The document discusses several key themes in J.B. Priestley's play "An Inspector Calls":
1) Responsibility - The play explores both personal and social responsibility, and how the characters respond to being held accountable for Eva Smith's death.
2) Class - The play highlights class divides in 1912 Britain and how the upper-class characters view the lower classes, exemplified through Eva.
3) Gender - Eva's vulnerable position as a working-class woman is emphasized.
4) Age - The older and younger generations deal with the inspector's revelations differently, with the young more open to change.