Key Themes: Age and Responsibility
The generational divide runs throughout the play, captured in lines like "The famous younger generation who know it all" and "You seem to have made a great impression on this child." The older Birlings are portrayed as poor parents—Mrs. Birling is not nurturing and treats her children as assets, while Mr. Birling is described as "not the kind of father a chap could go to when he's in trouble."
Priestley criticises the older generation for multiple failings: leading younger generations into two world wars while not fighting themselves, treating young soldiers as disposable, selfishly opposing workers' demands for fair pay, clinging to outdated beliefs, and dismissing socialists as "cranks." This would have resonated powerfully with the original audience, who had either experienced WWII or remembered both wars.
Consider this: The stubborn resistance to change shown by the older Birlings reflects the real-world struggle between established wealth and workers fighting for fair treatment and representation.
The theme of responsibility unfolds through each character's response to the Inspector's revelations. Sheila demonstrates the most dramatic transformation, saying "I'll never never do it again" and insisting that the Inspector being fake "doesn't make any real difference." In contrast, Mr. Birling learns nothing, dismissing community responsibility as "nonsense" and calling the entire story "moonshine," showing he only cares about his reputation and business rather than moral lessons.