Abstract
The article analyzes the phenomenon of grey areas in a comparative perspective between the theory of international relations and public international law. First, a review is made of its implications for the Rule of Law and the challenges they represent for international security. In a second moment the theoretical discussion will be approached, from a case study, regarding the concept of State sovereignty between international law and the theoretical paradigms of international relations, the previous from the analysis of the so-called Zone of the Triple Frontier of Para and its growing problem of transnational organized crime. Finally, an attempt will be made to propose an answer to the question about the scope of the notion of sovereignty in the contemporary international context.
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