The Inspector: Voice of Social Conscience
The Inspector's dramatic entrance immediately shifts the play's atmosphere from "pink and intimate" to "brighter and harder" - symbolising how his socialist message threatens the Birlings' comfortable capitalist bubble.
His interrogation technique evolves throughout the play. Starting "carefully, weightily," he maintains professional calm whilst gathering information. However, as the family's lack of remorse becomes clear, he becomes more forceful and threatening, warning them "you're making it worse for yourself."
The Inspector's prophetic final speech predicts terrible consequences if society doesn't change: "if men will not learn that lesson, then they will be taught it in fire, blood and anguish." This hellish imagery would have resonated powerfully with Priestley's 1945 audience, fresh from experiencing two world wars.
His socialist philosophy centres on collective responsibility: "We are members of one body. We are responsible for each other." The repetition of "millions and millions and millions of Eva Smiths" creates hyperbolic emphasis, suggesting working-class suffering affects vast numbers of people.
Priestley's Mouthpiece: The Inspector represents Priestley's own socialist beliefs, using moral authority rather than social status to challenge the capitalist characters.