Hello Jefferson --
This is an interesting question, as is really anything involving the multiverse beyond the "normal" quantum thing.
This is what I call the normal quantum thing, in the sense of organic growth and evolution:
1) the subset of infinities in each moment that are available to each of us (i.e., a constrained subset of infinity is available to me in each moment regarding my choices and outcomes in each moment) and
2) more broadly to this instance of our universe (i.e., a constrained subset of infinity is available to the universe in each moment regarding action/root cause and reaction/outcome). With each new moment arising from the field yet simultaneously connected to and contiguous with all prior moments. This can be viewed as moving across very similar alternative realities, some of which are more or less likely and one of which comes into being at each moment. The general quantum thing. Which as it applies in this sense is what I call the "normal" quantum thing.
When I say moment, we may take that as Planck moments or we may speak more broadly of quantum awareness beyond (or, occurring instantaneously across) time and space. But in this (our) instance of the physical universe, materiality is bounded by time and space. Which means, an alpha and an omega. Only consciousness or spirit is ultimately unbounded by time and space and materiality more broadly. But the multiverse involves materiality as well as consciousness...or at least it does for some portions, like our own universe and our own incarnated life forms and similar.
The thing is...if Mandela is alive now when before he was dead, or if Elvis were alive now when before he was dead (etc)...then this would be a different instance of our universe. And I don't mean it would simply be a different outcome of all our consecutives infinities in each moment.
No, that would be a casting of an entirely different instance. But it would be an instance that is necessarily still very similar, similar enough to hold all the energy that occurs when one instance is gone and another comes into being. The casting comes from a higher dimension, at least a few dimensions higher. It's more of a brute force movement, a necessary one like breathing, to contain the energy. So, it is meant to be an equivalent place, and we can see that humanity still have all our same core problems and challenges as we did in the other instances. But now, somehow Mandela didn't die in the 80s etc. and some other random stuff is different.
This is different to the smooth evolution of our constrained infinities, where over time you transform very deeply...you being a person, humanity, the earth, the universe, or the multiverse. If you (a person) begin to take conscious choices in each moment, you may see profound change within your lifetime
That's why it is also said that ultimately (and not just in politics) all things are local...local to this universe, to this earth, to this humanity, and to you personally.
I will check out your link when I have time & thanks for your thoughts. I wasn't sure what your thoughts were about the alien connection but I did see all the interesting stuff on the multiverse.
Peace & blessings
7L