A distinguished Catholic moral theologian outlines in a systematic way the changes that have occurred in his understanding of Catholic moral theology during the last fifteen years. This historical developmental essay touches on various concrete issues while reviewing the contexts which influenced them and the stance with which they were addressed. Ethical models and methodologies are reviewed and official Church teaching discussed. While the changes of the last fifteen years are seen as enormous, it is maintained that they are in continuity with the best of the Roman Catholic theological tradition.