High Quality Content by WIKIPEDIA articles! Xabier Arzalluz Antia (born 24 August 1932) is a Basque nationalist politician, who has been the leader of the Basque Nationalist Party for two decades, until 2004. He is a nationalist and a Christian Democrat. He was also the most powerful politician in Basque Country, and made all strategic decisions in the Basque Nationalist Party from 1986 onwards. Arzalluz was born in Azkoitia, Guipuzcoa. From a Carlist family, he studied in a Jesuit school in Durango. During the 1960s, he received degrees in Law and Philosophy at the University of Zaragoza. He spent some time in Frankfurt-am-Main preparing a thesis on German Christian Democracy and studying Theology.