White-Jacket; Or, The World on a Man-of-War transforms the enclosed universe of a U.S. naval frigate into a searching anatomy of authority, discipline, and human dignity. Through the observant sailor White-Jacket, Melville combines documentary realism with satire, nautical technicality, moral argument, and moments of philosophical expansiveness. Published in 1850, between Redburn and Moby-Dick, the book belongs to Melville's great sequence of sea narratives, yet its purpose is unusually reformist: its vivid indictment of flogging and arbitrary command helped shape contemporary debates over naval punishment. Melville wrote from experience. Having served aboard the frigate United States after years of merchant voyaging, whaling, and travel in the Pacific, he knew both the romance and brutality of maritime life. His earlier successes, Typee and Omoo, had established him as an interpreter of oceanic worlds; White-Jacket channels that authority into a more public, almost legislative critique of institutional power. Readers interested in maritime literature, American reform writing, or the emergence of Melville's mature art will find this book indispensable. It is at once a gripping shipboard narrative and a profound study of how systems test the conscience.