If you want to believe news reports Prf. James Lovelock think we are too stupid to stop climate change.
What he actually said was
"I don't think we're yet evolved to the point where we're clever enough to handle as complex a situation as climate change, the inertia of humans is so huge that you can't really do anything meaningful.”
He also said
“What I like about sceptics is that in good science you need critics that make you think: 'Crumbs, have I made a mistake here?' If you don't have that continuously, you really are up the creek.”