The document discusses the history and evolution of the thriller genre from its origins in the 1920s to modern times. It explores how thrillers first focused on creating feelings of emotion and suspense through films like The Lodger in the 1920s. During the 1960s-1980s, thrillers became bolder and more violent with films like Psycho and Frenzy. In the 1990s, common thriller themes involved obsession and detectives hunting serial killers, as seen in films like The Silence of the Lambs. Modern thrillers continue to draw from different eras while also focusing on crime and terrorism.