The question of whether Eva was alive or not is irrelevant. The point Priestley wanted to put across to the readers of the play is the moral dilemma in which he places the characters and the ongoing theme of responsibility. The fact that the older generation (Birling, Mrs Birling and Gerald) were not affected in the slightest by the fact that they may have contributed to a young girl's death, whereas the younger generation (Eric and Sheila) were genuinely remorseful and guilty. This also relates to another key theme of class; Birling, a self-centred, pompous character, only cares about upholding HIS reputation and family name and anyone of a lower class is irrelevant to him. The Inspector, however, raises a valuable point that 'there are millions of John Smiths and Eva Smiths in the world', suggesting that snobby upper-class people are the cause of this issue.