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| 1963, May 16 |
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| The Fanfani cabinet resigned following the results of parliamentary elections (April 28) in which the Christian Democrats lost 13 seats and the Communists gained 25. | 1 |
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| 1964, Jan. 11 |
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| The left wing of the Socialist Party, representing about 40 percent of the membership, announced that it would form a new group, the Italian Socialist Party of Proletarian Unity. | 2 |
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| 1964–68 |
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| A period of political instability and social unrest. The Center-Left cabinets, of which Aldo Moro headed three in this period, were unable to attack and solve major problems, because of conservative opposition even within Moro's dominant Christian Democratic Party and because of continuing dissension in socialist ranks. | 3 |
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| 1968, May |
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| Following significant losses in the elections, the Socialists refused to participate further in the Center-Left alliance. | 4 |
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| June 5 |
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| Resignation of the Moro cabinet following withdrawal of the Socialists. | 5 |
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| June–Nov |
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| Giovanni Leone headed an interim minority Christian Democratic cabinet. | 6 |
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| Dec. 13 |
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| Mariano Rumor (Christian Democrat) managed to reconstruct the Center-Left combination and formed a cabinet with a program of sweeping reforms. It seemed impossible, however, to attain political stability. Despite growing unrest in student and worker circles, the government fell (July 5, 1969) following a split in the Socialist Party and desertion of the cabinet by the Socialist ministers. | 7 |
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