Darwin's version of evolution has been widely explored in fiction, both in fantasies and in imaginative explorations of its grimmer "survival of the fittest" effects, with much attention focused on possible human evolution. H. G. Wells's The Time Machine already mentioned, his 1896 The Island of Dr Moreau, and his 1898 The War of the Worlds all pessimistically explore the possible dire consequences of the darker sides of human nature in the struggle for survival. More broadly, Joseph Conrad's 1899 Heart of Darkness and R. L. Stevenson's 1886 Dr Jekyll and Mr Hyde portray Darwinian thinking in mainstream English literature.
