Politicians once framed foreign policy as a dance of state interests—alliances built on mutual security, trade pacts forged through economic logic. But beneath this veneer, a deeper tremor has taken hold: the ascendance of ethnonationalism. It’s not merely a resurgence of identity politics—it’s a tectonic shift reshaping how states pursue power, define allies, and justify intervention.

Understanding the Context

The result? Foreign policy has grown more volatile, less predictable, and increasingly constrained by internal fissures that spill across borders.

From Ideology to Instrumentalization: The Evolution of Ethnonationalism

Ethnonationalism, at its core, elevates ethnic identity as the primary basis for political loyalty. Historically, it emerged in the 19th century as a unifying force—sometimes liberating, sometimes oppressive. Today, however, it’s weaponized: exploited by autocrats and demagogues to consolidate domestic control while simultaneously distorting foreign engagement.

Recommended for you

Key Insights

In Hungary, Viktor Orbán’s framing of “Christian European identity” isn’t just domestic rhetoric—it’s a foreign policy doctrine that rejects multiculturalism as existential, aligning Budapest with like-minded regimes in Poland and the Balkans. This isn’t organic nationalism; it’s a calibrated strategy to isolate liberal democracies and bolster illiberal coalitions.

What’s often overlooked is how ethnonationalism corrupts institutional trust. In the U.S., debates over immigration policy have transcended policy into cultural warfare. When foreign leaders observe American foreign decisions—from sanctions on Russia to aid to Ukraine—they don’t just assess strategic interests; they parse signals about perceived national cohesion. Does the U.S.

Final Thoughts

present a unified front, or is it fractured by ethnic and regional fault lines? That perception reshapes credibility. When domestic discord is visible, allies question resolve; adversaries calculate weakness.

Diplomacy Under Pressure: The Erosion of Consensus

Foreign policy thrives on predictability. Treaties hold because parties believe in shared norms. But ethnonationalist governments often reject universalism. Consider India’s shifting stance on Kashmir: while New Delhi insists on territorial sovereignty as a non-negotiable national duty, this position complicates relations with Pakistan and strains ties with Muslim-majority nations.

Similarly, in Turkey, President Erdoğan’s invocation of pan-Turkic identity has strained NATO cohesion, as Ankara prioritizes ethnic solidarity over alliance cohesion. These choices aren’t anomalies—they’re symptoms of a broader trend: states using ethnic identity to redefine sovereignty, often at the expense of multilateral cooperation.

This shift destabilizes traditional diplomacy. Negotiations grow more transactional, less principle-driven. When leaders frame foreign policy through ethnic lenses—“we defend our people,” “we protect our heritage”—they leave little room for compromise.