Story: Style, Structure, Substance, and the Principles of Screenwriting

by Robert McKee

In essence, the protagonist creates the rest of the cast. All other characters are in a story first and foremost because of the relationship they strike to the protagonist and the way each helps to delineate the dimensions of the protagonist’s complex nature. Imagine a cast as a kind of solar system with the protagonist as the sun, supporting roles as planets around the sun, bit players as satellites around the planets—all held in orbit by the gravitational pull of the star at the center, each pulling at the tides of the others’ natures. Consider this hypothetical protagonist: He’s amusing and optimistic, then morose and cynical; he’s compassionate, then cruel; fearless, then fearful. This four-dimensional role needs a cast around him to delineate his contradictions, characters toward whom he can act and react in different ways at different times and places. These supporting characters must round him out so that his complexity is both consistent and credible.