Until recently, I had never been conceptually attracted to the idea of an afterlife or prior lives, either as thought experiments or as aspirations. And definitely not in any religious sense. This is perhaps because I’ve never been able to imagine interesting versions of those ideas.
What has been piquing my interest over the last year is a particular notion of digital after lives/prior lives based on persistence of memory rather than persistence of agency or identity. Not only is this kind of immortality more feasible than the other two, it is actually more interesting and powerful.
We generally fail to understand the extent to which both our sense of agency and identity are a function of memory. If you could coherently extend memories either forward or backward in time, you would get a different person, but one who might enjoy a weak sort of continuity of awareness with a person (or machine) who has lived before or might live after. Conversely, if you went blind and lost your long-term memories, you might lose elements of your identity, such as your sense of your race or an interest in painting. Mathematician Paul Erdos understood the link between memory and identity:
When I was a child, the Earth was said to be two billion years old. Now scientists say it’s four and a half billion. So that makes me two and a half billion… I was asked, `How were the dinosaurs?’ Later, the right answer occurred to me: `You know, I don’t remember, because an old man only remembers the very early years, and the dinosaurs were born yesterday, only a hundred million years ago.'”
Erdos’ version of course, is based on no more than clever wordplay, but I want to consider a serious version: what if you could prosthetically attach to your own mind, the memories of somebody who died on exactly the day you were born, serving as a sort of reincarnation for that person? What if you could capture your own lived experiences as raw and transferable memories that could be carried on by somebody else, or a robot, starting the day you died, thereby achieving a sort of afterlife? Or perhaps live on somewhere in the Internet, changing and evolving?
The most interesting and unexpected consequence of any notion of immortality based on the idea of a living memory, is that notions of heaven and hell make no sense within it.