It is a clear story and exposed with rigor and simplicity, where an excellent argumentative line stands out, very weighted in the interpretation of the authors, without being carried away by partisanship, but giving relevance to the currents that have exerted greater influence in the (In this case, to point out the attention given to authors such as Juan Escoto Erígena and Juan Duns Escoto, located in the work alongside Thomas Aquinas, an unusual thing, given the traditional neotomist orientation of the manuals to the use in This discipline).