The roots of the Ustaše ideology were in the Croatian nationalism of the nineteenth century. The Ustaše ideological system was chiefly based on the traditional pure Croatian nationalism of Ante Starčević. About it, W. Safran wroteBut another vision of Croatian identity that was closely tied to the Catholic Church and the Vatican and was led by an ex-seminarist Ante Starcevic became the ideological precursor to the Ustase. Starcevic and his followers emphasized the high achievements of Western Catholic, Croatian culture, while Serbian culture was depicted as oriental and inferior. Starčević's racism was further fully elaborated by Ustaša Ivo Pilar [under the pseudonym L. von Südland]. His book was translated into Croatian in 1943, by Pavelić's regime, as one of the tenets of his Ustaše and his Independent State of Croatia. At the same time, the Ustaše borrowed from traditional Croatian nationalism, the National-Socialism of Hitler, the fascism of Mussolini, and even from the program of the Croatian Peasant Party. The Ustaše aimed at an ethnically "pure" Croatia, and saw the Serbs that lived in Croatia and Bosnia and Herzegovina as their biggest obstacle. Along that line, Ustaše ministers Mile Budak, Mirko Puk, and Milovan Žanić declared in May 1941 that the goal of the new Ustaše policy was an ethnically clean Croatia. They also publicly announced the strategy (on July 22, 1941 ) to achieve their goal, which resembled the bloodiest religious wars: "A third must become Catholic, a third must leave the country, and a third must die!"