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Robert Louis Stevenson's family background exposed him to both scientific and religious influences. Darwin's theory of evolution and the case of Deacon Brodie were social influences on the novel.

Dr Jekyll and Mr Hyde is about the complexities of science and the duality of human nature. Dr Jekyll is a well-respected scientist whose experiments with the darker side of science lead to tragedy.

Dr Jekyll and Mr Hyde present two very different faces of the same character. Utterson and Lanyon are portrayed as more conventional figures.

A theme is a key idea that runs through a text. The key themes in Dr Jekyll and Mr Hyde are scientific development and duality of mankind.

Form, structure and symbolism reveal how Stevenson presented his novel to readers, his intentions, and what he was trying to make the reader think and feel.