Used by Nietzsche in many moments of his work, the expression great politics reveals a perspective on problems of political nature radically different from the modernity theorical political critique. The aim of this work is to justify an analysis of the great politics, from four complementary hypotheses. First of all, we assume that the great politics must strictly be analyzed inside nietzschean`s thought, and not from any values related to philosophical modernity and politics. Secondly, the expression is a product of the critique of moral values (kritik der moralischen werte), and its analysis demands, preliminarily, a discussion concerning those themes related to this critique. In third place, defined as the knowledge of the conditions and circumstances in which they [the values] grew, under which they evolved and changed`, the critique of moral values, however, is sticked on a very specific conception of the being and the existence. Therefore, it`s our hypotheses that the analysis of Nietzsche`s onthology is indispensable to access the critique and, consequently, the great politics. At last, the great politics represents a corollary of Nietzsche`s researchs developed from Truth and lie in the direction extra-moral (1873) that concerns the genesis and development of moral values and, therefore, figures as a fundamental expression of his thought.