How did J B Priestley's political views affect his writing?

In Inspector Calls, for example, the Inspector was Priestley's mouthpiece - so whatever the Inspector said echoed Priestley's true views. Priestley wasn't a capitalist, and was more of a socialist than anything else, and this rings true during Inspector Calls, because the younger Birlings are made to feel bad about their materialistic views since they contributed towards the death of Eva Smith's/Daisy Renton's suicide. There are loads more examples!