This suggests that the need to be accepted as part of a social group is as important to humans as avoiding other types of pain, she said. Just as an infant may learn to avoid fire by first being burned, humans may learn to stick together because rejection causes distress in the pain center of the brain, said Eisenberger.
I wonder whether the pain of social exclusion is not related to withdrawal symptoms from substances such as nicotine or heroin; that is, whether or not social interaction triggers neurochemicals that are addictive. People have been addicted to all sorts of activities, from risk-taking to sex; could it be that we're all social-interaction junkies from birth?
Another question this raises is that of substitutes for social inclusion that keep the same happy chemicals flowing without needing to actually have a social life; for example, internet chat rooms, multi-user roleplaying games (in which people have experienced serious attachment to virtual characters), even long-distance "romances", could be a way of "masturbating" the social-inclusion parts of the brain without the need for real social interaction. Perhaps that's one of the end goals of AI: to produce software that can pass the Turing test and provide simulated social interaction for instant-gratification-dependent cube-hermits without enough time in their high-speed, information-overloaded lives to develop real relationships with other people.
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