Contemporary moral theology: Status questionis, ethics and hermeneutics in 1Jo 2,15-17 addresses the moral issues that plague humanity, from Socrates to contemporary human beings. It performs a philosophical study of the field named by some as ethics or as moral by others, in order to propose a reflection on moral theology and / or religious ethics. This dissertation begins with the state of the investigation, highlighting the philosophical foundation of all moral theology. A synthesis of the philosophical ethics follows, highlighting its horizons and the main contemporary ethical currents. It then engages on a historical view of the foundation of moral theology, from the Tridentine horizon to the post-Vatican II context, demonstrating that moral theology has always been in the wake of the events, and not before them, indicating the direction Christians can and should take. At this point, a study on the possible biblical substratum of moral theology is offered, exposing the essential points of the Pontifical Biblical Commission s Bible and Moral document. Finally, it identifies investigation trends for the understanding of morality in the biblical books, dwelling on the Catholic Letters, major elements John s first Letter. In particular, it accomplishes a specific analysis of the ethics in the hermeneutics of 1 John 2: 15-17 in order to be able to demonstrate that the role of Catholic moral theology today is to humanize the human being, reasserting that no other model is to be followed except for Jesus Christ.