Conomic–Security Interactions and the Open International System after the Russia–Ukraine War : Focusing on Energy Security and Supply Chain Crises

This study examines how the relationship between economics and security has been reconfigured in the context of the energy security crisis and global supply chain disruptions following the Russia–Ukraine war. From a geoeconomic perspective, the study analyzes the process through which economic instruments have become core components of national security strategy and explores the implications of this transformation for the openness and functioning of the international system. In particular, this study proposes an analytical framework of economic–security interaction consisting of crisis type, policy instruments, institutionalization, and systemic outcomes, and applies it to the European Union’s responses to energy and supply chain crises. The findings show that energy and supply chains are no longer subordinate domains of economic policy but have been redefined as core security issues directly related to national survival. Economic–security interaction thus reflects a structural transformation of the international order. The EU case demonstrates that intensifying geoeconomic competition does not necessarily lead to the closure of the international system; rather, openness and security can coexist through institutional adjustment. By highlighting the limitations of the traditional economics–security dichotomy, this study suggests the possibility of a conditional reconstruction of an open international system.