Most people, when asked what they are most afraid of, answer: “I’m not afraid of anything.” This answer is not true, since every person at one time or another experiences some kind of fear. Some of the most obsessive fears are fears of irrational and otherworldly forces. Jean Delumeau and James Fraser in their works analyze precisely such fears, characteristic of the entire history of mankind. The horror of ghosts, the living dead, witches and sorcerers, the devil and demons has long dominated society, and it continues to live today. Jean Delumeau and James Fraser, from different points of view, show the evolution of this horror, make an attempt to identify it, and also to find out the reasons for its extraordinary persistence.