Editora Unesp THE SUSTAINABLE DEVELOPMENT GOALS AND SOUTH-SOUTH COOPERATION IN MERCOSUR Heitor Erthal *   João Victor da Motta Baptista ** Introduction Throughout the history of the International System, there have been many attempts to collectively create solutions or agendas on significant issues, such as nuclear weapons technology. After the Cold War, these issues became more diverse, so topics such as the environment gained strength in international relations. In the 21st century, it has become a common topic in international organizations discussions, especially at the United Nations (UN), how to build a common ground between development and environment preservation. At the same time, policymakers disagree about the issue’s relevance or reject it as a necessity for your future. 7. * PhD Candidate at the Graduate Program in International Relations “San Tiago Dantas” (Unesp/Unicamp/PUC-SP). Researcher at the Observatory of Regionalism. E-mail: heitorerthal@gmail.com. ** PhD Candidate at the Graduate Program in International Relations “San Tiago Dantas” (Unesp/Unicamp/PUC-SP). Master in Interna- tional Relations by the same postgraduate program. Researcher at the Observatory of Regionalism. E-mail: joaovictor.dmb@hotmail.com.