Aralar was born in the 1990s from a critical tendency within Herri Batasuna and Euskal Herritarrok, led by Patxi Zabaleta. The tendency had its main base in Navarre. The breaking of ETA's truce in 2000 provoked Herri Batasuna's reformation into Batasuna, to have presence in all Euskal Herria. Following disagreements over the internal organization of Batasuna, Aralar broke away to form a separate political party. In 2004 the youth wing of Aralar, Iratzarri, was founded. In the May 2003 election for the Navarre Assembly, Aralar obtained 24,068 votes and four seats and in the same community obtained 4.76% of the valid votes in the municipal elections and 18 local councillors. In the Basque Autonomous Community it obtained 30 councillors and 1.51% of the valid votes. Aralar contested the Spanish general election, 2004 in the Basque Autonomous Community in coalition with Zutik but failed to win any seats, polling 3.09% of the valid votes. The party contested in Navarre as part of the coalition Nafarroa Bai, together with Eusko Alkartasuna, Batzarre, the Basque Nationalist Party and independents, obtaining a seat for the independent Uxue Barkos and 18.04% of the whole of valid votes, which was the highest percentage and number of votes for a Basque nationalist list in Spanish General Elections in Navarre. In the 2005 Basque elections, Aralar entered the Basque Parliament with one seat and 2.33% of the votes. This seat was held by Aintzane Ezenarro. In 2007 it won 4 local Assembly seats and 130 local council seats in the Basque Autonomous Community, in coalition with Ezker Batua, and 5 local Assembly seats and 30 council seats in Navarre, within Navarre Yes. Aralar contested the 2008 General Elections in the Basque Autonomous Community polling 2.67% of the total votes, 0.42% less than Aralar-Zutik coalition's result four years ago. In Navarre the party kept the Nafarroa Bai coalition, which obtained the 18.53% and one seat, still held by Barkos. In the 2009 Basque elections, Aralar increased its presence in the Basque Parliament with four seats and 6.04% of votes. The head of the parliamentary group is still Aintzane Ezenarro. In 2 December 2017, Aralar dissolved itself.
