I’ve heard of people with near death experiences having these calm, soothing experiences. It’s lovely that our brains do this for us.
I know there’s a natural selection, those with the best characteristics continued, and those who didn’t have the qualities to survive would pass away. But everyone dies in the end. What made it so that all brains release those chemicals to ease our last moments?
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While I do not know if this is true, there is another possible reason for this. Evolution often selects for genetics that are good for a species, not necessarily an individual.
You are living in a tribe in the stone age. A big bad thing is happening. A battle, flood, tsunami, earthquake, or fire.
You are in terrible danger or a great deal of pain. You scream for help. Your fellows risk themselves to help you. If many people are screaming they have confusion, tough choices, and just horrifying distractions everywhere that can get them killed. If they rescue you, they may be sacrificing someone else who has a better chance, or even sacrificing people who were in no danger at all if not for rescuing you.
Your screaming for help or in pain is a survival mechanism for you. For a society is a survival mechanism that people help other members of that society or species who are in pain or danger. But both of these can be a detriment to others if you are not going to make it anyway.
If you are convinced that you are definitely going to die even with help, it might be best for everyone else if you just shut up and get on with it.
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