 Complete the following phrase:  Luna was born in Buenos Aires to a family originally from La Rioja Province in 1925. A grandfather had founded the La Rioja chapter of the newly established centrist Radical Civic Union UCR in 1892, and an uncle, Pelagio Luna, had been Vice President of Argentina for President Hipólito Yrigoyen, between 1916 and 1919. He enrolled at the University of Buenos Aires and earned a law degree in 1951. He was first published in 1954 with his biographical work Yrigoyen. Opposed, as most in the UCR were, to the populist President Juan Perón, Luna, after the 