My other problem is: OK, we are now (in twenty years time) immortals.
I suspect that's a highly optimistic timetable, and "negligible aging" is not "immortal" by a long shot. But for the sake of argument....
It costs a lot of money to maintain immortality.
At first, yes. Depending on the technology, it will almost certainly get (by first world standards) progressively less expensive as time goes on.
Obviously rich nations can provide it, but as you can see with health care, even in rich nations it probably won't be universal.
Almost certainly true. Aubrey deGrey is optimistic that since treating age-related illness is expensive, it will be publicly paid for.
Leaving aside the policy argument for the time being, I'm not convinced that's true. I think it depends on the form the therapies take. If it's something you have to see tons of doctors and sink lots of time and resources in, no. If it could be delivered by a near-ubiquitous swarn of nano-whatsit machines at low cost, then *maybe* not. But the former's much more likely that the latter for a good long time, yes.
So there are the immortals and on the other side the poor mortals.
Certainly for the first few generations of the technology. Longer with legal restrictions, which may well pop up.
Can you imagine the envy of mortals? Can you predict the rage after some people (possibly hundreds of millions of people) will be denied of eternal life?
Oh, I'm sure the envy (and in some cases rage) would be intense. But see below.
If you have the technology of immortality, to deny it from a human means to kill that human being.
The same could be said of any number of life-sustaining resources. It's a morally admirable thing to donate to a food bank, but you're hardly culpable of murder if you prefer not to spend your entire paycheck on African famine relief.
So either there is a Utopian society on Earth with unlimited resources or immortality will star the mother of all civil wars.
How realistic is a Utopian society? How can a society work without competition?
Isn't the technological singularity a "communism 2" project with more technobabble?
To repeat, we're
already in that position. We
already live in a heaven hardly imaginable by our ancestors, and have a standard of living many people in many parts of the world truly can't comprehend.
As an example... "Gluttony" isn't on the list of "Deadly Sins" because the medieval church didn't want parishioners getting fat... it made the list because eating like a pig put you and your family in dire risk of
starvation over the winter. There are prayers and writings from the time to the effect of "it would be
heaven to live in a place where you could eat all you wanted, and not have to worry."
And now we have that. And most people don't give it a second thought.
And the people who STILL don't have that, almost a thousand years later?
This will sound harsh... but help them or not (and blessedly, we do - within the limits of what their culture and ours can handle) - they're hardly in a position to damage the first world.
I don't expect that to change much. Mostly because the technology required for any kind of meaningful life extension also implies a defensive technology to match. If you have machines that can get inside a cell to fix damage, you have machines that can sniff out fissionable material and eat circuit boards to deactivate homemade nukes.
None of which means it would be a wise idea to walk alone though downtown (whatever-that-era's-equivalent-of) Mogadishu showing off your bling, or that there wouldn't be sporadic outbursts of non-state violence here and there.
Again, I truly do foresee an "elves and orcs" (or at least "elves and men") cultural division for a time. How long that lasts depends on how easily "cloudable" the technology can be made, and what political strictures the "elves" of the time may put into place to restrict its development. The classic "it's okay for me and my kind, but I don't want the little people able to afford it." ... and of course assuming there's no Roman-Empire like collapse of the Western world.
Regardless, it's going to be an interesting ride.
The more of this stuff I look at, the more it feels like living in the opening years of the Renaissance. This is gonna be fun. What a fascinating time to be alive. You know, someday there are going to be historical reenactors dreaming about this period and wondering what it was like to live now.
As to the "technological singularity," personally I find it too nebulous a term - seems everyone has a slightly different idea of what exactly it entails, and at times it sounds frustratingly close to magic. Kind of like "nanotechnology."