Carson opens with 'A Fable for Tomorrow,' a parable of an American town destroyed by invisible poison. She then traces the history of synthetic pesticides from WWII chemical weapons to peacetime agriculture, and explains the mechanisms by which these chemicals contaminate soil, water, and the entire web of life.

Carson documents how pesticides contaminate surface water and groundwater systems, poison soil ecosystems, and destroy the intricate web of plant life that sustains all other organisms. She traces chemical pathways from application point through soil, water table, streams, and ultimately to the sea.

Carson documents the mass killing of birds, fish, and wildlife by pesticide programs. She details the USDA fire ant campaign, the robin die-offs from elm spraying, the destruction of salmon runs, and the mechanism of bioaccumulation through food chains that drives predator species toward extinction.

Carson turns from ecological damage to human health, documenting the emerging evidence that pesticide exposure causes cancer, liver damage, neurological harm, and genetic damage. She examines how chemicals enter the human body through food, water, and air, and how the regulatory system has failed to protect the public.

Carson examines how government agencies — particularly the USDA — became allies of the chemical industry rather than protectors of the public. She documents the revolving door between regulatory agencies and chemical companies, the suppression of dissenting scientific voices, and the systematic failure to enforce existing safety standards.

Carson presents biological alternatives to chemical pesticides — natural predators, sterilization techniques, microbial controls, and integrated pest management. She argues that working with nature rather than against it is not only more ethical but more effective, and closes with a vision of a science that respects the complexity of the natural world.