Set in early 19th-century France, the narrative follows the lives and interactions of several characters, particularly the struggles of ex-convict Jean Valjean and his journey towards redemption. The story touches upon the nature of law and grace, and elaborates upon the history of France, architecture of Paris, politics, moral philosophy, antimonarchism, justice, religion, and the types and nature of romantic and familial love. It is known for its vivid and relatable characters, and its exploration of societal and moral issues.

The novel is a gritty portrayal of working-class life in 19th-century Paris, focusing on the struggles of Gervaise Macquart, a laundress who aspires to a better life. After her lover abandons her with two children, she marries a roofer, Coupeau, and they initially find happiness and modest prosperity. However, their lives spiral downward due to alcoholism, poverty, and the harsh realities of their social environment. The narrative delves into the impact of addiction on family dynamics and the broader community, painting a vivid and unflinching picture of the urban poor's descent into despair and degradation.

"So Human an Animal" is a Pulitzer Prize-winning work that explores the complex relationship between the environment and human health. The book argues that the rapid technological advancements and urbanization of the 20th century have negatively impacted human health and happiness. The author suggests that a return to a more natural way of living and a reconnection with nature could help to alleviate these issues. The book is a call to action, urging society to consider the impact of its actions on the environment and human well-being.