The opinion piece discusses the implications of the U.S. unilateral use of force in Venezuela and Iran, asserting that this shift necessitates a reevaluation of sovereignty principles and legitimate intervention. The author highlights a significant moment in international relations marked by the erosion of the previous global order and an emerging normalcy of violence, pressing Brazil to devise a deterrence strategy against potential U.S. interventions that might impose physical costs on Brazilian sovereignty. Moreover, the article points to the polarizing global reactions to the overthrow of regimes in these nations, which reflect a diversity of ideological positions and historical contexts, shaping public sentiment toward interventionist actions. Furthermore, it delves into the legal ramifications of U.S. actions, juxtaposing the principles of sovereignty and self-determination against the fluctuating justifications for intervention, suggesting that Brazil's response should be grounded in a careful consideration of these legal frameworks as it navigates its foreign policy in the face of rising unilateralism from the U.S.