I had a weird dream last night, in which I was escaping on foot and via improvised vehicles built from junk, from terrorists, or maybe an invading army, who may or may not have been zombies, through a ruined city that also had some very picturesque suburbs; in one of these suburbs, I was invited into a garden party where the hosts offered to make my dog immortal.
The other members of my group (people I don’t recall from real life, but in the dream, appeared to be close friends) were all for it, but I had a pang of conscience. Would it even be right to make my dog immortal?
The process involved nanomachines that would be injected into the subject and would, over a period of time, replace parts of the subject’s body that were about to wear out - including neurons - and it would do this seamlessly - basically an upgraded, robust and practically perfect version of the mechanism of the natural, but fallible, cellular repair process that many organic entities already have.
Suffice it to say, I was happy enough to accept that this process would not destroy the dog and merely replace it with a copy or a philosophical zombie (those are other debates, not this one). I was convinced that this process would, as promised, confer the property of practical immortality on the dog.
The dog could still be killed by massive sudden trauma or poisoning, or whatever - this is preservation against disease and natural forms of death, not absolute invulnerability, although there was an enhanced package available where I could buy a subscription where the nanomachines would upload the configuration as a continuous stream, and this would mean the dog could be recovered from backup, but again, I digress.
My misgivings were mainly of the form: is it right for me to make this animal immortal - the outcome of that will be that the dog outlives its normal lifespan - sure, it never experiences the frailty of old age, but also misses out on that pleasant gentleness and sweet afternoon-nap tiredness that also comes with age, and is not necessarily a bad thing.
It means that the dog would outlive me (the immortality treatment was only available for dogs) and have to watch me, and everyone else die, and presumably be passed on to another keeper, who would also die, and so on.
Now, I don’t think this predicament is necessarily bad, and I don’t think it would necessarily be a bad thing for someone to accept as an informed choice, or indeed, reject if they so desired.
But is it ethically OK to impose that on a being that cannot express the choice? Should I make my dog immortal if I can?