Alternatiba (English: Alternative) is a Basque socialist[2] political party. Founded in 2009, Alternatiba was born as a critical tendency within Ezker Anitza, the Izquierda Unida (IU) affiliate in the Basque Country, opposing a participation in the Basque government along with the PNV and Eusko Alkartasuna. In 2009 this tendency broke away from IU and formed an independent party.