Priestley presents his ideas upon an egalitarian society through the raisonneur, the Inspector, antithesising the typical bourgeois capitalist construct that is Mr Birling
Priestley served in the war for 5 years and so he has an understanding of what war was like and this experience may have led him to try and change society to prevent it from happening again
Social Mobility
The ability for an individual, family or group to move between different social classes
