44 pages 1-hour read

Prometheus Unbound

Fiction | Play | Adult | Published in 1820

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Act IVChapter Summaries & Analyses

Act IV Summary

Near Prometheus’s cave, Panthea and Ione are sleeping. They are gradually awoken by the procession of “a train of dark forms and shadows” (IV.8)—the ghosts of “the dead hours” (IV.13), who are taking Time to his eternal tomb. In rhyming meter, Unseen Spirits herald the arrival of the Spirits of Air and Earth. The shadowy Hours have heard the call of Hope, Love, and Power. They describe their history: Where once they were “hounds” pursuing prey, they are now united with “might and pleasure” (IV.79). The Spirits of the Human Mind enter; together with the Hours, they celebrate the new utopia of wisdom and joy expressed through the arts and science. When they finish their song, they leave.


Ione and Panthea can hear the “deep music of the rolling world” (IV.186), or the so-called music of the spheres, imagined to be the sound of celestial bodies rotating and orbiting. Panthea describes the Spirit of the Earth sleeping happily and soundly. On its forehead is a star that symbolizes the unification of heaven and earth. The light from the star illuminates “the melancholy ruins” (IV.288) of past fallen empires.


The Earth celebrates the joy and triumph that covers it and describes how all of nature rejoices. The Moon’s formerly cold, lifeless form is now home to water, greenery, and life—the product of “love, all love!” (IV.269) The Earth says Love has breathed new life into the world, even into the “forgotten dead” (IV.374). The Earth celebrates the unification of humankind’s “love and might” (IV.395) in newfound harmony. This harmony is supported by language that gives shape to thoughts.


The Earth asks the Moon about its secrets. The Moon says its ice has thawed and now lovers walk through its bowers. The Moon celebrates how the spheres shine new light on the Earth. It admires the Earth’s beauty. The Earth in turn praises the Moon for its kind words and its crystalline light. Panthea and Ione feel cleansed by the song of the Moon and Earth.


Demogorgon arrives and joins the song of the Moon and Earth. It praises the beauty and divinity of the Earth and the Moon. It then calls out to all celestial bodies, which respond, “Our great Republic hears” (IV.533). Demogorgon then calls out to the now “happy dead” (IV.534), the elements and spirits, and to mankind. All sing together.


Demogorgon celebrates the rebirth of the world through love and its new regime of “Gentleness, Virtue, Wisdom, and Endurance” (IV.562).

Act IV Analysis

In the final act of Prometheus Unbound, all of the play’s elements unite in a final series of songs that celebrate togetherness, Platonic beauty, and the perfection of the natural world. It is the ultimate expression of Shelley’s vision of Cosmic Harmony as an Ideal of Human Progress. The new voice of ultimate power, Demogorgon, joins in song with celestial bodies, the Moon and the Earth, and with humans both living and dead. It is key to this vision that the dead are described as “happy” (IV.534); rather than being tormented in hell, they simply “change and pass away” (IV.538). Shelley is thus rebelling both against monarchism and against Christian dogma about the afterlife as a place of judgment. 


This Act offers the culmination of the polyphony, or overlaid voices, of the rhyming passages throughout Prometheus Unbound. In the final moments, Demogorgon calls on every aspect of the universe, both above and below, to join in song. Voices are heard from all things animate and inanimate. The resulting chorale embodies the twinned notions of the Musica universalis, or universal music, and Hamonices Mundi, or the music of the spheres. The ancient Greek philosopher and mathematician Pythagoras believed that the motion of the celestial bodies creates a sound, the resonance of which impacts life on Earth. In the early 17th century, German astronomer Johannes Kepler built on this idea to posit that the music of the spheres is essential to the harmony of all things. Shelley’s treatment of these notions in Prometheus Unbound is not scientific, as Pythagoras’ and Kepler’s were, but rather based on his humanism and his belief that art could meaningfully contribute to harmonizing mankind, nature, and the universe. Shelley hoped poetry could bring about the world described by the Demogorgon at the end of the play: “Conquest” “dragged captive through the deep” by “Love,” restoring cosmic harmony (IV.556-557).


Shelley’s description of the “kings of suns and stars, Dæmons and Gods” as a “great Republic” is notable for its contribution to his project of Myth Rewritten as Political Allegory (IV.529). In the traditional Greek mythological worldview from which he derives the story of Prometheus, the rulership of the suns and stars is explicitly hierarchical and monarchical. However, in Shelley’s rendition, dethroning Jupiter restores cosmic harmony and essential equality amongst the planets and their mythical personifications. For instance, no longer does Jupiter reign over Apollo; instead, they have equal power and representation, both as deities and as representations of celestial bodies (the planet Jupiter and the sun). This symbolizes Shelley’s desire for the monarchy and hierarchy to be dissolved and replaced with a republic where all people are equal.

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