A major theme of the novel is the intrusion of imperialism on everyday English life. Lynn Pykett argues that "the main narrative of The Moonstone concerns the disruption of the tranquility and order of genteel English life by a colonial legacy."[5] The events of the plot are set into motion by Colonel John Herncastle's unlawful theft of the Moonstone in India, and, in leaving the diamond to Rachel Verinder in his will, he is perpetuating his crime. It is only when the diamond is returned to its rightful owners that the 'curse' can be lifted.
Pykett also comments that the contradictory forces of feminine passion and silence provide the conflict of the novel: "[Sergeant] Cuff is defeated by the silence of women (Rachel and Rosanna), by feminine reticence (Lady Verinder), and the failure of individual women to conform to dominant stereotypes of femininity."
