Is Russia's invasion of Ukraine justified?

Whether Russia's invasion of Ukraine is justified is a central question of contemporary global politics, with a stark division between the official positions of the Russian government and the overwhelming consensus of the international community, international law, and global organizations.

The Position of the International Community and International Law

According to the vast majority of sovereign states, international legal scholars, and global institutions, Russia’s invasion of Ukraine is unprovoked, illegal, and completely unjustified.

•Violation of the UN Charter: The United Nations Charter (Article 2(4)) strictly prohibits member states from using force against the territorial integrity or political independence of another state. Legal scholars almost universally agree that Russia's invasion is a direct and flagrant violation of this cornerstone of international law.

•United Nations Resolutions: On March 2, 2022, the UN General Assembly voted overwhelmingly (141 to 5) to adopt a resolution condemning the invasion. The resolution "deplores in the strongest terms the aggression by the Russian Federation against Ukraine" and demanded that Russia immediately and unconditionally withdraw all military forces. Subsequent UN votes have repeatedly reaffirmed this stance.

•The International Court of Justice (ICJ): In March 2022, the ICJ ordered Russia to immediately suspend its military operations in Ukraine. In February 2024, the court also ruled that it had jurisdiction to hear Ukraine's request to formally declare that Ukraine had not committed genocide in the Donbas region—the primary humanitarian justification Russia used to launch its offensive.

•Crime of Aggression: Because Ukraine did not attack or imminently threaten to attack Russia, international law experts classify the invasion as a "crime of aggression"—defined under the Rome Statute as a manifest violation of the UN Charter by the scale and character of the military force used.

Russia’s Stated Justifications

The Russian government, led by President Vladimir Putin, has presented several legal, historical, and security arguments to justify what it terms a "special military operation". These justifications include:

•Preventing "Genocide" in the Donbas: Putin argued that the military intervention was necessary to protect Russian-speaking populations in the eastern Ukrainian regions of Donetsk and Luhansk from "abuse and genocide" perpetrated by the Ukrainian government.

•Collective Self-Defense (Article 51): Just prior to the invasion, Russia formally recognized the breakaway Donetsk and Luhansk "People's Republics" (DPR and LPR) as independent states. Russia argued that under Article 51 of the UN Charter—which allows for collective self-defense—it was legally permitted to send troops to defend these self-proclaimed republics at their request.

•"Demilitarization and Denazification": Russia claimed that Ukraine had been co-opted by far-right, neo-Nazi elements hostile to Russia, posing an ideological and physical threat that required the "demilitarization and denazification" of the country.

•NATO Expansion and Security Guarantees: Russia has long argued that the eastward expansion of NATO (and Ukraine’s stated ambition to join the alliance) represents an existential threat to Russian national security. Moscow asserts that the West broke post-Cold War promises regarding NATO's boundaries and that a hostile military alliance on its border is unacceptable.

•Historical and Cultural Unity: In speeches and essays, Putin has argued that Ukrainians and Russians are "one people" and that Ukraine is an artificial state carved out of historical Russian lands. This irredentist claim suggests that Russia has a historical right to control or heavily influence Ukrainian territory.

Rebuttals to Russia’s Justifications

International legal experts, historians, and foreign policy analysts have systematically challenged and rejected each of Russia's claims:

•No Evidence of Genocide: Independent international monitors, including the UN and the Organization for Security and Co-operation in Europe (OSCE), found no evidence of "genocide" or systemic extermination of Russian-speakers in eastern Ukraine. Legal scholars point out that even if human rights abuses had occurred, international law does not permit unilateral military invasions as a tool for humanitarian intervention.

•Misuse of Article 51 (Self-Defense): Article 51 only permits self-defense in response to an actual or imminent armed attack against a UN member state. Ukraine did not attack Russia. Furthermore, the DPR and LPR are internationally recognized as sovereign territory of Ukraine; Russia's unilateral recognition of them did not make them sovereign states eligible for collective self-defense under international law.

•National Sovereignty and NATO: Under international law and treaties signed by Russia (such as the 1975 Helsinki Accords and the 1994 Budapest Memorandum), Ukraine is a sovereign country with the inherent right to choose its own foreign policy, security alignments, and alliances. A country's desire to join a defensive alliance does not legally justify a preemptive invasion by a neighbor.

•The "Tu Quoque" (Appeal to Hypocrisy) Argument: In defending its actions, Russia frequently points to past Western military interventions—such as the 1999 NATO bombing of Yugoslavia or the 2003 U.S.-led invasion of Iraq—to argue that the West applies international law hypocritically. While many international law experts agree that some past Western interventions violated international law, they emphasize that past violations by other states do not legally excuse or justify Russia’s invasion of Ukraine.

Conclusion

While Russia defends its invasion as a preemptive measure to safeguard its national security, protect Russian-speakers, and reclaim historic spheres of influence, the global legal and political consensus is that the invasion is an unjustified act of aggression that violates the fundamental principles of state sovereignty and international law.

Citations (9)

1cfr.orgNonprofits and think tanks
cfr.org
Backs: “Whether Russia's invasion of Ukraine is justified is a central question of contemporary global politics, with a stark division between the official positions of the Russian government and the overwhelming consensus of the international community, international law, and global organizations.”
2wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “Whether Russia's invasion of Ukraine is justified is a central question of contemporary global politics, with a stark division between the official positions of the Russian government and the overwhelming consensus of the international community, international law, and global organizations.”
3tandfonline.comAcademic
tandfonline.com
Backs: “Whether Russia's invasion of Ukraine is justified is a central question of contemporary global politics, with a stark division between the official positions of the Russian government and the overwhelming consensus of the international community, international law, and global organizations.”
4westpoint.eduAcademic
westpoint.edu
Backs: “According to the vast majority of sovereign states, international legal scholars, and global institutions, Russia’s invasion of Ukraine is unprovoked, illegal, and completely unjustified.”
5icds.eeNonprofits and think tanks
icds.ee
Backs: “Legal scholars almost universally agree that Russia's invasion is a direct and flagrant violation of this cornerstone of international law. United Nations Resolutions: On March 2, 2022, the UN General Assembly voted overwhelmingly (141 to 5) to adopt a resolution condemning the invasion.”
6europa.euGovernment
europa.eu
Backs: “United Nations Resolutions: On March 2, 2022, the UN General Assembly voted overwhelmingly (141 to 5) to adopt a resolution condemning the invasion. The resolution "deplores in the strongest terms the aggression by the Russian Federation against Ukraine" and demanded that Russia immediately and unconditionally…”
7chathamhouse.orgNonprofits and think tanks
chathamhouse.org
Backs: “Crime of Aggression: Because Ukraine did not attack or imminently threaten to attack Russia, international law experts classify the invasion as a "crime of aggression"—defined under the Rome Statute as a manifest violation of the UN Charter by the scale and character of the military force used.”
8reddit.comForums and Q&A
reddit.com
Backs: “"Demilitarization and Denazification": Russia claimed that Ukraine had been co-opted by far-right, neo-Nazi elements hostile to Russia, posing an ideological and physical threat that required the "demilitarization and denazification" of the country. NATO Expansion and Security Guarantees: Russia has long argued that…”
9harvard.eduAcademic
harvard.edu
Backs: “The "Tu Quoque" (Appeal to Hypocrisy) Argument: In defending its actions, Russia frequently points to past Western military interventions—such as the 1999 NATO bombing of Yugoslavia or the 2003 U.S.-led invasion of Iraq—to argue that the West applies international law hypocritically. While many international law…”