Introduction: The study aims to analyze the evolution of political institutions in Ukraine. Hence, the main objective is to analyze the evolution of political institutions in Ukraine within the framework of the modern Russian-Ukrainian war, with an emphasis on the main vectors of change and their impact on the country's political system. Methods: The research employed content analysis, thematic analysis, and coding to systematically examine relevant scientific literature and other sources on the topic. These methods were applied to identify and categorize Ukraine's political structures' main themes and transformations.Results: The results determined that the most significant changes in the system of development of political structures took place after the Revolution of Dignity and the beginning of the Russian invasion of Crimea in 2014, which necessitated systemic changes in the political organization of Ukraine. It was also established that Russian aggression influenced active transformations in the political structures of Ukraine, in particular, the modernization of the state apparatus, the growing role of civil society, active international support, decentralization of power, and strengthening of national identity. Conclusions: The conclusions also emphasize that there are challenges related to the crisis of confidence in parliamentarism and the party system. However, the study recognized that the transformations that took place as a result of Russian aggression created new opportunities for the development of the state body and political structures of Ukraine
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