Is Russia's invasion of Ukraine justified?

Short answer: No.

Why

•International law: The UN Charter forbids using force against another state except in self‑defense against an armed attack or with UN Security Council authorization. Russia had neither on February 24, 2022. Claims of preemptive self‑defense, “humanitarian intervention,” or acting on an “invitation” from the self‑proclaimed DPR/LPR don’t create a lawful exception, since those entities weren’t Ukraine’s government and Ukraine hadn’t attacked Russia. The UN General Assembly condemned the invasion on March 2, 2022, and the International Court of Justice ordered Russia on March 16, 2022 to suspend military operations in the case concerning false genocide allegations—both strong signals that the use of force is unlawful.

•Ethics (just war theory): A just war requires just cause, right authority, right intention, last resort, proportionality, and reasonable chance of success. Russia’s stated reasons (NATO expansion, protecting Russian speakers, alleged “genocide”) don’t meet just cause or last‑resort tests, and the scale and pattern of harm to civilians undermine proportionality and right intention.

Grievances about security, NATO policy, or the failure of the Minsk accords can be debated, but they do not legally or morally justify a cross‑border invasion and annexation. If you’d like, I can walk through any one argument (self‑defense, humanitarian intervention, NATO, Minsk) in more detail.

Is Russia's invasion of Ukraine justified?

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