948 to 1992.

The Italian Socialist Party (Italian: Partito Socialista Italiano, PSI) was a social democratic and democratic socialist political party in Italy, whose history stretched for longer than a century, making it one of the longest-living parties of the country. Founded in Genoa in 1892, the PSI was from the beginning a big tent of Italy's political left and socialism, ranging from the revolutionary socialism of Andrea Costa to the Marxist-inspired reformist socialism of Filippo Turati and the anarchism of Anna Kuliscioff. Under Turati's leadership, the party was a frequent ally of the Italian Republican Party and the Italian Radical Party at the parliamentary level, while lately entering in dialogue with the remnants of the Historical Left and the Liberal Union during Giovanni Giolitti's governments to ensure representation for the labour movement and the working class. In the 1900s and 1910s, the PSI achieved significant electoral success, becoming Italy's first party in 1919 and during the country's Biennio Rosso in 1921, when it was victim of violent paramilitary activities from the far right, and was not able to move the country in the revolutionary direction it wanted.

A split with what became known as the Communist Party of Italy and the rise to power of former party member and Italian fascist leader Benito Mussolini, who was expelled from the party, class struggle and internationalism in favour of corporatism and ultranationalism, and his National Fascist Party led to the PSI's collapse in the controversial 1924 Italian general election and eventual ban in 1925. This led the party and its remaining leaders to the underground or in exile. The PSI dominated the Italian left until after World War II, when it was eclipsed in status by the Italian Communist Party (PCI). The two parties formed an alliance lasting until 1956 and governed together at the local level, particularly in some big cities and the so-called red regions until the 1990s. The PSI suffered the right-wing split of the Italian Democratic Socialist Party, whose members opposed the alliance with the PCI and favoured joining the Centrism coalition, in 1947 and the left-wing split of the Italian Socialist Party of Proletarian Unity, whose members wanted to continue the cooperation with the PCI, in 1964. Starting from the 1960s, the PSI frequently participated in coalition governments led by Christian Democracy, from the Organic centre-left to the Pentapartito in the 1980s.

The Italian Democratic Socialist Party (Italian: Partito Socialista Democratico Italiano, PSDI), also known as Italian Social Democratic Party, was a social-democratic political party in Italy. The longest serving partner in government for Christian Democracy, the PSDI was an important force in Italian politics, before the 1990s decline in votes and members. The party's founder and longstanding leader was Giuseppe Saragat, who served as President of the Italian Republic from 1964 to 1971. Compared to the like-minded Italian Socialist Party, it was more centrist, at least until Bettino Craxi's leadership, in fact, it identified with the centre-left.

After a rightward shift in the 1990s, which led some observers to question the PSDI as a social democratic party, it was expelled from the European Socialist Party. When Enrico Ferri founded with Luigi Preti the current European Liberal Social Democracy (SOLE), which was in favour of an alliance with Silvio Berlusconi's centre-right coalition, the choice was stigmatized by the PES and the Socialist International, and an official statement was issued. In January 1995, the party congress put the current of Ferri and Preti in the minority and elected Gian Franco Schietroma as secretary. After the party was disbanded in 1998, the majority went to the Socialist Party of the centre-left coalition, while the party's right-wing current joined centre-right coalition parties. In 2004, the party was established with the same name, Italian Democratic Socialist Party, which remains a minor party associated with both centre-left and centre-right coalitions.

The Italian Republican Party (Italian: Partito Repubblicano Italiano, PRI) is a political party in Italy established in 1895, which makes it the oldest political party still active in the country. The PRI identifies with 19th-century classical radicalism, as well as Mazzinianism, and its modern incarnation is associated with liberalism, social liberalism, and centrism. The PRI has old roots and a long history that began with a left-wing position, being the heir of the Historical Far Left and claiming descent from the political thought of Giuseppe Mazzini and Giuseppe Garibaldi. With the rise of the Italian Communist Party and the Italian Socialist Party (PSI) to its left, it was associated with centre-left politics. The early PRI was also known for its anti-clerical, anti-monarchist, republican, and later anti-fascist stances. While maintaining those traits, during the second half of the 20th century the party moved towards the centre on the left–right political spectrum, becoming increasingly economically liberal.

