system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does social isolation screw humans up so badly?

Every week it seems like there's more studies released showing just how screwed up a person gets when they don't get adequate social interaction. Why would the brain essentially betray the person simply because there's nobody around? Why would everything break down simply because the person has nobody? And if social interaction is such an essential part of human survival, then why does it get harder to re socialize after long periods of isolation?
gpt
Humans are a social species. Without the strength of social groups, we would not be alive today. Since we almost always live in social groups, our brain has not evolved in a manner suited to living alone. Just as we are not great at living in a pond or in Antarctic conditions or going a month without water, these are just situations that are outside our normal operating parameters.