Using Brazil as a case study, we examine ways in which radical right activists and leaders actively participate in world politics through religious nationalist narratives which operate on both national and transnational levels. We propose the existence of a particular subcategory of populist radical right (PRR) politics, which we call religious-populist radical right. Our argument is divided into three parts. First, we argue that religion provides ideational and material capabilities that have allowed the PRR to capture state institutions through elections. Second, we claim that once in power, the PRR’s governing strategy is conducted through transnational culture wars with religious overtones. Third, we argue that the PRR establishes novel patterns of international alliances to advance their vision of a new world order based on independent ethno-religious communities. By exploring the entanglements between the PRR and religious nationalism, we conclude that religion provides the radical right with the ideas, means, and social power to transform both state forms and world orders.