حسن مهرپویا

Although the United States of America was able, after the end of the Second World War until the first decade of the third millennium, to obtain all the necessary conditions for taking he-gemony and the leadership of the free world, with the post-Cold War transformations, grounds were provided for the hegemony of America to undergo decline. The emergence of powers such as China, Russia, and the European Union, alongside certain regional crises such as the 2022 Ukraine crisis, are counted among those developments that provided the grounds for the further decline of American hegemony. This research, with documentary study and qualitative method of data and with theoretical content and explanatory (causal) method as well as de-scriptive–analytical method, and based on the theoretical framework of “long cycles,” while investigating the roots of the 2022 Ukraine crisis, is responsible for answering this question: What effect has the 2022 Ukraine crisis had on the decline of American hegemony? The anal-ysis of data and the results obtained have shown that: the 2022 Ukraine crisis caused the he-gemony of America to be challenged in creating balance in the domains under the influence of Russia, and consequently, America’s inability in solving the 2022 Ukraine crisis.