 He tried to reconstruct all the historical past of Spain, with a revisionist purpose that on several occasions placed him at the center of major controversies (for example, the one originated by his book "La ciencia española" ("The Spanish Science").For many critics he defined the boundaries of Spanish thought in works like "Historia de los heterodoxos españoles" ("History of the Heterodox Spaniards") and the "Historia de la estética española" ("History of Spanish Aesthetics").With respect to literary history, he wrote works such as "Las orígenes de la novela" ("Origins of the Novel"), "Antología de los poetas líricas" ("Anthology of Lyric Poets") (which finishes at the end of the Middle Ages), and the prologue to "Obras de Lope de Vega" ("Works of Lope de Vega"), among others.