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Social networks bring in another dimension of stimuli: social pressure. People are keenly sensitive to social status, judgment, and competition. Unlike most animals, people are not only born absolutely helpless, but also remain so for years. We only survive by getting along with family members and others. Social concerns are not optional features of the human brain. They are primal. The power of what other people think has proven to be intense enough to modify the behavior of subjects participating in famous studies like the Milgram Experiment and the Stanford Prison Experiment. Normal, noncriminal people were coerced into doing horrible things, such as torturing others, through no mechanism other than social pressure.
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