how does the author present social responsibility in an inspector calls

Though responsibility itself is a central theme of the play, the last act of the play provides a fascinating portrait of the way that people can let themselves off the hook. If one message of the play is that we must all care more thoroughly about the general welfare, it is clear that the message is not shared by all. By contrasting the older Birlings and Gerald with Sheila and Eric, Priestley explicitly draws out the difference between those who have accepted their responsibility and those who have not.