The book is an apocalyptic horror novel presented as a collection of individual accounts in the aftermath of a global pandemic that leads to a catastrophic zombie outbreak. Through interviews with survivors from various countries and walks of life, the narrative unfolds the social, political, cultural, and environmental implications of the zombie crisis, known as World War Z. The personal stories explore the widespread panic, the collapse and resurgence of governments, military strategies employed to combat the undead, and the human resilience in the face of a decimated world. The novel serves as a critique of societal responses to disasters and a commentary on the human condition.

"Collapse" is an exploration of why certain societies throughout history have thrived while others have deteriorated and collapsed. The book delves into environmental problems, climate change, rapid population growth, and unwise political decisions as factors that contribute to the downfall of a civilization. The author uses examples from history such as the Mayans, the Vikings in Greenland, and modern examples like Rwanda and Haiti, to illustrate his points. It serves as both a historical analysis and a warning for modern societies to learn from the past in order to avoid a similar fate.

In a bleak, ash-choked world ravaged by an unspecified catastrophe, a father and his young son journey on foot toward the coast, pushing a cart of their meager possessions and eking out food while avoiding bands of desperate, violent survivors; along the way they struggle with exposure, starvation, and the moral dilemmas of preserving their humanity, the father's fierce protectiveness and the boy's innocence providing fragile sources of hope as they travel through ruins and confront the costs of survival.