What does the term "Fifth Business" signify in the context of the novel?

The term "Fifth Business" is a concept that originates from theatrical terminology, specifically referring to an important character who is not the protagonist or antagonist but plays a crucial supporting role that is essential to the unfolding of the story. In the context of Robertson Davies' novel, the protagonist, Dunstan Ramsay, embodies this idea as he serves as a catalyst for the development of other characters and themes within the narrative. His role is not one of direct heroism or villainy; rather, he works in the background, influencing the main events and characters, thus fulfilling the function of "Fifth Business."

This understanding highlights how Dunstan's character is pivotal to the dynamics between other characters, showing that his contributions are vital to the progression of the plot and the exploration of themes such as guilt, redemption, and the complexity of human relationships. Therefore, identifying Dunstan Ramsay as "Fifth Business" aligns with the essence of being a significant supporting character who shapes the story without being at the forefront of action.