The prologue narrated by Galadriel is essential because it establishes the Ring itself as the primary protagonist and antagonist of the entire trilogy, long before we meet the Hobbits. By compressing thousands of years of history into a mythic, sweeping sequence, the film provides the necessary scale and weight to a small gold band. Without this context, the Ring would appear to be a mere plot device rather than an ancient, corrupting entity that has brought down empires. Starting directly in the Shire would risk making the story feel like a localized, low-stakes children's adventure. The prologue sets up a cinematic contrast: it juxtaposes the world-shattering battles of the Second Age with the quiet, mundane peace of Hobbiton. This sudden drop in scale makes the Shire feel incredibly fragile and precious. By the time Gandalf arrives at Bilbo's door, the audience understands the catastrophic danger that this peaceful paradise is oblivious to, instantly charging the quiet domestic scenes with immense dramatic tension.■