Proclus of Athens, who ran the Academy for decades in the fifth century AD, represents the last great figure of Greek pagan philosophy. His extensive work, which has survived in large part, has aroused, especially in recent times, the interest and work of historians for its systematic nature and the enormous influence it exerted in medieval, Renaissance and modern philosophy. The German idealists read it assiduously and widely recognized its depth. The present edition has been conceived to remedy to some extent the little attention given in our language to the thought of who obtained the definitive version of a philosophy of as much historical relevance as Neoplatonism. To this end, a new translation of the Elements of Theology is offered, a work of great impact in the later philosophy of containing an original version of ancient metaphysics (in the form of definitions and deductions in imitation of the Elements of Euclid, an expository procedure that later Would adopt Spinoza in his Ethics). At the same time, in order that the reader may observe the application of Proclus's philosophical principles in such important and ever-debated ethical questions as freedom, responsibility, divine providence, and the existence of evil in the world, Offers for the first time in Spanish the translation of the Three pamphlets.