"Dr. Jekyll/Mr. Hyde" is a novella by Robert Louis Stevenson that explores the theme of duality within human nature. The story follows Dr. Henry Jekyll, a respected scientist who creates a potion that transforms him into Mr. Edward Hyde, his darker alter ego. This transformation allows Jekyll to indulge in immoral behaviors without facing the consequences of his actions. The duality in the narrative highlights the conflict between good and evil within individuals. As Jekyll struggles to control Hyde, the story raises questions about identity, morality, and the inherent struggle between societal expectations and personal desires.