It was a short but a fun scan though
[I usually don’t read but I scan for highlights to get ‘gist’ of things]
It sounds akin to David K. Lewis’ https://en.wikipedia.org/wiki/Modal_realism for philosophy.
In the end I prefer David Lewis’ model because it gives us the most graph paper to work with. I wouldn’t use it as an actual model but for working-space it can’t be beat.
All seemed to start with Erwin Schrödinger, 1952 for physics, and Kripke in the late 1950s for philosophy. But Gottfried Leibniz got the ball rolling hundreds of years ago influencing philosophy, which split off into natural philosophy (sciences) and philosophy.