Considering we can’t even get heads or state or imagining-they’re-heads-of-states to not:
Wage war on neighboring countries.
Try to usurp their own government.
Promote wild conspiracy theories.
Be ragingly against personal freedom even in the US, the countries that is supposedly all about that.
Be ragingly anti-intellectual.
… I really have exactly zero hope we can do shit-all about climate issues. We can’t even handle far smaller and far more benign (by comparison) issues on a national level, what hope do we have to handle things that require everyone to pull in the same direction, on an international one.