I wanted to say "Like Korea, c1950" but I thought the term peace was due to be exercised. The Charter comes with an absolute right for self-defense, and also a policy of collective defense by Charter signatories against aggressor nations.
There is no legal right that Russia has to invade a sovereign nation, and doing so just because you happen to have nukes is no basis for global security.
Very good posts by both of you - Lonewolf50 and FDR - thank you.
I would also say it’s time to strip Russia if it’s Security Council seat. Ukraine might be a good candidate or Poland.