As both
Action and the
electoral list of
United States of Europe — a joint list led primarily by
Italia Viva and
More Europe — failed to meet the electoral threshold at the
2024 European Parliament election in Italy, thus not electing any MEPs,
Luigi Marattin (Italia Viva) and
Enrico Costa (Action) published a letter on
Change.org advocating for the creation of a unitary party to represent liberal voters in Italy. They emphasized that the party's leadership should be fairly contestable and that the party's political stance should remain independent from both the
centre-right and the
centre-left. Following his party's defeat in the European election, Italia Viva's leader
Matteo Renzi announced that the "
Third Pole" instead be led by a third person; however, he later joined the centre-left coalition. Marattin condemned Renzi's statement, arguing that such a decision should be made by the party congress. In September, Marattin left Italia Viva and founded a political association called Liberal Horizons, with the goal of creating a roadmap for the establishment of a unitary liberal party, together with NOS, led by Alessandro Tommasi, and the
European Liberal Democrats, led by
Andrea Marcucci. A few days later, Costa left Action, after
Carlo Calenda formed an alliance with the centre-left and the
Five Stars Movement for the
2024 Ligurian regional election, and rejoined his former party of
Forza Italia. On 22 and 23 November, a convention in
Milan called "The Courage to Go", marked the birth of the Libdem Constituent (Assembly), composed by LDE, Liberal Horizons, NOS, the Liberal Forum, and the Reformist Ecologist Pact (PER). On 8 March 2025, the party was officially launched at a convention in Rome, where the party's name and logo were unveiled, and it was announced that the founding congress would be held in June. On 28 June, Marattin was elected by acclamation as the new secretary of the party, while Marcucci was appointed president. ==Founding members==