Is Russia's invasion of Ukraine justified?

Whether Russia's invasion of Ukraine is "justified" is a central point of international dispute. However, according to the overwhelming majority of international legal scholars, the United Nations, and the global community, the invasion is not justified and constitutes an illegal act of aggression.

To understand this issue fully, it is helpful to look at the arguments put forward by the Russian government, contrasted with the legal and factual consensus of the international community.

1. The Global Consensus: Why the Invasion is Deemed Unjustified

The international community—including the United Nations, the International Court of Justice (ICJ), and the vast majority of sovereign states—views the invasion as a flagrant violation of international law. The core arguments against the justification of the invasion include:

•Violation of the UN Charter (Article 2(4)): The foundation of modern international law is the UN Charter, which requires all member states to "refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state." Russia’s full-scale invasion is widely seen as a direct violation of this principle.

•UN General Assembly Condemnation: In March 2022, the UN General Assembly voted overwhelmingly (141 to 5) to adopt Resolution ES-11/1, which condemned Russia's aggression, declared the invasion a violation of the UN Charter, and demanded the immediate withdrawal of Russian forces. Subsequent votes have continued to overwhelmingly condemn Russia’s attempts to annex Ukrainian territory.

•The International Court of Justice (ICJ) Ruling: In March 2022, the ICJ—the principal judicial organ of the UN—ordered Russia to immediately suspend its military operations in Ukraine. The court found no legal basis or evidence to support Russia’s claims of genocide being committed by Ukraine, which Moscow had used as a primary justification for its attack.

•Sovereign Equality: Under international law, Ukraine is a sovereign, independent state with the legal right to determine its own foreign policy, choose its security alliances (including pursuing NATO membership), and govern its own territory without foreign military intervention.

2. Russia’s Arguments for Justification

Russian President Vladimir Putin and the Russian government have presented several legal, political, and historical arguments to justify what they officially term a "special military operation":

•Defense Against NATO Expansion: Moscow argues that the eastward expansion of NATO—specifically the prospect of Ukraine joining the alliance—poses an existential, unacceptable security threat to Russia. Russia claims this violates verbal assurances allegedly made to Soviet leaders at the end of the Cold War.

•Protection of Russian-Speakers in Donbas: The Kremlin claimed that the Ukrainian government was committing "genocide" against the Russian-speaking population in the eastern Ukrainian regions of Donetsk and Luhansk. Russia argued that its military intervention was necessary to protect these populations.

•Collective Self-Defense (Article 51 of the UN Charter): Just before the invasion, Russia officially recognized the self-proclaimed Donetsk and Luhansk "People’s Republics" as independent states. Moscow argued that under Article 51 of the UN Charter, which permits collective self-defense, Russia was legally allowed to intervene to defend these newly recognized "allies."

•"Demilitarization and Denazification": Russia claimed that Ukraine’s government was dominated by neo-Nazis and far-right nationalists who posed a threat to Russia and to Ukrainian citizens, necessitating a forced "demilitarization and denazification" of the country.

•Historical and Cultural Claims: Putin has frequently argued that Russians and Ukrainians are "one people" and that large parts of Ukraine consist of historically Russian lands that were wrongfully separated during the dissolution of the Soviet Union.

3. The Rebuttals to Russia’s Claims

Foreign policy experts, historians, and international lawyers have systematically refuted Russia's justifications:

•No Legal Basis for Self-Defense: Legal experts point out that Article 51 of the UN Charter only allows self-defense in response to an actual or imminent armed attack. Ukraine had not attacked Russia. Furthermore, Donetsk and Luhansk were legally part of Ukraine's sovereign territory, not independent states; therefore, Russia could not claim "collective self-defense" on their behalf.

•No Evidence of Genocide: Independent international observers, the UN, and the OSCE found no evidence of "genocide" or systematic extermination of Russian-speakers in eastern Ukraine. While the conflict in Donbas between 2014 and 2022 did result in civilian casualties on both sides, this was a result of active warfare, not a targeted genocide.

•The "Denazification" Pretext: While Ukraine—like many European countries—has far-right political groups, they represent a tiny minority of the political spectrum (securing less than 2% of the vote in the 2019 parliamentary elections). Ukrainian President Volodymyr Zelenskyy is Jewish, lost family members in the Holocaust, and was democratically elected in 2019 with over 73% of the vote. The claim of "denazification" is widely rejected as a fabricated pretext to overthrow a democratically elected government.

•Sovereign Right to Choose Alliances: NATO is a defensive alliance, and membership is voluntary. International law dictates that a sovereign nation has the right to choose its own security arrangements, and no third party (such as Russia) has a legal veto over another nation’s foreign policy decisions.

Conclusion

While the Russian government has presented various security, humanitarian, and historical rationales to justify its actions, these arguments are overwhelmingly rejected by the international community. Under international law and the UN Charter, Russia's invasion of Ukraine is considered an unprovoked, unjustified, and illegal war of aggression.

Citations (5)

1icds.eeNonprofits and think tanks
icds.ee
Backs: “The international community—including the United Nations, the International Court of Justice (ICJ), and the vast majority of sovereign states—views the invasion as a flagrant violation of international law. The core arguments against the justification of the invasion include:”
2cfr.orgNonprofits and think tanks
cfr.org
Backs: “The international community—including the United Nations, the International Court of Justice (ICJ), and the vast majority of sovereign states—views the invasion as a flagrant violation of international law. The core arguments against the justification of the invasion include:”
3westpoint.eduAcademic
westpoint.edu
Backs: “The international community—including the United Nations, the International Court of Justice (ICJ), and the vast majority of sovereign states—views the invasion as a flagrant violation of international law. The core arguments against the justification of the invasion include:”
4tandfonline.comAcademic
tandfonline.com
Backs: “The court found no legal basis or evidence to support Russia’s claims of genocide being committed by Ukraine, which Moscow had used as a primary justification for its attack. Sovereign Equality: Under international law, Ukraine is a sovereign, independent state with the legal right to determine its own foreign policy,…”
5american.eduAcademic
american.edu
Backs: “The court found no legal basis or evidence to support Russia’s claims of genocide being committed by Ukraine, which Moscow had used as a primary justification for its attack. Sovereign Equality: Under international law, Ukraine is a sovereign, independent state with the legal right to determine its own foreign policy,…”