The document provides context about J.B. Priestley's life and political views around the time he wrote An Inspector Calls. It explains that Priestley was concerned with social inequality in Britain and wanted social change. It then gives summaries of each character in the play, including Mr. and Mrs. Birling, Sheila, Eric, Gerald Croft, Inspector Goole, and Eva Smith. Context is also provided about when the play is set and how this differs from when it was written.