Sensations, thoughts, and feelings of anxiety can result from being physically ill, or living in stressful, dangerous environments. Our concern here is with people who don’t feel well despite being in materially safe situations. Such individuals use repetitively invalid concepts to interpret reality. This usually causes overestimations of threats to security, anxiety, reduced mental competence, and poor decision making. In a smaller proportion of people, the tendency to underestimate risk is the psychopathology.