This document discusses the horror genre in film. It defines horror films as those meant to elicit negative emotions like fear by preying on primal fears through plots involving evil forces intruding on everyday life. Common horror elements include ghosts, monsters, and serial killers. While some of the earliest examples date back to the 1890s, the genre evolved over the 20th century and can provide societal benefits when used resourcefully. The purpose of horror films is to frighten and alarm audiences in a cathartic experience, by making them feel the same emotions as characters. Examples of classic horror films from the 1930s-1960s and more recent films from the 2000s-2010s are also listed.