"Many Worlds" and Personal Immortality Let's say that the "many worlds" interpretation of quantum theory is correct. Let's also say that there is no afterlife, and that at death consciousness would simply end. So no one will ever experience anything after death. From the timeline of any person's consciousness, the period after death is simply an impossibility. Therefore my consciousness will--and can--always choose a path through the "many worlds" universe where I do not die. So I am immortal. Even though much evidence indicates that people die, these people who die are not conscious beings _within my consciousness timeline_. From my perspective there is no sound reason to believe they are conscious. Indeed, the fact that they die is evidence that they are _not_ conscious. If consciousness other than mine does exist, it must obey the same rule, and never die. Therefore it will probably take a different path through the many worlds. If other conscious beings are present in my world right now, most likely they will eventually take a divergent world, undetectably, leaving behind an no-longer-inhabited simalcrum which acts just like they did.