Yale professor Odd Arne Westad, a renowned historian and global Cold War scholar, argues that U.S. President Donald Trump broke the long-standing framework of American global dominance established after the Cold War. According to Westad, Trump no longer views the United States as a "systemic power responsible for global affairs," but instead focuses on "American national interests" in a narrower sense. This logic of "putting self-interest first" represents a fundamental disruption of America's global role – and this shift is reshaping the international landscape.