Dystopia refers to an imagined place or state that is unpleasant or bad, often featuring a totalitarian or environmentally degraded society. Technological progress often evokes both hope and fear about the future. Popular elements of dystopian themes in fiction include citizens living under harsh control by corporations or technology, the truth being kept secret, stories taking place after apocalyptic events, maintaining the illusion of utopia through propaganda, and protagonists questioning those in power. Common dystopian themes deal with technology taking over or the importance of knowledge and truth. Examples given are the films Mad Max: Fury Road, set in a post-apocalyptic world ruled by an evil man with scarce resources, and WALL-E