We can go the other way and this feeling of detachment and contentment might be what we evolved away from, but as our systems and cognitive functioning deterior

We can go the other way and this feeling of detachment and contentment might be what we evolved away from, but as our systems and cognitive functioning deteriorate we return to this state. For instance take pain. People view pain as negative but it's of course a great positive from an evolutionary point of view. Not everything (or even everybody) experiences pain, but those that do are going to be vastly more likely to succeed in life than those that don't. Your reaction to recoil from pain is not because the interaction itself is painful but because you have evolved instincts that tell you that what you're feeling is likely detrimental to your health and the situation needs to be resolved instantly, on a subconscious, level. As your pain receptors shut down it would ostensibly feel pleasant, but in reality it would just be one of the most important, and useful, evolutionary tools we have turning off.