The Beast in the Jungle is a 1903 novella by Henry James, first published as part of the collection, The Better Sort. Almost universally considered one of James' finest short narratives, this story treats appropriately universal themes: loneliness, fate, love and death. The parable of John Marcher and his peculiar destiny has spoken to many readers who have speculated on the worth and meaning of human life.

John Marcher, the protagonist, is reacquainted with May Bartram, a woman he knew ten years earlier while living in southern Italy, who remembers his odd secret: Marcher is seized with the belief that his life is to be defined by some catastrophic or spectacular event, lying in wait for him like a "beast in the jungle". May decides to buy a house in London with the money she inherited from a great aunt, and to spend her days with Marcher, curiously awaiting what fate has in store for him. Marcher is a hopeless fatalist, who believes that he is precluded from marrying so that he does not subject his wife to his "spectacular fate".

He takes May to the theater and invites her to an occasional dinner, but does not allow her to get close to him. As he sits idly by and allows the best years of his life to pass, he takes May down as well, until the denouement where he learns that the great misfortune of his life was to throw it away, and to ignore the love of a good woman, based upon his preposterous sense of foreboding.