In 1966 an agreement with the Vatican, fostered in part by the death in 1960 of anti-communist archbishop of Zagreb Aloysius Stepinac and shifts in the church's approach to resisting communism originating in the Second Vatican Council, accorded new freedom to the Yugoslav Roman Catholic Church, particularly to catechize and open seminaries. The agreement also eased tensions, which had prevented the naming of new bishops in Yugoslavia since 1945. Tito's new socialism met opposition from traditional communists culminating in conspiracy headed by Aleksandar Ranković. In the same year Tito declared that Communists must henceforth chart Yugoslavia's course by the force of their arguments (implying an abandonment of Leninist orthodoxy and development of liberal Communism). The State Security Administration (UDBA) saw its power scaled back and its staff reduced to 5000.