Once the need to reform Catholic ethics became manifest with the Second Vatican Council, revision and adaptation of moral theology, the science that had served since the Council of Trent as official Catholic ethics, was often presented as the theological path to renewal. Scrutiny of philosophical, ethical, and theological presuppositions, however, discloses that the foundations of moral theology differ radically from those on which contemporary theological ethics must be based and that, accordingly, the way to true reform is not revision and adaptation of moral theology but the replacement of this self-contained science through construction of a fundamentally different kind of ethics, theological relational ethics as an essential, integral part of a reconstituted holistic theology.