In my mind this is just like entropy in action. We hit the exponential growth curve and we're going to cull ourselves out of our environment, taking other things out with us or before us because humans dominate that much of nature at this point. Just seems like an unstoppable force. As far as I know exponential growth curves lead to something like that in all animals independently of their behavior because Darwinian adaptation in animals is much slower than the decline caused by exponential growth.