Why is An Inspector Calls split into 3 acts?

"An Inspector Calls" is structured into three acts to build tension and develop the narrative effectively. Each act introduces new revelations about the characters and their connections to the central theme of social responsibility, allowing the audience to gradually uncover the moral implications of their actions. This three-act structure also enhances the dramatic impact, culminating in a powerful climax and resolution that emphasizes the play's critique of individual and collective accountability.