Ukraine in NATO in 1997 would prevent this war, Russia was in no shape to invade anyone, still dealing with Chechnya
There was zero chance of NATO accepting Ukraine in 1997 as anybody who has any clue at all understands. Meanwhile, what would’ve actually prevented this war was for Ukraine to declare neutrality and renounce NATO ambitions. That option is certainly going to look pretty good when this is all over.
The Baltics joined NATO in 2004, Russia did nothing despite long control over the region and a large Russian minority. Had Ukraine been in this position the whole war could have been avoided, since Russia would not invade a NATO country