Finding an analytical framework to understand the complex dynamics of the international system after September 11th, 2001, has turned to be the main challenge for the discipline of International Relations. The systemic current of the geopolitics has faced this complex task by stating an interconnected and interdependent world system where agents compete against each other in different arenas in order to establish dominant positions that enable some influence on others’ behavior. Thus, taking into account some tenets drawn from Gerard Dussouy about the systemic geopolitics and the South American subsystem considered as a testing ground, this paper addresses this topic by proposing a model for further analysis to approach the role of non-state actors in the international system, as well as the interconnection between fields of action as a principle of empowerment within global relations.