The document discusses Aristotle's definition and analysis of tragedy. It explains that according to Aristotle, the key elements of tragedy are the plot, characters, thought, diction, melody/song, spectacle, and ending. It then analyzes how Chinua Achebe's novel Things Fall Apart fits Aristotle's model of tragedy, finding that the novel adheres well to Aristotle's concepts of plot, characters, thought, and diction in particular.