I am not, not being optimistic. I don't believe that most of the wealth that modernity has created is particularly meaningful. I think we can all be happy, indeed happier, with a lot, lot less. If we don't, then we're simply, selfishly, kicking the can down the road so that you're (and my) children will be in the position you are now wondering why their now deid da didn't recognise the coming disaster. I'm more concerned that my children will wonder why I believed the blatant fantasy of electric cars, less flights and vegan processed food.
Edit: I hope it's obvious that I'm referring to myself too when I talk of selfishness and so on