"Humans will try hard to survive", while undoubtedly true, isn't really a counter-argument. As a counter to your "humans are smart" theory, I would point out t

"Humans will try hard to survive", while undoubtedly true, isn't really a counter-argument. As a counter to your "humans are smart" theory, I would point out that we've known about climate change for half a century now and have done absolutely nothing about it: each year we are putting more CO2 into the atmosphere than the year before. We are accelerating into the apocalypse. If humans were smart as you suppose, wouldn't we have done something other than jam our feet on the accelerator?