What is the author's style in Inherit the Wind by Jerome Lawrence?

At the beginning of Act ffl, before the jury returns with the verdict, Drummond muses aloud about Golden Dancer. As a child, Drummond had seen a brightly colored rocking horse in a store window, and his parents, through extra work and sacrifice, bought the toy for the young Drummond as a birthday present. When he jumped on it to start to ride, the horse broke apart. "The wood was rotten, the whole thing was put together with spit and sealing wax! All shine and no substance." This brief monologue suggests why Drummond takes on "unpopular" cases. "If something is a lie," Drummond tells Gates, "show it up for what it really is!" By illustrating this point with a story rather than by simply having Drummond make a blanket statement, the playwrights direct the viewer/reader's attention to the idea behind the action.