Cannibalism, the act of eating human flesh, is a recurring theme in popular culture, especially within the horror genre, and has been featured in a range of media that includes film, television, literature, music and video games. Cannibalism has been featured in various forms of media as far back as Greek mythology. The frequency of this theme has led to cannibal films becoming a notable subgenre of horror films. The subject has been portrayed in various different ways and is occasionally normalized. The act may also be used in media as a means of survival, an accidental misfortune, or an accompaniment to murder. Examples of prominent artists who have worked with the topic of cannibalism include William Shakespeare, Voltaire, Bret Easton Ellis, and Herschell Gordon Lewis.