Written from a vantage point in between Security Studies, Political Theory, and Governance Studies, this article attempts to theorize the current mobilization of civil society for the purposes of “national security,” “risk precaution,” or “homeland resilience” as the emergence of a neo-republican form of security governance—a mode of governance more reliant on organicist means of social construction than on economic or individualist instruments of social control. We argue that if the discipline of International Relations (IR) wishes to understand the nature of this emerging security order, it needs to assume a more cross-disciplinary approach and to develop a much richer idea of republicanism as not only a political philosophy but also a practice of governance.