The most obvious is the 1986 Chernobyl event for me.
So actually, I just let Stalin die. I think I’ll world-build in an explanation that’ll make sense naturally in the context of everything else going on, but fundamentally change nothing. The actual change I’m putting in related to Stalin is that the Soviet-sino split actually goes in the opposite direction and the USSR undergoes Restalinisation shortly after the Soviet-sino split. My actual narration is set in the 1980s.
If I recall after Khrushchev there were a few movements to restore Stalin’s legacy all the way up to Andropov.
Here’s some reading on it
https://twitter.com/After__History/status/1657177824933847041
