What is the viewpoint that J.B. Priestley is trying to convey to the audience through the portrayal of the characters in "An Inspector Calls"

"An Inspector Calls" was written in the 1940's after the class system had been broken down by war, and was set in 1912 when the class system was still in existence. The audience would have generally been made up of upper class people, they also would have related to Eric and Sheila as the language they used would have been similar to the audience. Priestley uses the characters Eric and Sheila to try to get the younger generation to change; Priestley's viewpoint is not to let the class system return.
The Inspector is a socialist and Birling is a capitalist, this reflects the contemporary cl…