Proceedings of the International scientific and practical conference ―Cambridge Congress of Advanced Studies‖ (April 3-5, 2026) / Publisher website: www.naukainfo.com. - Cambridge, United Kingdom, 2026. - 350 p.

44 INTERNATIONAL RELATIONS UDC 327:339.92:316.32 Valentyna Babina PhD (Political Science) associate professor Department of International Relations and Law Odesa Polytechnic National University Odesa, Ukraine REGIONAL SYSTEM OF INTERNATIONAL RELATIONS IN THE CONTEXT OF GLOBAL TRANSFORMATIONS Abstract. The article examines the transformation of regional systems of international relations in the context of contemporary global transformations. Particular attention is paid to the influence of economic, environmental, and security challenges on the functioning and development of regional cooperation mechanisms. The study analyzes the dynamics of regional integration processes in the European Union, Eastern Europe, and the Asia-Pacific region, emphasizing their adaptation to globalization, geopolitical instability, and emerging hybrid threats. It is argued that global economic crises, climate change, energy security issues, and geopolitical tensions significantly affect the stability and resilience of regional systems. The research demonstrates that despite differences in historical development and institutional structures, regional systems increasingly rely on coordinated policies, integration platforms, and collective mechanisms of cooperation to respond effectively to global challenges. The findings indicate that the transformation of regional systems represents a key element of the contemporary international order and contributes to strengthening regional stability, sustainable development, and international cooperation.