Discordant Harmonies: A New Ecology for the Twenty-first Century by Daniel B. Botkin (Oxford University Press, 1990).
A friend gave me this used book, knowing of my interest in environmental science, and it made a good companion for a cross-country airplane trip. Although it was published 27 years ago, it certainly belongs on the bookshelf of all environmentalists. Dr. Botkin was one of the pioneers in the field of ecological research in the U.S., and developed some of the first computer models. However, this is not an academic treatise; it is an attempt (and I think a successful one) to explain ecology to the general public. Botkin begins by exploring various ways of thinking about nature and our Earth – as a divine creation, as a machine, or as an organic being. He then explains how the idea of nature as a constant, steady-state system is scientifically false, because the historical data shows so much change of an essentially random nature. This understanding leads to some key consequences for the management of natural resources, which he illustrates through discussions of specific ecological niches which he has personally studied. Botkin clearly knows his environmental science, because in this book he predicted the climate change we have experienced since 1990.