The way that Inspector Goole conducts his “investigation” of sorts not only exposes Eva Smiths tragic “chain of Events” which leads to her eventual suicide but also enables the audience to understand each individual characters role in Eva’s death for Sheila getting her fired from her last steady job and Arthur Birling caring to much about “lower costs and higher prices” than his workers welfare. Goole is very clear when informing the Birlings and Gerald Croft of the way he like to “go to Work”! He states he will use “one line of inquiry” at a time. He feels to do otherwise would result in a “muddle”. Certainly his way of investigation highlights his polar opposite opinion to Arthur Birling whereas he believes in a “butterfly effect” where each character has individually contributed to the downward spiral of Eva Smith’s life.
Goole exposes the guilt of each character. The Birlings seem, at the beginning of the play to be a respectable “up market” family even Gerald Croft comments that they appear a “nice well behaved” family,