And then do it again, for the next conquest? And then other dictators like Iran, North Korea and China do it as well?
Diplomacy could have stopped this war. Period.
How, exactly?
Putin on the other hand could stop this war at any time. Maybe you should direct your "diplomacy" message at him instead of at the "Western political circles".
LE: Don't forget this war started in 2014 with Russia's invasion of Crimea. And Russia was also the one who broke the Minsk Agreements, in 2022.
A lot of peoples lives could have been saved.
Maybe you don't know about the Minsk accords:
Unjustified unprovoked war and all that…
But, like now, nobody listened...
... didn't need to exist had Russia not invaded in the first place.
Russia set up on the border and invaded anyway because they are completely untrustworthy.
EDIT: Downvoted because "dead civilians are diplomacy", got it ..