This study is a theoretical effort to rethink International Relations from the perspective of Neo-Gramscian Critical Theory in which its empirical object is the US hegemony in the scope of Latin America. More specifically, this study refers to the fabrication of consensus directed by an American ruling class through its own vehicle for this – the Atlas Network – which finds legitimacy and support in its Latin American counterparts. Based on primary data, public documents, and specialised bibliography, this study aims to contribute to the rethinking of International Relations using this institute as an object of empirical relation to theoretical study. More than presenting domination strategies through private hegemony apparatus, this study encourages us to reflect on relatively forgotten (or marginalised) practices and concepts in International Relations, such as imperialism, hegemony, and the role of consensus building. Finally, from Critical Theory, it contributes to understand the role of ruling classes in the creation of consensus in subaltern countries and classes to maintain this same hegemonic structure.