William deBuys has written an environmental history of the American Southwest. He explores the history and present of the region so that he can offer a prognosis on what a warmer, drier world will mean for this region in the future. And that prognosis does not look good based on demographic and environmental trends.
In the history section, using archaeological records and other sources, deBuys explores the failed civilizations of the American southwest. He shows how they succumbed to the mega droughts of the twelfth and thirteenth centuries. The drier world of the time led to the civilization of the time facing economic and demographic collapse. Some turned to violence. Others gave up on their homes and moved. When writing about these failed civilizations, there is a certain sadness to the author's voice that is quite touching. These were technologically advanced civilizations for the time period. And yet they could not do anything in the face of a warming world.
In the sections on the present, the author is at his best. The author systematically constructs the modern world that we live in, showing how policy, demographics, agriculture, immigration, and economics all interact to create a society that is using more water than is sustainable. And what an eye opener it is. No society can survive for long when it uses more water than is replaced. And yet according to the author, the American Southwest continues to add new people. But no new water is being added. Just the opposite. And that is just a demographic timebomb waiting to happen.
The author shows how present society's 'hydraulic cornucopia' is just a mirage in the desert. Eventually reality will set in. And then how will the society of the American Southwest deal with it? The author offers no solutions. He just describes the issues at hand. Though his book is one solution - education is a way forward. And the book does an excellent job of educating its readers to the problems at hand. There are no easy solutions, but the idea of balance between humanity and the environment is something that policy makers will need to look at - how to reach an equilibrium in a warming area where both humans and the environment can coexist and thrive.