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It seems complicated, but it isn't. Even the word act is misleading, because you can have a one-act play, with an entire drama taking place in that one act. That's an artificial structure. A true ...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/29495 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
It seems complicated, but it isn't. Even the word _act_ is misleading, because you can have a one-act play, with an entire drama taking place in that one act. That's an artificial structure. A true story structure, also called classical drama, has three parts. First, the antagonist changes the protagonist's world in some way. Second, the protagonist confronts the antagonist. Third, the protagonist reclaims his old world or finds a way to survive in his new world. You can compare this paradigm to Hegel's thesis/antithesis/synthesis or a hundred others, but that's the gist. A poor drama will try to distract you with side trips, hesitations, emotion, spectacle, or tropes of the genre, with countless variations. At bottom a story has to have a moral of some kind, a lesson that the protagonist learns. Without it, a storyteller is wasting your time. And yes, sometimes all you want is to have your time wasted. The five-act structure is really an elaboration of the three-act structure, as seen [here](http://www.storyboardthat.com/articles/e/five-act-structure). Act 1 is Exposition, which introduces the setting, the characters, and the conflict. Acts 2 and 3, Rising Action and Climax, show the conflict playing out. Acts 4 and 5, Falling Action and Denouement, show the results. Thesis, antithesis, synthesis. The Hero's Journey, a further elaboration, adds several more steps, but they don't contribute to the basic story. As seen [here](http://www.movieoutline.com/articles/the-hero-journey-mythic-structure-of-joseph-campbell-monomyth.html), you can break this structure down into the same three parts. The most important thing is to tell a good story. Audiences will notice if you take a paint-by-numbers approach, that is, follow a pattern without thinking of the overall effect. Others can come behind you to classify, analyze, and parse it to death. Be a writer and the rest will take care of itself.