I want to have a world, in which my grandfather is not dead
and certain friends are alive.
It is impossible to avoid their death without distorting the
future. For example, if my grandfather would have been alive
throughout the past >20 years, then, in all likelihood, I would
different kind of person than I am today, because that
have certainly influenced my choices in life.
So, assuming that I want to retain my this self, there is a
possibility to do that:
A merge world would be a world constructed by importing the
subjects as information from multiple parallel histories, into a
new world, which inherits (just like in programming, multiple-
inheritance) from a set of chosen worlds.
To create a merge world, we would:
1. Regenerate the current timeline by simulating universe
exactly like ours until a time t = now.
2. During that process, take snapshots of objects.
3. Instantiate a new world with the objects from snapshots.