Revisiting the Concept of State Sovereignty in the Context of the Transformation of Modern Constitutionalism: From Absolute Sovereignty to "Shared" Sovereignty

Modern processes of globalization, regional integration, and digitalization create the need to review established approaches to state sovereignty as a key concept of constitutional law. In the context of the transformation of constitutionalism, the importance of studying the mechanisms of redistribution of sovereign prerogatives among the state, international organizations, and other supranational entities increases. The relevance of the topic is determined by the search for a legal balance between preserving national sovereignty and the necessity for effective integration into global processes. The subject of the study is the theoretical and legal foundations and institutional manifestations of the transformation of sovereignty in modern constitutionalism. The forms and limits of "shared" sovereignty are analyzed within the context of contemporary public law. Special attention is paid to the interaction of international and national mechanisms for limiting and reformatting sovereignty. The analysis of the legal positions of the highest judicial instances serves as an empirical basis for substantiating the concept of "shared" sovereignty. The methodological foundation of the research consists of the principles of historicism, systemic and institutional analysis, as well as an interdisciplinary approach that combines legal, political, and philosophical perspectives. The study employs general scientific methods of analysis, synthesis, induction, and deduction, as well as specific legal methods, including comparative legal, formal-legal, and constitutional modeling methods. The novelty of the study lies in the identification of the evolution of the concept of sovereignty from its absolute understanding to the model of "shared" sovereignty within the framework of modern constitutionalism. The work offers an author's vision of the relationship between the national and supranational levels of public authority implementation in the context of legal globalization. It concludes that there is a need for doctrinal and normative rethinking of traditional sovereignty, taking into account modern constitutional practices. The research identifies legal risks and challenges associated with the erosion of the limits of sovereign power. It proposes directions for adapting legal systems to new forms of interstate and supranational interaction. The theoretical basis includes both classical doctrines of sovereignty by J. Bodin and T. Hobbes, and contemporary theories of governance, globalization, and transnational constitutionalism, considering the dynamics of modern legal systems.