 Another figure that has contributed to the further refinement of the philosophy of philosophy, mostly through his students, is the Jesuit theologian Ignacio Ellacuría, born in 1930 in Viscaya, Spain. He was a student of Karl Rahner and Xavier Zubiri. He moved to El Salvador, to teach at the Universidad Centroamericana (UCA), where he became rector in 1969, a position he led until 1989 when he was assassinated by paramilitary forces trained by the United States military.