Gregor Zilsten a neurology, and psychiatry department. With his experiment which intricate involvement of electric shock. The final conclusion, is people are anxious. There must be misery love company. Since birth, we were connected to our caregivers. Suppose, as the baby grows older into an adult age. The adult is in a solitary confinement with not contact of other humans (civilization). The adult is going to feel anxious except turn into internal past memories for guidance. I,e, The brain is in idle mode. The past is history, new information is go to forward. The mind, brain, is lookin for new information for absorbs. The anxious brain, mind, is looking for maturity in new connection. Furthermore, instead of mourning of the past, it is best for look for new external connection for maturity, and growth.