John Williams‘ film scores are not just popular; they are a masterclass study in compositional technique. For students of music composition, his work demonstrates how musical ideas can aid in narrative work by establishing characters, building tension, and guiding emotional arcs. To achieve this, John Williams relies on two compositional devices: leitmotif and harmony. Understanding how Williams handles these can provide valuable lessons for anyone who wants to write dramatic music.
Leitmotif as Musical Identity
Williams uses leitmotifs as thematic fingerprints with expert precision. For those unfamiliar, leitmotifs are short, memorable ideas attached to a character, place, or concept. In Star Wars, Luke Skywalker’s theme (“Luke’s Theme“) soars with heroic intervals and a natural upward contour, embodying optimism and the character’s traits. By contrast, the “Imperial March,” a leitmotif most closely associated with Darth Vader, is dominated by repeated rhythms and minor tonalities that communicate authority and menace.
Compositionally, Williams rarely leaves a leitmotif static. He alters the leitmotif through orchestration and reharmonization to fit a certain scene. Luke’s theme might be bold in brass, with a full major setting early on, then become wistful and slower in strings as the character faces uncertainty. By varying orchestration, tempo, and mode, Williams is able to take a single thematic idea and use it to convey multiple layers of meaning while remaining tied to the character.
Williams’ use of leitmotif has, on occasion, become so attached to a character that it transcended its use on the silver screen. The “Jaws Theme” music has become embedded in our culture as a warning of impending danger. And if you don’t believe that the leitmotif has taken a life of its own, then try this fun social experiment: set the ringtone for your significant other to the “Imperial March” and see how they react to that.
Harmonic Strategies for Emotion
Harmony frames the way we perceive these motifs. Williams often relies on clear tonal centers for accessibility, but will introduce chromaticism and modal mixture to create tension. A great example of this is the two-note ostinato in Jaws. That motif is harmonically bare at first, but its placement against shifting dissonant clusters is brilliantly designed to create unease. The main lesson here is that harmony doesn’t need to be complex to be effective—contrast and context do the heavy lifting, and that is even more true when coupled with the visuals and dialogue of a film’s character.
In lyrical moments such as E.T., Williams favors extended diatonic writing enriched with suspensions and pedal points. While most found this a sci-fi film with elements of adventure and fantasy, it is deeply rooted in human emotion, making it, in my mind, a drama, and that is owed in large part to Williams’ score. By delaying cadences, Williams prolongs emotional release. This is used to perfection in some of the film’s more touching moments.
The Interplay of Leitmotif and Harmony
Perhaps the real brilliance of Williams’ work is the way he allows leitmotif and harmony to interact. The “Force Theme” is a prime example: melodically, it remains stable across the Star Wars films, but Williams recasts it harmonically depending on context. In triumphant scenes, it sits atop strong major chords and open intervals; in darker moments, it is reharmonized with minor shifts, diminished chords, or low-register voicings. By doing this, he keeps the material fresh while maintaining thematic cohesion.
