This paper addresses the problem of evil from the perspective of St. Thomas Aquinas. It argues that, for Aquinas, the nature of moral evil is in the individual who, due to a disordered reason, departs from the pursuit of the good that is inherent to being. Synderesis is the only indissoluble bridge that man has with natural law and even with the eternal. Will converted into noluntas guides man intrinsically to evil acts, but synderesis, as a power with a natural habit, is the best guide for the contingent decision-making under the rubric of the first practical principles from the transcendent.
Natural law, the Ninth Amendment and American judicial decision-making
