Simple. True empathy for everyone. Literally feeling what others feel
So every time someone stubs their toe, every other human would feel the pain? Everyone would be completely overwhelmed by all kinds of feelings all the time.
Remove the ability of carbon dioxide to act as a greenhouse gas.
Pooof, we all freeze to death.
Still makes the world better, just not for humans ¯\_(ツ)_/¯
Only if you like cold barren rock, there’s plenty of those already - isn’t it nice to have an interesting one with lots of stuff happening?
As an American, one of the most positive things that could happen to the world is the abolishment of the United States as a government. We’re directly or indirectly responsible for most of the ethnic cleansing that has gone on the last several decades.