Rome Congress Palace: Central Committee of the Italian socialist party; the group that will then join under the acronym PSU (unitary socialist party) is detached

During this central Committee, the text of Nenni, aimed at safeguarding the unity of the party, is rejected by the majority that is recognized in the currents of Mancini, de Martino, Giolitti and Lombardi The new political formation, PSU, made up of social Democrats and unitary socialists, is joined by 28 deputies and 12 senators.