[davemp]

If you were to view people as a composition of their choices, then in the current branch every individual chose said branch. Every person who did not chose the current branch, is now a different individual.

If the universe is considered a set of individuals or object, then it's unclear whether a multiple paths could lead to equivalent universes or the same. It all depends on the category theory (is the composition of choices associative, etc).

That being said, I really don't like multiple/branching universes theories.