Explaining the functional seduction of horror entertainment, this book draws on cutting-edge findings in the evolutionary social sciences, showing how the horror genre is a product of human nature. Integrating the study of horror with the sciences of human nature, the book claims that horror entertainment works by targeting humans' adaptive tendency to find pleasure in make-believe, allowing a high intensity experience within a safe context. Through analyses of well-known and popular modern American works of horror--Rosemary's Baby; The Shining; I Am Legend; Jaws; and several others--author Mathias Clasen illustrates how these works target evolved cognitive and emotional mechanisms; we are attracted to horrifying entertainment because we have an adaptive tendency to find pleasure in make-believe that allows us to experience negative emotions at high levels of intensity within a safe context. Organized into three parts identifying fictional works by evolutionary mode--the evolution of horror; evolutionary interpretations of horror; the future of horror--Why Horror Seduces succinctly explores the cognitive processes behind spectators' need to scream.