[3] After the liberation of Florence Pieraccini was made the councilor of the first democratic administration and worked as the director of a socialist weekly entitled La defense.

[3] He was part of the group which assumed the leadership of the Italian Socialist Party and director of the newspaper Avanti!

[3] In the late 1960s Pieraccini was part of the right-wing group in the party together with Pietro Nenni and Mario Zagari.

[3] He was appointed minister of merchant navy to the cabinet led by Mariano Rumor in 1973 and was in office until 14 March 1974.

[3] Then Pieraccini was named the minister for the coordination of scientific and technological research initiatives on 14 March 1974 to the next cabinet of Mariano Rumor which he held until November that year.