The Birlings are having an engagement party
1. Everyone is content and saying the right things
2. The Birlings are Priestley’s idea of a ‘perfect’ middle-class family:
. the father’s a successful businessman
. the mother works hard to keep up the Birlings’ reputation in the community
. the son works for the father in the family business
. the daughter’s engaged to the son of their competitor - this should improve the business because the two companies could start “working together” in the future