Nowadays there is the compelling need of a dialogue among us considered as structures, people, institutions, religions, to agree what kind of world we want to create and what we are going to do to live all of us in the same planet. What does theology have to say about it? What does theology have to tell to itself to make a dialogue feasible? This article studies the theology challenges about this project (a dialogue with contemporary rationalities and with other religions) as well as the assumptions it may have on its basis to participate in the dialogue (theology as pedagogy and communication problem).