The departure of humanity from Earth leaves behind a legacy of robots and intelligent animals to inherit a world transformed.

Through a series of interconnected tales, the narrative follows the Webster family across vast stretches of time as they witness the decline of human civilization. The primary conflict arises from the obsolescence of the human species, which gradually retreats from the physical world, leaving the planet to the care of sentient robots and uplifted dogs. The world-building operates on a grand, multi-generational scale, utilizing a non-linear structure that spans thousands of years to document the shift from urban life to a quiet, pastoral existence.

Discussion often centers on the melancholic tone and the unique perspective of a world where humanity has faded into myth. Readers frequently highlight the effectiveness of the dog-narrators in providing a detached, analytical view of human history. The pacing is deliberate, favoring philosophical inquiry over traditional action-oriented plot beats. Critics often note that the book serves as a meditation on the nature of progress and the eventual obsolescence of civilization. Many readers appreciate the quiet, contemplative atmosphere that persists throughout the various segments of the narrative.