Order implies a proper beginning, arrangement, progress, and a definite ending. In narrative, including all stories whether in prose or verse and also the drama, there should be traceable a Line of Action, comprising generally: (1) an Introduction, stating the necessary preliminaries; (2) the Initial Impulse, the event which really sets in motion this particular story; (3) a Rising Action; (4) a Main Climax. Sometimes (generally, in Comedy) the Main Climax is identical with the Outcome; sometimes (regularly in Tragedy) the Main Climax is a turning point and comes near the middle of the story. In that case it really marks the beginning of the success of the side which is to be victorious at the end (in Tragedy the side opposed to the hero) and it initiates (5) a Falling Action, corresponding to the Rising Action, and sometimes of much the same length, wherein the losing side struggles to maintain itself. After (6) the Outcome, may come (7) a brief tranquilizing Conclusion. The Antecedent Action is that part of the characters' experiences which precedes the events of the story. If it has a bearing, information about it must be given either in the Introduction or incidentally later on. Sometimes, however, the structure just indicated may not be followed; a story may begin in the middle, and the earlier part may be told later on in retrospect, or incidentally indicated, like the Antecedent Action. If in any narrative there is one or more Secondary Action, a story which might be separated from the Main Action and viewed as complete in itself, criticism should always ask whether the Main and Secondary Actions are properly unified. In the strictest theory there should be an essential connection between them; for instance, they may illustrate different and perhaps contrasting aspects of the general theme. Often, however, an author introduces a Secondary Action merely for the sake of variety or to increase the breadth of his picture--in order to present a whole section of society instead of one narrow stratum or group. In such cases, he must generally be judged to have succeeded if he has established an apparent unity, say by mingling the same characters in the two actions, so that readers are not readily conscious of the lack of real structural unity.