For climate change, is it a problem of intelligence though? We all know plastic is bad, but most of us don't care. Most of us know reducing meat consumption is a good thing (for environment and otherwise), but most of us won't entertain even reducing meat consumption, let alone going vegetarian. And so on. I don't think it is ignorance is as big a problem as "fuck you, I don't care" attitude

I'd wager what is needed more is kindness - to ourselves, to one another, to animals, to environment etc, more than intelligence.