The community was divided into three different classes. The Aristocracy, the Middle classes and the Working classes. The Aristocracy was the richest class, where the men were very prosperous and the women stayed at home, merely welcoming guests at dinner parties and providing them with entertainment. Gerald has a mother, Lady Croft, who comes from the landed aristocracy, and a father who is a knight, so to Sheila's family her engagement represents welcome social recognition. The class below the Aristocracy is the Middle class.
This is the class in which the Birling family are from. Mr Birling's new arrival into the Middle classes was due to his wealth, which he earned through his trade. Throughout the play, Mr Birling desperately tries to protect his chances of getting a knighthood, and foolishly attempts to use his social superiority to undermine the Inspector's authority.
"I was an alderman for years- and Lord Mayor two years ago- and I'm still on the bench." Ms Birling also tries to use her husband's social position to intimidate the Inspector and is confused when this tactic fails.
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The lowest and worst class is the Working class. These people lived unprotected, dangerous lives with no hope for their future. This is the social class to which Eva Smith belongs. With both her parents dead, unlike Sheila, she is forced to