Rachel Carson's Silent Spring, published in 1962, documented the damage done to wildlife, ecosystems and human health by the indiscriminate use of synthetic pesticides such as DDT. Drawing on scientific studies and vivid reporting, she showed how chemicals accumulated through food chains and threatened a future spring without birdsong. The book provoked fierce industry opposition but reached a wide public and helped prompt new regulation. It made ecological interdependence and the unintended consequences of technology matters of mainstream concern.
It is widely credited with launching the modern environmental movement, which reshaped planning toward ecological awareness, regulation and sustainability. Its argument that human action ripples through interconnected natural systems underlies later environmental planning.