book by Daniel Kolak that attempts to show that there is exactly on person that we are all variations of. An extreme form of reincarnation theory, although also its inevitable conclusion. Reincarnation + Solipsism.
Have to say while I can kind of get the idea – if selves are fictions anyway, maybe they are all the same fiction, or chapters in a single mammoth story, the vagaries and vicissitudes of the One True Agent – this kind of enrages me. Personal identity might be an illusion but god damn it is my illusion and an attack on the reality of persons-in-general is felt by this person-in-particular.
I class it with the mind-destroying ideas. Such a spirit is necessarily abstract and the glory and minds of humans are bound up with their bodily and environmental specificity.
OTOH, it makes all of humanity closer than brothers, and in some respects a belief very like this animates the very mainstream and normal sentiment towards human universalism. Which I support, or maybe I just wish I did.