Is Russia's invasion of Ukraine justified?

Under international law, and by the overwhelming consensus of the global community, Russia’s invasion of Ukraine is considered unprovoked, illegal, and unjustified.

However, the Russian government has put forward several arguments to justify its military actions. To understand the debate surrounding the justification of the invasion, it is necessary to examine the consensus under international law alongside the specific arguments presented by Russia and how they are viewed globally.

1. The Consensus Under International Law

The vast majority of sovereign states, legal scholars, and international organizations reject Russia's justifications and view the invasion as a clear violation of global order:

•Violation of the UN Charter: Article 2(4) of the United Nations Charter strictly prohibits member states from using or threatening to use force against "the territorial integrity or political independence of any state." Legal experts overwhelmingly agree that Russia's invasion is a direct violation of this foundational principle of international law.

•UN General Assembly Condemnation: In March 2022, the UN General Assembly voted overwhelmingly (141 countries in favor, 5 against, and 35 abstaining) to adopt a resolution condemning the invasion. The resolution demanded that Russia immediately, completely, and unconditionally withdraw all of its military forces from Ukraine.

•The International Court of Justice (ICJ) Ruling: In March 2022, the ICJ—the principal judicial organ of the UN—issued a legally binding order instructing Russia to "immediately suspend the military operations" it had commenced. Russia chose to ignore this order.

•International Criminal Court (ICC) Actions: The ICC has issued multiple arrest warrants related to the conflict, including one for Russian President Vladimir Putin, citing reasonable grounds to believe he bears responsibility for war crimes, specifically the unlawful deportation of Ukrainian children.

2. Russia’s Justifications and Global Rebuttals

The Russian government, led by Vladimir Putin, has presented several security, historical, and humanitarian arguments to justify its "special military operation." Each of these claims has been met with strong counterarguments from Ukraine, Western nations, and international legal experts:

Claim A: NATO Expansion and Security Threats

•Russia’s Stance: Russia argues that the eastward expansion of the North Atlantic Treaty Organization (NATO)—particularly the prospect of Ukraine joining the alliance—poses an existential national security threat. Moscow claims that Western powers broke informal post-Cold War promises not to expand NATO toward Russia’s borders.

•The Rebuttal: Legal and geopolitical experts point out that Ukraine is a sovereign, independent state. Under international law, sovereign nations have the inherent right to choose their own foreign policies, security arrangements, and alliances. Furthermore, NATO is a defensive alliance, and the possibility of a country joining a defensive alliance in the future does not meet the high threshold required under international law to justify a preemptive military invasion.

Claim B: Protection Against "Genocide" in Donbas

•Russia’s Stance: Putin claimed that the military intervention was necessary to protect Russian-speaking populations in the eastern Ukrainian regions of Donetsk and Luhansk from "genocide" perpetrated by the Ukrainian government.

•The Rebuttal: The United Nations, the Organization for Security and Co-operation in Europe (OSCE), and independent international observers found absolutely no evidence of genocide against Russian-speakers in eastern Ukraine. Ukraine filed a case against Russia at the ICJ to challenge these claims. In 2024, the ICJ accepted jurisdiction to rule on Ukraine's "reverse compliance" claim (to officially declare that Ukraine did not commit genocide), while previously emphasizing that Russia could not use false claims of genocide as a legal loophole to justify an invasion.

Claim C: "Demilitarization and Denazification"

•Russia’s Stance: The Kremlin asserted that the invasion was intended to "demilitarize" and "denazify" Ukraine, alleging that the country was run by a neo-Nazi regime hostile to Russia.

•The Rebuttal: This claim is widely dismissed as propaganda designed to appeal to Russian domestic historical sentiments. Ukraine is a functioning constitutional democracy. Its president, Volodymyr Zelenskyy, is Jewish and lost family members in the Holocaust. While Ukraine, like many European nations, has far-right political factions, they hold no major seats in the Ukrainian parliament and have virtually no influence over government policy.

Claim D: Collective Self-Defense (Article 51 of the UN Charter)

•Russia’s Stance: Immediately before the invasion, Russia unilaterally recognized the breakaway regions of Donetsk and Luhansk as independent states. Russia argued that the invasion was a form of "collective self-defense" under Article 51 of the UN Charter, carried out at the request of these newly recognized republics.

•The Rebuttal: Under international law, unilateral recognition of breakaway regions within another sovereign nation's borders has no legal validity. Because Donetsk and Luhansk are legally recognized as part of Ukraine, they did not have the status of sovereign states and therefore had no legal authority to request collective self-defense. Furthermore, Article 51 only permits self-defense in response to an actual or imminent armed attack, which Ukraine had not launched against Russia.

Summary

While Russia has presented various arguments to frame its invasion as a defensive, humanitarian, or preventative measure, these arguments are widely considered by the international community to lack factual and legal basis. From the perspective of international law, the UN, and major global judicial bodies, Russia's military action in Ukraine is an unlawful war of aggression.

Citations (10)

1cfr.orgNonprofits and think tanks
cfr.org
Backs: “Under international law, and by the overwhelming consensus of the global community, Russia’s invasion of Ukraine is considered unprovoked, illegal, and unjustified.”
2inss.org.ilAcademic
inss.org.il
Backs: “Violation of the UN Charter: Article 2(4) of the United Nations Charter strictly prohibits member states from using or threatening to use force against "the territorial integrity or political independence of any state." Legal experts overwhelmingly agree that Russia's invasion is a direct violation of this…”
3cambridge.orgAcademic
cambridge.org
Backs: “Violation of the UN Charter: Article 2(4) of the United Nations Charter strictly prohibits member states from using or threatening to use force against "the territorial integrity or political independence of any state." Legal experts overwhelmingly agree that Russia's invasion is a direct violation of this…”
4wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “The International Court of Justice (ICJ) Ruling: In March 2022, the ICJ—the principal judicial organ of the UN—issued a legally binding order instructing Russia to "immediately suspend the military operations" it had commenced. Russia chose to ignore this order.”
5asil.orgNonprofits and think tanks
asil.org
Backs: “Russia chose to ignore this order. International Criminal Court (ICC) Actions: The ICC has issued multiple arrest warrants related to the conflict, including one for Russian President Vladimir Putin, citing reasonable grounds to believe he bears responsibility for war crimes, specifically the unlawful deportation of…”
6un.orgGovernment
un.org
Backs: “International Criminal Court (ICC) Actions: The ICC has issued multiple arrest warrants related to the conflict, including one for Russian President Vladimir Putin, citing reasonable grounds to believe he bears responsibility for war crimes, specifically the unlawful deportation of Ukrainian children.”
7un.orgGovernment
un.org
Backs: “International Criminal Court (ICC) Actions: The ICC has issued multiple arrest warrants related to the conflict, including one for Russian President Vladimir Putin, citing reasonable grounds to believe he bears responsibility for war crimes, specifically the unlawful deportation of Ukrainian children.”
8mid.ruNot yet classified
mid.ru
Backs: “The Russian government, led by Vladimir Putin, has presented several security, historical, and humanitarian arguments to justify its "special military operation." Each of these claims has been met with strong counterarguments from Ukraine, Western nations, and international legal experts:”
9fidh.orgNot yet classified
fidh.org
Backs: “In 2024, the ICJ accepted jurisdiction to rule on Ukraine's "reverse compliance" claim (to officially declare that Ukraine did not commit genocide), while previously emphasizing that Russia could not use false claims of genocide as a legal loophole to justify an invasion.”
10wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “From the perspective of international law, the UN, and major global judicial bodies, Russia's military action in Ukraine is an unlawful war of aggression. 1.”