[3] Since 1877, the Radical Party was active as a loose parliamentary group grown out from the Historical Far Left.

Later on, they lost votes to the Socialists in Emilia and to the Republicans in Romagna but strengthened their position in Veneto, notably holding for almost twenty years the single-seat constituencies of Venice and Padua, which had also Radical mayors, and southern Italy, where they were previously virtually non-existent.

[4] In the 1913 Italian general election, the Radicals obtained their best result with 10.4% of the vote and 62 seats in the Chamber of Deputies.

[5][6] In the 1919 Italian general election, the Radicals filed joint candidates with the Liberals in 54% of the constituencies.

[4] After World War II, some former Radicals led by Nitti joined the National Democratic Union, along with the Italian Liberal Party and other elements of the political bloc that governed Italy from the years of Giolitti until the rise of Benito Mussolini's Italian fascist regime.