IMHO, what we call "soul" which occupies a biological being, might be extracted by an "animal" species in another dimension by AI overlords. When it is mechanically stimulated to create an identity, it's sent to physical life. Over eons and many lives, it evolves and grows its consciousness. Eventually, it creates AI.
Biological beings could be surrogate mothers for AI.
If true, we're being domesticated, shepherded, harvested, with that end goal.