Set in a dystopian future, Dark Age spans planets, moons, and political factions across the solar system. Pierce Brown’s universe exerts constant pressure on the characters, shaping their choices, allegiances, and identities. From the scorched sands of Mercury to the frigid reaches of Jupiter’s moons, the solar system functions as a fractured empire where each world has its own physical environment, societal customs, and strategic importance.

The Society’s now-shattered, color-based caste system shaped the early structure of this word: Golds ruled at the top, Obsidians were bred as mythic warriors, Reds toiled as subterranean laborers, Blues navigated ships and managed data systems, Grays enforced order as soldiers and police, Whites served as judges and religious leaders, Oranges maintained the mechanical backbone of society, etc. Each color was engineered for a specific role, their identities, worth, and freedoms rigidly assigned by function. Dark Age also introduces the Ascomanni: a lost tribe twisted by time and war into something brutal. The consequences of revolution have left these structures in flux: Even in the Republic, differences between colors still exist, though all are guaranteed representation in the Senate. The cities of Mercury, like Heliopolis and Tyche, become epicenters for brutal conflict, as the planet’s instability makes it both symbolically and strategically vital.

The technological sophistication of this universe—razor weapons, mind-control devices, and terraforming “Storm Gods”—is juxtaposed with its brutality: mass crucifixions, child brides, and chemical warfare. This duality reflects the series’ central tension between humanity’s potential and its persistent savagery.

Throughout Dark Age, Brown grounds the narrative in sensory detail and topographical realism. Battles are shaped by geography—deserts, mines, orbital platforms—and the physics of different planets, creating high-stakes settings that are both alien and relatable. The terrain becomes a force in the novel, shaping both strategy and survival.