On October 28th 1918, the Mayor, professor Enrico Presutti, resigns, a renounciation resulting from the split recorded in the majority on the public trasport question. Few days later, the news of the end of the First World War puts in second level the election of the new Major. The communal Council's convocation is postponed on November 12th.
The delay was provvidential for the majority coalition, taken up to find a solution to the inegilbility of Arturo Labriola, the candidate with widespread success. The knotty problem to solve was the incompatibility, sanctioned by law, between the position of parliamentarian and the commission of Mayor.
Degree in law, lawyer, economist, free teacher of political economy at the University, reporter, syndacalist, Arturo Labriola in 1890, only seventeen years old, organized for the fitst time in Naples a demostration of the May Day. Stood for the list of idipendent Socialists, he was elected at the second turn winning a seat in Parliament of Regno d'Italia; this politial goal runned the risk of losing the project of his election to Mayor of Naples.
On November 12th 1918 the assembly accepted Enrico Presutti and his Council's resignation. The strategy of the majority begins, first move: The assembly closed with the offer of Settimio Severo Caruso of renouncing the election of the Mayor and of going on with the election of members of the Council. It was elected a sole assessor, the Labriola.
Second move: in some Communes the tasks of Major were granted to a member of the Council, usually the older assessor, who had the commission of pro Mayor, but the Council was composed by a sole assessor. The voting didn't save suprises: Arturo Labriola was pro Major. He managed the Administration a year, up to the end of October in 1919
In the Mayor list of Naples from the unity of Italy till today, Arturo Labriola is the only one to have held office of pro Major of the city.