Kendall Phillips, professor of communication and rhetorical studies at Syracuse University, New York, has spent decades researching controversy and conflict in popular culture. His books on the horror genre include A Place of Darkness: The Rhetoric of Horror in Early American Cinema; Controversial Cinema: The Films that Outraged America; and Projected Fears: Horror Films and American Culture. Here he talks about what we mean when we say horror; the evolving history of the genre; and the newest portals in cinema, including your own home.