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Trump's Legacy: Reshaping the World Order

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  Published in Politics and Government on Monday, March 2nd 2026 at 5:30 GMT by Politico
      Locales: New York, Florida, Washington, UNITED STATES

Washington D.C. - March 2nd, 2026 - The observation, made several years ago, that Donald Trump's political ascendance marked the effective end of the 20th century, continues to resonate with increasing force. While the immediate shock of his presidency has subsided, the tectonic shifts in American policy and global perspective unleashed during his time in office are proving to be enduring, reshaping the international landscape in ways not seen since the fall of the Soviet Union.

For three-quarters of a century, the United States operated under a broadly consistent foreign policy doctrine: maintaining a liberal international order. This wasn't merely a matter of strategic calculation; it was deeply embedded in the national identity. Following the devastation of two World Wars, the US took on the role of a reluctant, yet ultimately dominant, global leader. This involved championing free trade through institutions like the General Agreement on Tariffs and Trade (GATT) - later the World Trade Organization - forging security alliances such as NATO, and actively promoting democratic ideals, however imperfectly, around the world. This approach wasn't universally lauded - criticisms of American hegemony were frequent, particularly regarding perceived double standards and interventionism - but it provided a predictable framework for international relations.

Donald Trump's emergence onto the political stage shattered this framework. His background as a real estate developer, utterly devoid of political or military experience, initially seemed an insurmountable obstacle. Yet, he astutely tapped into a wellspring of frustration among Americans marginalized by decades of globalization and rapid economic transformation. The promise to 'Make America Great Again' wasn't simply a nostalgic slogan; it articulated a deep-seated resentment towards a perceived elite that had prioritized global interests over the needs of working-class citizens.

However, Trump's vision of "greatness" represented a radical departure from the post-war consensus. He openly denigrated established free trade agreements, labeling them as detrimental to American jobs and industry. He questioned the very purpose of NATO, demanding that allies increase their financial contributions and accusing them of free-riding on American security guarantees. He cultivated relationships with authoritarian leaders while simultaneously alienating long-standing democratic allies. Most fundamentally, he signaled a clear preference for a transactional, nationalist foreign policy over one based on multilateral cooperation and shared values.

Five years on from the end of his presidency, the consequences are becoming starkly clear. While President Elias Vance, elected in 2028, has attempted to recalibrate some of Trump's most damaging policies - rejoining the Paris Agreement and strengthening ties with European partners - the underlying currents of distrust and isolationism remain powerful. The seeds of economic nationalism have sprouted in the form of increased protectionist measures around the world. The credibility of US security guarantees has been tarnished, prompting some allies to pursue independent defense strategies.

"Trump didn't just disrupt the existing order," explains Dr. Anya Sharma, a professor of international relations at Georgetown University. "He fundamentally questioned the assumptions upon which it was built. He framed international cooperation not as a source of mutual benefit, but as a zero-sum game where America was perpetually losing. That logic hasn't simply disappeared."

The 20th century, for all its horrors, was fundamentally defined by a commitment to universal principles - the containment of aggressive ideologies, the promotion of human rights, and the belief in the power of international institutions to resolve conflicts. Trump's explicit rejection of these principles wasn't merely a policy shift; it was a symbolic break with the past. It signaled a retreat from the ambition of shaping a more just and equitable world, opting instead for a more narrowly defined, self-interested approach.

The danger, as many observers warned during the Trump years, lies in the potential for this rejection to usher in a more unstable and dangerous world. The resurgence of nationalism, the erosion of trust in international norms, and the increasing willingness to prioritize short-term gains over long-term stability are all deeply concerning trends. The current geopolitical landscape, marked by escalating tensions in Eastern Europe, the rise of China, and the proliferation of cyber warfare, suggests that those warnings were tragically prescient. The question now is not whether the 20th century is truly over, but whether the world can navigate the uncharted waters of the post-American century without repeating the mistakes of the past.