Narrative structure, a literary element, is generally described as the structural framework that underlies the order and manner in which a narrative is presented to a reader, listener, or viewer. The narrative text structures are the plot and the setting. Narrative structure, a literary element, is generally described as the structural framework that underlies the order and manner in which a narrative is presented to a reader, listener, or viewer. The narrative text structures are the plot and the setting. Narrative structure is about story and plot: the content of a story and the form used to tell the story. Story refers to the dramatic action as it might be described in chronological order. Plot refers to how the story is told. Story is about trying to determine the key conflicts, main characters, setting and events. Plot is about how, and at what stages, the key conflicts are set up and resolved. The setup (act one) is where all of the main characters and their basic situations are introduced, and contains the primary level of characterization (exploring the character's backgrounds and personalities). A problem is also introduced, which is what drives the story forward. The second act, the conflict, is the bulk of the story, and begins when the inciting incident (or catalyst) sets things into motion. This is the part of the story where the characters go through major changes in their lives as a result of what is happening; this can be referred to as the character arc, or character development. The third act, or resolution, is when the problem in the story boils over, forcing the characters to confront it, allowing all the elements of the story to come together and inevitably leading to the ending. First described in ancient times by Greek philosophers (such as Aristotle and Plato), the notion of narrative structure saw renewed popularity as a critical concept in the mid-to-late-20th century, when structuralist literary theorists including Roland Barthes, Vladimir Propp, Joseph Campbell, and Northrop Frye attempted to argue that all human narratives have certain universal, deep structural elements in common. This argument fell out of fashion when advocates of poststructuralism such as Michel Foucault and Jacques Derrida asserted that such universally shared, deep structures were logically impossible. In Frye's Anatomy of Criticism, he deals extensively with what he calls myths of Spring, Summer, Fall, and Winter: