The document discusses the genre of psychological thrillers. It begins with a definition, noting that the emphasis is on character psychology rather than plot, and suspense stems from mental rather than physical threats. The history section then outlines several influential early psychological thriller films from the 1920s to the 1990s, directed mostly by Alfred Hitchcock. Significant events like World War II and the Cold War are described as inspiring authors and filmmakers. Conventions of the genre like themes of the mind, death, and identity are also summarized.