During his term in France, Herrera was witness of the May 68 and, according Marín, his epistolary shows how he tenaciously opposed the so-called «Reform» that parallelly was carried out in Chile. That reform in his country was promoted by christian-democrat government of President Eduardo Frei Montalva (DC), whose party was involved in 1968 PUCV Rector Elections. This election had as candidates to Alberto Vial, near to Achitecture, and Raúl Allard Newmann (DC), the future winner. Despite his opposition to the reform, according to Alejandro Guzmán Brito in 2013 Roman Studies Week, he supported Vial through his collaboration with Oscar Godoy, with whom he met in Arica.