Organic Centre-left

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Organic Centre-left
Centro-sinistra Organico
Leaders Amintore Fanfani,
Pietro Nenni,
Aldo Moro
Founded 1963 (1963)
Dissolved 1976 (1976)
Preceded by Centrism
Succeeded by Pentapartito
Headquarters Rome
Ideology Christian democracy(DC)
Democratic socialism(PSI)
Social democracy (PDSI)
Social liberalism(PRI)
Political position Centre to

The Organic Centre-left (Italian: Centro-sinistra Organico), was a coalition of four Italian political parties that formed governments throughout the 1960s and the middle 1970s.[1]


In 1962 the Christian Democracy (DC) leader Amintore Fanfani formed a cabinet with members of the Italian Social Democratic Party (PSDI) and the Italian Republican Party (PRI); it is considered the beginning of the Organic Centre-left. The Fanfani cabinet, even if it cannot be considered a traditional centre-left government, approved many social reforms, such as the nationalisation of industries like ENEL, which are considered left-leaning policies.

On 4 December 1963, Aldo Moro formed the first centre-left government with the support of the Italian Socialist Party (PSI). Prominent socialist politicians, such as Pietro Nenni and Antonio Giolitti, were appointed ministers.

In 1968 Moro resigned as Prime Minister and the new Premier, Giovanni Leone, formed a cabinet composed only of DC members.

After few years the Christian Democratic leader Mariano Rumor, proposed a new government coalition composed of centre-left parties. The Rumor cabinets approved the divorce law, a new Workers' Statute, the creation of the Antimafia Commission and a reform to give more powers and autonomy to the Regions.

The coalition still judged the Italian Communist Party and the Italian Social Movement as too extreme for participation in government. Internationally, the coalition relied on a strong pro-Europeanism and atlanticism from a pro-Arab policy, (Craxi and Andreotti). This fact caused many frictions between the Liberals and the Socialists, and was one of the causes of disintegration of the coalition. The coalition also adopted a pro-China policy, as it established foreign relations with the People's Republic of China in 1970.

The successor of the Organic Centre-left was the Pentapartito, a coalition between the four parties that formed the Centre-left coalition with the Italian Liberal Party.


The coalition programme was based on an extensive reformist agenda:


Party Main ideology Leader/s
Christian Democracy Christian democracy Amintore Fanfani, Aldo Moro
Italian Socialist Party Democratic socialism Pietro Nenni, Francesco De Martino
Italian Democratic Socialist Party Social democracy Giuseppe Saragat
Italian Republican Party Social liberalism Ugo La Malfa

Electoral results

Italian Parliament

Chamber of Deputies
Election year # of
overall votes
% of
overall vote
# of
overall seats won
+/– Prime Minister
1963 18,325,502 (#1) 59.6
386 / 630
Aldo Moro
1968 17,667,573 (#1) 55.6
366 / 630
Decrease 20
Mariano Rumor
1972 18,793,462 (#1) 56.3
371 / 630
Increase 5
Giulio Andreotti
Senate of the Republic
Election year # of
overall votes
% of
overall vote
# of
overall seats won
+/– Prime Minister
1963 15,834,690 (#1) 57.6
187 / 315
Aldo Moro
1968 15,949,408 (#1) 55.7
183 / 315
Decrease 4
Mariano Rumor
1972 17,223,486 (#1) 57.2
184 / 315
Increase 1
Giulio Andreotti


  1. ^ Cinquant’anni fa nasceva il centrosinistra poi arrivarono i ‘nani’ della politica
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