Aristotle's unified plot stucture

Aristotle identified the basic linear plot stucture in 350 BC as a simple triangle of the beggining, middle and ending. He observed that the middle section might involve some form of crisis, resolved by the end of the story. In 1863the German novelist Gustav Freytag published pie technik des dramas in which he outlined his pyramid structure for his plot. Adapting Aristotles basic triangle he added the ideas of the plot complicating, introducing conflicts and building a climax point, after which it falls away as the conflicts are worked out, the mysteries solved and finally left him with a satisfactory resolution.