Yes, the letters in the text are flashbacks in a sense as they were written in the past. You could see the letters as supernatural, as they give clues to the occurances in the present and link us to the past. Frankenstein is overflowing with texts: letters, notes, journals, inscriptions, and books fill the novel, sometimes nestled inside each other, other times simply alluded to or quoted.
Walton’s letters envelop the entire tale; Victor’s story fits inside Walton’s letters; the monster’s story fits inside Victor’s; and the love story of Felix and Safie and references to Paradise Lost fit inside the monster’s story. This profusion of texts is an important aspect of the narrative structure, as the various writings serve as concrete manifestations of characters’ attitudes and emotions. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.