Duality of Man and Science vs Religion Jekyll, Utterson and Poole 10, 2, and 8 Darwinism was a major controversial idea at the time, and Stevenson uses this idea to make Hyde, seem even more terrifying, as he is more animalistic ("as displayed by the constant dehumanisation" and less evolved than Jekyll (as shown by their physical differences) would have been interpreted that everyone has an animal inside them.