trilogy
A trilogy is any dramatic work composed of three parts. While some film trilogies existed before Star Wars, creator George Lucas is credited with popularizing this format in the industry. Since the success of Star Wars, blockbuster film franchises like Spider-Man, The Matrix, and Lord of The Rings have released sequels in bunches of three.
In the case of Star Wars, we actually have a trilogy of trilogies. Often, the nine main films are often referred to as a saga, specifically the Skywalker saga. A saga is “a legend of heroic exploits” or “any very long story with dramatic events or parts.” Over the course of the nine movies, the film focuses on members of the Skywalker family (Anakin, Luke, and Luke’s nephew, Kylo Ren), and they definitely feature heroic exploits and dramatic events.
The history of trilogies dates way back to ancient Greece. During the extravagant festival of Dionysia, playwrights and actors would put on performances to honor the god Dionysus. Usually, three interrelated plays were performed over the course of the festival in addition to one satyrical or comedic performance. The satyr would complete what’s known as a Greek tetralogy.