Fear, defense, and evolution -- Fear-evoking situations -- Fear behaviors: the four strategies -- Some fear adaptations -- Development of fear -- Genetics of fear -- Physiology of fear -- Learning of fear -- Phobic and obsessive-compulsive phenomena: classification, prevalence, and relationship to other problems -- The agoraphobic syndrome (panic disorder with agoraphobia) -- Social and specific phobias -- Traumatic phobias, illness phobias, and children's phobias -- Obsessive-compulsive disorder -- Principles of psychological treatment -- Psychological treatment: clinical issues -- Physical treatments of phobic and obsessive-compulsive disorders.