After 1949, the PRI was a member of the pro-NATO alliance formed by Christian Democracy (DC), the Italian Democratic Socialist Party, and the Italian Liberal Party (PLI), enabling it to participate in most governments of the 1950s, a period later known as Centrism. In 1963, the party helped bring together DC and PSI in Italy's first centre-left government, the Organic centre-left. Although small in terms of voter support, the PRI was influential thanks to leaders like Eugenio Chiesa, Giovanni Conti, Cipriano Facchinetti, Randolfo Pacciardi, Oronzo Reale, Ugo La Malfa, Bruno Visentini, Oddo Biasini and Giovanni Spadolini. The latter served as Prime Minister of Italy in 1981–1982, the first non Christian Democrat since 1945. From 1976 to 2010, the PRI was a member of the European Liberal Democrat and Reform Party (ELDR), along with the PLI, and the two parties usually ran together in European Parliament elections. After joining the centrist Segni Pact in 1994, the PRI was part of the centre-left coalition from 1996 to 2006, and then of the centre-right coalition from 2008 to 2013 (its leader Giorgio La Malfa was Minister for European Affairs from 2005 to 2006). Afterwards, it ran alone until joining the centrist Action – Italia Viva in 2022.

The Italian Social Movement (Italian: Movimento Sociale Italiano, MSI) was a neo-fascist political party in Italy. A far-right party, it presented itself until the 1990s as the defender of Italian fascism's legacy, and later moved towards national conservatism. In 1972, the Italian Democratic Party of Monarchist Unity was merged into the MSI and the party's official name was changed to Italian Social Movement – National Right (Italian: Movimento Sociale Italiano – Destra Nazionale, MSI–DN).

Formed in 1946 by supporters of the former dictator Benito Mussolini, most of whom took part in the experience of the Italian Social Republic and the Republican Fascist Party, the MSI became the fourth largest party in Italy by the early 1960s. The party gave informal local and eventually national support to the Christian Democracy party from the late 1940s and through the 1950s, sharing anti-communism. In the early 1960s, the party was pushed to the sidelines of Italian politics, and only gradually started to gain some political recognition in the 1980s. There was internal competition between the party's moderate and radical factions. The radicals led the party in its formative years under Giorgio Almirante, while the moderates gained control in the 1950s and 1960s. Almirante's return as leader in 1969 was characterised by a big tent strategy.

The Historic Compromise (Italian: Compromesso storico), also known as the Third Phase (Italian: Terza Fase) or the Democratic Alternative (Italian: Alternativa Democratica), was a historical political accommodation between Christian Democracy (DC) and the Italian Communist Party (PCI) in the 1970s.

The Democratic Party (Italian: Partito Democratico, PD) is a social democratic political party in Italy. The party's secretary is Elly Schlein, elected in the 2023 leadership election, while the party's president is Stefano Bonaccini.

The PD was established in 2007 upon the merger of various centre-left parties which had been part of The Olive Tree list in the 2006 Italian general election, mainly the social democratic Democrats of the Left (DS), successor of the Italian Communist Party and the Democratic Party of the Left, which was folded with several social democratic parties (Labour Federation and Social Christians, among others) in 1998, as well as the largely Catholic-inspired Democracy is Freedom – The Daisy (DL), a merger of the Italian People's Party (heir of the Christian Democracy party's left wing), The Democrats and Italian Renewal in 2002. While the party has also been influenced by Christian left, social liberalism and Third Way, especially under Matteo Renzi's leadership, the PD moved closer to social liberalism. Under latter leaders, especially Schlein, whose upbringing is influenced by the left-wing, environmentalism and green politics, the party has moved to the left.