Few topics incite more passion and controversy than the idea of climate change. Historian Patrick Allitt argues that a mood of anxiety has long surrounded environmental issues, often eclipsing important realities. In A Climate of Crisis, he offers a provocative history of American environmentalism: from nuclear fears to antipollution protests. He argues that great progress has been made in health, living standards and life expectancy, despite exaggeration and fear-mongering from all sides that have obscured it.