Quantum Immortality. Basically, if you keep splitting and you make an assumption like "My perception of the world is relative to me", then when a split causes y

Quantum Immortality. Basically, if you keep splitting and you make an assumption like "My perception of the world is relative to me", then when a split causes you to die you don't really split - because you must ignore branches where you don't exist. So then your view always follows the branching path where you live and you should expect to live 1M years from now. If there is only one world you shouldn't expect that.