Mario Barros van Buren (1928–2004)[1] was a Chilean historian and lawyer.
He studied at the Colegio de los Sagrados Corazones in Santiago [es], to begin his law studies at the Pontifical Catholic University of Chile, from which he graduated in 1952 with a memoir on the theory of just war.
[citation needed] In 1979 he received the "Hispanic Culture" award from the Spanish State.
[citation needed] In 1984, during the Ronald Reagan administration, he was rejected as Chilean ambassador to the United States for having been editor of a magazine considered anti-Semitic from 1948 to 1952.
The next day, Foreign Minister Jaime del Valle Alliende [es] recognised that such a rejection did in fact take place, saying that what Julio had said was true, in the sense that Barros had not been "rejected either tacitly or explicitly.