This thesis comprehensively explores the concept of soft power, with a focus on its role in shaping international relations through American popular culture. Beginning with an overview of Joseph Nye's foundational work on soft power, the study delves into the evolving theoretical frameworks proposed by various scholars. It assesses the impact of American pop culture on a global scale, examining its influence through music, movies, television, fashion, and technology. Critiques regarding cultural imperialism are addressed, emphasizing the need for cultural authenticity and responsible exchange. The geopolitical implications of American soft power are analyzed, highlighting its strategic use in diplomacy and international relations. The study acknowledges the challenges posed by cultural homogenization, commodification, and perpetuation of stereotypes, advocating for a balanced approach that fosters cultural authenticity and mutual respect. Case studies on the global reception and adaptation of American culture in diverse regions offer nuanced insights. The digital era's role in democratizing cultural influence is explored, emphasizing the need for strategic engagement with online platforms and technological advancements. The study concludes with recommendations for policymakers, cultural institutions, and scholars, emphasizing adaptability, inclusivity, and continued research in navigating the dynamic landscape of global soft power dynamics. Overall, this thesis provides a comprehensive and insightful exploration of American soft power, offering valuable perspectives for academics, policymakers, and cultural stakeholders in the evolving multipolar global arena.