The Integration of Knowledge explores a theory of human knowledge through a model of rationality combined with some fundamental logical, mathematical, physical and neuroscientific considerations. Its ultimate goal is to present a philosophical system of integrated knowledge, in which the different domains of human understanding are unified by common conceptual structures, such that traditional metaphysical and epistemological questions may be addressed in light of these categories. Philosophy thus becomes a synthesizer of human knowledge, through the imaginative construction of categories and questions that may reproduce and even expand the conceptual chain followed by nature and thought, in an effort to organize the results of the different branches of knowledge by inserting them in a broader framework.