sentences:  Among his works it stands out the "New Argentine History, Costumbrist and Social View from the Conquest to Our Days" () and "History of the Argentine Presidents" ("Historia de los presidentes argentinos"), the latter covering from Bernardino Rivadavia's presidency to the third presidency of Juan Domingo Perón.His interpretation of the nation's history adheres to the liberal tradition, viewing the colonial period like an arid and unprogressive era, having in Bernardino Rivadavia his early nineteenth century hero, and viewing Juan Manuel de Rosas as a reactionary, defender of the colonial system who was useful for the British interests.He stepped into the historical playwright with "Mariano Moreno", a play that won the First National Prize of Literature 1957.