A Response to Stephen Hawking
It won't in any comfortable sense of the word.
You, Dr. Hawking, have proposed that humans must seed the universe with themselves during the next century so that when, I assume, the inevitable collapse occurs, there will be the equivalent of self-sustaining seed banks from which to begin again.
I suggest that's squandering the time and energy we have left. We have a place to live now in which we evolved - we are peculiarly suited to it and it to us. The likelihood of finding another such place is vanishingly small. We should make the best of what we've got. Besides, we've not had a good record when it comes to maintenance. Perhaps if our lives depended on it, our attitude might change. But I foresee dedication to maintaining a complex machine at the expense of almost everything else until its ultimate collapse or exhaustion of the raw materials required.
The first task is find a way to reduce the population to a level that can be sustained indefinately. Of the steps we have to take to assure our survival, that's probably one of the toughest. As we approach the question of how, we also need to decide how small a sustainable population is. I suspect it will be much smaller than we imagine. For one thing, we've already used massive amounts of the energy sequestered over millions of years. We've already pumped enormous quantities of ground water from aquifers that will required thousands of years to fill. And we may already have triggered a massive climate change that will affect how population will have to distribute itself. We've also put too many species on which we depend, and may have to depend in the future without the help of advanced technology, on the brink of extinction. We must adopt the attitude that the deepest well of genetic variation in all species is to our advantage. Reducing our population will help with that because we can return large tracts to "nature." Once we stop competing with most species, they will recover - but only if they are there to breed again.
You yourself spent some time in a future in which it appeared that profit was not the driving motivation behind human accomplishment. I suspect that utiopian condition really is needed to perpetuate ourselves. But how to do that while maintaining an interest in advancing our science, arts, and commerce without being overcome by complaicency is yet another thorny problem. Can we function without greed?
Yet another problem is choosing which of our existing technical accomplishments to preserve. I suspect we should keep them all. How? And how do we assure ourselves that critical skills are perpetuated in the event we mis-calculate and run out of time before the collapse begins? We can't simply stop reproducing because we'd end up with a uniformly old last generation. That requires that we allow only enough reproduction to populate that sustainable number of people. Then we train them in a wide variety of skills. Solomon, where are you when we need you.
I suggest that the most practical way is do most of what has to be done, is to insist of ourselves that we become capable again of caring for ourselves. How many people can actually grow and harvest a crop? How many people can breed and husband livestock? How many people have the skill to house themselves? We must choose to become more self-sufficient and generally adept at survival. That's the way I live now, and I can tell you it's comfortable, challenging, and satisfying. It even leaves me time to do this kind of thing.
On the other hand, we don't need to give up everything. I'm quite satisfied to converse with you remotely. It is not necessary for me to be in the same room or on the same continent for us to have a meaningful exchange. We must choose the cheapest way of having commerce of all kinds.
But if we fail, earth will recover on her own. It will repopulate itself. It is even likely that a few homo sapiens will survive and contribute, in some way, to the next round of evolution. That may not be so bad, in the long run. In the past, I've lamented the probable loss of those things we (I) consider beautiful and meaningful. But those are things I've been familiar with and to which, in a small way, I've contributed. Even the loss of those things may not be such a tragedy. Each society should have the right and obligation to celebrate itself, amuse itself, in its own way.
And that brings me to my last point:
In the past, what we call "great civilizations" have had roughly 250 years, give or take, to organize themselves, reach maturity and then decline and be subsumed by neighbors. It may be that that formula no longer applies simply because we're no longer separated by geography. Our industrialized components have global reach. We may all decline at the same time. We have no experience at that.