Survival of our species/Intro
From AdCiv
There really couldn't be anything more important to us than the survival of our own species (though that is not to say other life isn't important too). It is ourselves and all future generations. However we currently have all our eggs in one basket which is a precarious situation – we live on this single world while under the shadow of various apocolyptic threats, both man-made and natural, that could destroy our current civilisation and even wipe us out entirely. To put it bluntly we are extremely vulnerable. Asteroids, virulent disease, global war with advanced weapons. All are possible and we must protect our future.
We've come a long way and gained irreplaceable culture and knowledge and it would be the most foolish thing in history to lose it at a time when we have the technology to do something about it. It's also about not messing things up for our descendants - it is not just about surviving but having good prospects, opportunities and a rich environment to live in. Far more likely than total annihilation of our species is the possibility of being knocked back to the Dark Ages.