Abstract
Most of people live in an community in their daily life. However, since the dark side of human nature exists in everyone’s mind, people living in an community can be deindividualized by triggering and flourishing the evil existing in people’s hearts, emphasizing obedience, and creating an “enemy” for community members. People would rationalize their immoral behaviors to escape from the feeling of guilt and regret. As a result, the savagery in human nature is triggered and normal people in a community are transformed to sociopath.