I don't know. It's like a self preservation thing. But if the self is the ego, ultimately, and the purpose of biological life is to house the soul, wouldn't the ego not matter? So maybe people, by observing each other are enabling the soul to exist without the use of a body or ego. If that's true, it's the other side of the argument and we should all be walking around staring at one another. (that is if the ego would step aside and make soul existence more acceptable. But all peoples of Earth [or beyond] have to be in agreement to live on a soul-based level) I think that might be a big problem that most haven't discovered. (We should get world leaders to read this. LOL) "Mental Illness" must open us up to these things.