[4][5] In July 2013 Sedda launched the PdS along with Paolo Maninchedda, a splinter from the Sardinian Action Party (PSd'Az).
At the party's first congress Sedda declared: "Let's start to think and act as a state and a nation, and self-determination will come, maybe not today, but much sooner than we think".
The PdS, which long sought an alliance with the centre-left led by the Democratic Party (PD),[6] was welcomed in the coalition, along with the Red Moors and Independence Republic of Sardinia (iRS).
[10] In late 2022 the party was basically replaced by "Sardinian Nation – Justice and Liberty" (reference to Giustizia e Libertà).
[12] The new party joined the regionalist coalition led by Renato Soru in the 2024 Sardinian regional election.