This article establishes relations between the construction of reality and a form of science fiction of political cut, in which the creation of possible worlds, real or not real. Knowing that science fiction is a way of exploring the human being through the question: "what would happen if", whit what imagining different futures and different presents. In order to establish the relationship between the elements proposed, fragments of works of science fiction of political cut are used, crossing concepts about the cancellation of universal truths, and taking advantage of aspects of relativism and constructionism. To conclude that Political Science Fiction works as a form of construction of reality