Fantastic post. I think it remains to be seen if we will survive or ultimately be consumed by our own aggression to the point of destruction. It may well be an evolutionary paradox that species that are successful enough to dominate a planet eventually destroy themselves. I hope not.
That is almost certainly going to happen, whether through war, environment or sheer shortage of resources. There's no choice there - become a space faring civilisation or face a long, painful decline on Earth.