How does Priestley explore the importance of social class in An Inspector Calls?

This is a great question. In order to answer it, I would first think about my thesis (line of argument), because the question isn't only asking how Priestley explores the theme of social class, but also what effect his exploration has on the reader. Your thesis, is your chance to give your personal opinion, but if you're struggling in the exam and can't decide I always look to the ending; the ending of a text almost always points in a certain direction. For example, in The Inspector Calls the Birling family believe they are off the hook when they discover that the Inspector wasn't real and no girl has died in the infirmary. However, at the end of the play, a telephone call reveals a real inspector is on his way to investigate the death of a young girl. Therefore, the ending seems to suggest that Priestley is demonstrating how social class can lead people to believe they do not need to take responsibility for their actions because even after the family realise the consequence of their actions they go back to their usual way of life.After I have established my thesis, I then need to plan my argument. In my opinion, the easiest way to do this is by picking three themes, motifs or characters and writing a paragraph about each. Here is an example of a way in which you could start your first paragraph:Priestley explores how social class can lead people to believe they do not need to take responsibility for their actions, through the use of the character, Inspector Goole. One could argue, the Inspector is a symbol of social justice because...