Daniel Botkin's Discordant Harmonies (1990) was considered by many to be the classic text of the environmental movement. The book was the first to challenge the then dominant view that nature remained constant over time unless disturbed by human influence. Nature was believed to achieve a formand structure that would persist forever; if disturbed, it would recover, returning to that state of perfect balance. Discordant Harmonies argued that natural ecological systems are constantly fluctuating and our plans, policies, and laws governing the environment must change to reflect this newunderstanding.The ideas expressed in Discordant Harmonies, considered ahead of their time in 1990, are now timelier than ever. The belief in a balanced nature is alive and well, though those who hold it are constantly confronted by scientific evidence that stands in opposition. In The Moon in the Nautilus Shell:Discordant Harmonies Reconsidered, Botkin brings Discordant Harmonies into the twenty-first century. The book is updated with new research and statistics, case studies on climate change, and a new introduction.