Why, today, should we examine the contribution made by Christian communities to the moral formation of citizens? This article grasps the very essence of the problematic treated by the entire volume. Theology cannot escape reflection – an imperative in democratic societies – on the role played by intermediary human groups in the genesis of moral faculties. While some fear excesses of communitarism that may be encouraged by such questioning, others claim that the public arena does not provide sufficient structure to sustain citizens in the construction of their moral identity, in the face of competing heteroclite traditions. Following this line of research, collective practices likely to develop subjective moral faculties are explored in an interdisciplinary manner. For Christian communities, the challenge is to define under what conditions they can draw from their specific heritage, in order to initiate their members to truly universal ethics that do not confine them within the borders of their own religious tradition. The article concludes with a well-thought out summary of all the contributions in the book, exposing the progression of the problematic throughout its successive stages.