The purpose of the article is to demonstrate the existence of an impassable border between humanity and animality into Giambattista Vico’s Diritto universale. To do this, first the characteristics of human nature according to Vico will be shown. Then the applicability of this definition will be supported also to the “bestioni”, the cruel post-diluvian wandering men. Finally, the role of the idea of God will be investigated, in order to demonstrate its importance for Vico's definitions
