I see a lot of discussions in this thread regarding who is at fault for this situation with a lot of groups being blamed and presidents being named. As someone living in a country that was part of the USSR, I can tell you all - Russia is the sole reason for this war. I don't care what is their casus belli to start a war. Its history is the reason why countries joined NATO, so Russia bitching about it, is them whining about what they have done to themselves, just like any proper tranny would do.
USSR is not a country any one of you would like to be a part of, so do not be surprised that people that know how it was, are now willing to die to not be a part of the new USSR.
As for who could have prevented it, I know someone who definitely could - Russia. And they chose to walk the same path as USSR. I can only pray that Ukrain is strong enough to stop them.