There are, of course, many variants possible. The one I focus on is largely solipsistic, where all the people are generated by an AI. Keep in mind that AI needs to fully emulate only a handful of personas and they're largely recycled in transition to a new world. (option 2, then)
I can understand your moral reservations, we should however keep the distinction between real instantiation and an AI's persona. Imagine reality generating AI as a skilful actor and writer. It generates a great number of personas with different stories, personalities and apparent internal subjectivity. When you read a good book, you usually cannot tell if events and people in it are true or made up; the same goes with skilful improv actor, you cannot tell whether it is a real person or just a persona. In that way they all pass Turing test. However you wouldn't consider a writer killing a real person, when he ceases to write about some fictional character or an actor killing a real person, when she stops acting.
Of course, you may argue that it makes Waker's life meaningless, if she is surrounded by pretenders. But it seems silly, her relationship with other people is the same as yours.
My reservations aren't only moral; they are also psychological: that is, I think it likely (whether or not I am "right" to have the moral reservations I do, whether or not that's even a meaningful question) that if there were a lot of Wakers, some of them would come to think that they were responsible for billions of deaths, or at least to worry that they might be. And I think that would be a horrific outcome.
When I read a good book, I am not interacting with its characters as I interact with other people in the world. I know how to program a com...
This short text describes the idea of a Waker - a new way of experiencing reality / consciousness / subjectivity / mode of existence. Sadly, it cannot be attained without advanced uploading technology, that is one which allows far-fetched manipulation of mind. Despite that, the author doesn't find it premature to start planning a retirement as a posthuman.
A Waker is based on the experience of waking up from a dream - slowly we realize unreality of world we just were in, we realize discrepancies between dreamscape and "the real world", like that we no longer attend high school, one of our grandparents has had passed away few years ago, we work at a different place, etc. Despite the fact the world we wake up in is new and different, we quickly remember who we are, what we do, who are our friends, how does that world look like and in few seconds we have a perfect knowledge of that world and find it a real world, place, we have been living in since our birth. Meanwhile, dream world becomes a weird story and we typically feel some kind of a sentiment for it. Sometimes we're glad to escape that reality, sometimes we're sad - nevertheless we mostly treat it as something of little importance. Not a real world we lost forever, but rather a silly, made-up world.
A Waker's subjective experience would differ from ours in that way, she would always have the choice of waking up from current reality. As she would do that, she would find herself in a bed, or a chair, or laying on the grass, just having woken up. She would remember the world, she was just in, probably better then we usually remember our dream, nevertheless she would see it as a dream - she wouldn't feel strong connection to that reality. In the same time, she would start "remembering" the world she just woken up in. Somehow different then in our case, this would be a world she never had actually lived in, however she would acquire full knowledge of it and a sense of having spent all her life in that world. Despite all that, she would have full awareness of her being a Waker. She would find connection to the world she lives in different then we do and at first glance somehow paradoxical. She would feel how real it is, she would find it more real then any of the "dreams" she had, she would have investment in life goals, relationships with other people, she'll be capable of real love. And yet, she will be fully able to wake up and enter new world, where her life goals and relationships might be replaced by ones that feel exactly as real and important. There is an air of openness and ease of giving away all you know, completely alien to us, early XXI century people.
Worlds in which Waker would wake up, would have the level of discrepancies similar to those of our dreams. Most of the people would stay in place, time and Waker's age would be quite similar. She would be able to sleep and dream regular dreams, after which she will wake back in the same world she fell asleep in. What is important is that a Waker cannot get back to a dreamworld. She can only move forward, same as we do and unlike the consciousnesses in Hub Realities - posthumans who can chose the reality they live in.
I hope you enjoyed it and some of you would decide to fork into Waker mode of existence, when the posthumanism hits. I'd be very glad, if anyone have other ideas for novel subjectivities and would be willing to share in comments.
Yawn, it's been a long day - time to Wake up.