 Medieval theories of moral reasoning have their origins in the moral theology of St. Augustine and the rational ethics of Aristotle. Until the thirteenth century Augustine’s responses to questions concerning free will, predestination, the nature of goodness, and divine freedom dominated moral speculation in the Latin West. For Augustine morality demands the human will’s conformity to the prescriptions of the immutable, necessary and eternal law. Augustine argues in his work on free will that the eternal law “is called supreme reason, which must always be obeyed, and through it the evil deserve an unhappy life and the good a blessed life; and through this law we have derived temporal laws rightly constructed and correctly emended.” The ideals of eternal law are universally imprinted upon human intellects and are the immutable standards by which human actions may be judged.