This book provides an innovative and interdisciplinary experiment in applying quantum thinking to the economic-security ambivalences of international economic law.Responding to the shifting economic-security dynamics of today's emerging geoeconomic order, this book develops the analytical framework of 'quantizing geoeconomics'. Quantum measurement and holism theories are extrapolated through analogy, ontology, and post-critique approaches. It demonstrates how quantum thinking illuminates macro-level economic-security dynamics, cybersecurity governance, and energy security jurisprudence. The book advances a pluralistic governance model anchored in national autonomy and regulatory coordination. It further reveals the theoretical, practical, and normative relevance of quantum thinking in contemporary global governance. This book presents a meaningful experiment in 'quantum international law'.The book will be of interest to researchers in the fields of economics, international economic law, international law, and global governance. By emphasizing inclusivity, resilience, and pluralism, it also provides policymakers and practitioners with novel perspectives for integrative strategies to navigate and reconcile the complex paradoxes shaping international economic law.