The post-World War II era was defined by idealistic principles that gave rise to an extensive framework of multilateral institutions and Western-led governance structures. This established order has now arrived at a critical historical turning point.
The foreign policy approach pursued during the two administrations of US President Donald Trump—characterized by unilateralism, transactional nationalism, and a recalibration of traditional alliances—marks a significant departure from previous international norms. By combining coercive leverage with strategic media engagement, this shift has introduced a distinct foreign policy phenomenon: Trumpism.
Through its emphasis on national sovereignty combined with an anti-establishment rhetoric, Trumpism systematically challenges the fundamental assumptions that have underpinned global governance for decades.
At its essence, this represents a deliberate movement away from grand, Western-dominated global leadership toward a decentralized, issue-specific, and deeply transactional international system.
Foundational Elements of Transactional Statecraft
Trumpism’s operational approach has substituted traditional multilateral commitments with a pragmatic focus on economic statecraft and national interest. Foreign policy engagements have been explicitly linked to domestic economic priorities: reindustrialization, a strengthened defense industrial base, energy dominance, balanced trade, and leadership in the financial sector.
To accomplish these objectives, the administration moved away from expansive multinational agreements toward bilateral negotiations, employing aggressive tariffs, coercive trade measures, and sanctions as principal instruments of national power.
The administration’s reliance on sweeping sanctions regimes and aggressive extraterritorial enforcement has sparked intense global debates concerning international law, state sovereignty, and the appropriate boundaries of national jurisdiction.
Under the doctrine of “peace through strength,” Trumpism has integrated legal, economic, and security mechanisms to apply pressure on both allies and adversaries. Law enforcement operations and national security objectives have been routinely deployed as direct instruments of foreign policy.
This transactional approach has extended directly into collective defense and security frameworks, most notably NATO. Trumpism has brought intense scrutiny to Western defense burden-sharing arrangements, exposing significant imbalances where the United States had carried a disproportionate share of costs and strategic risks.
Institutional Disruption and Systemic Paralysis
The systemic consequences of Trumpism have reverberated throughout every level of the global governance hierarchy.
Within multilateral forums, the administration has demonstrated unprecedented ambivalence and unpredictability, frequently withdrawing from established international agreements and disengaging from multilateral institutions.
This volatile approach to leadership has exposed deep vulnerabilities within global governance, accelerating the fragmentation of the post-Cold War liberal international order.
A prominent casualty of this institutional disruption has been the United Nations, particularly the UN Security Council. Trump’s policies have intensified existing debates over the UNSC’s legitimacy, representation, and effectiveness.
Observers have noted that entrenched geopolitical rivalries, institutional inertia, and structural hierarchies rooted in the colonial era had already left the UNSC paralyzed—trapped in a pre-contemplation stage of reform rather than implementing substantive structural changes. US institutional disengagement has further compounded this inertia, raising fundamental questions about the long-term durability and authority of international security bodies.
While proponents have argued that the Trump administration is seeking to drive necessary institutional reform through selective, high-level engagement—such as collaborating with like-minded allies and engaging the UN secretary-general on shared priorities—critics have viewed these moves as prioritizing immediate national interests over global stability.
The Emergence of a Multipolar and Regionalized Order
As the United States steps back from global stewardship, the resulting power vacuum is catalyzing a profound restructuring of international politics. Middle powers and regional blocs are increasingly stepping forward to address governance gaps.
These actors have begun constructing regional frameworks and issue-specific coalitions, positioning them as vital supplements—or direct alternatives—to traditional Western-dominated institutions.
This global shift has ignited intense debate among international relations scholars and policymakers regarding Trump’s legacy.
On one hand, some argue that the disruptions he has caused serve as a catalyst for reform and systemic resilience. By compelling middle powers and non-Western nations to assume greater ownership of regional security and economic coordination, Trumpism is fostering a more plural, inclusive, and realistic global order capable of addressing modern geopolitical realities.
Others warn that US disengagement from multilateral commitments has undermined collective security arrangements and degraded institutional legitimacy. From this perspective, weakened Western leadership has paved the way for sustained strategic competition, regional instability, and dangerous governance voids across critical international forums.
Redefining Great Power Dynamics
The foreign policy of the Trump presidency cannot be dismissed as a temporary aberration or a simple shift in personal political style; it warrants the enduring label Trumpism because it has established a distinct, reproducible paradigm of international statecraft.
By deliberately weaponizing unpredictable diplomacy, prioritizing national prosperity over institutional continuity, and asserting absolute national sovereignty against global governance constraints, Trumpism is fundamentally redefining how a great power can exercise leverage in the modern era.
Trump’s foreign policy will leave an indelible imprint on the contemporary international system. By challenging the foundational premises of the liberal international order, it will permanently alter the balance of power, compelling the world into a new era characterized by decentralized authority, heightened regionalism, and a continuous search for innovative governance models.