[EN] Here it ist presente a first translation into Spanish of the Kantian text named On radical eveil, treated this time as the original article once released in a Journal and in thos sense no taking place of the firts chapter included in Religion within the Limits of Reason Alone. The aim of this paper is to show -like when the moral argumento on God’s existence is displayed- that the virtuous atheist of which Kant speaks of is the moral héroe for his ethical formalism. Thus, religión has ist only purpose in better outlining the key concepts of Kantian ethical thought: freedom and moral responsability or accontability, real constituents od Kant’s ethical creed only relatable to a reflective faith[ES] Aquí se presenta la primera traducción ...