Darwin's theory 1 . NDErs are helping humanity cope with death. A great percentage of NDErs are very reluctant to talk about their experience. Some NDEs are horrifying. Hallucination theory 1 .
Endorphins create hallucinations.
Hallucinations distort reality. People who have had both an NDE and a hallucination say they are not the same. Hallucinations often evoke fear and paranoia which NDEs generally do not. Lack of oxygen theory 1 . Lack of oxygen creates hallucinations.