many worlds

Hugh Everett III's 1957 relative state formulation proposes that the wave function never collapses. Every quantum measurement branches the universal wave function into non-interacting copies — each containing an observer who sees a definite outcome. All branches are equally real. None is privileged.

The equations describe every branch at once, impartially. What they cannot say is why your experience runs down this one. The wave function is impersonal; being someone is not. Many-worlds removes the collapse and leaves the deeper question untouched — not which outcome occurs, but who is here to find it.