Since Gaia was first published, many of Jim Lovelock's predictions have come true, and his theory has become a hotly argued topic in scientific circles. Here, in a new Preface, Lovelock outlines his present state of the debate.
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Unfortunately, the argument is expressed in overlong and convoluted fashion. He deliberately limits himself to a nonscientific explanation in this book. The scientific version of the argument is in The Ages of Gaia. Although the book is not long, it certainly could have been condensed into a longish article for Scientific American or The Atlantic Monthly. My second quibble is that the editor was nowhere in sight on the organization of the book. The key point is often buried in the third sentence of the last paragraph in a chapter. The argument in between wanders into all kinds of places where it doesn't need to go. For organization and editing, I give this book a one star rating.
So the average is a 4 star rating. The writing itself is pleasant enough. Don't let the lack of organization and editing put you off, for it is worth your while to read this book. It will remind you of the benefits of the sort of sytems thinking that Peter Senge talks about in The Fifth Discipline.
The other thing you will learn is the weakness of scientific work that fails to develop enough field data and to connect enough with other disciplines. I was struck by the same observations recently while visiting environmental scientists at the Smithsonian Institution. The basics in many of these areas have yet to be measured and evaluated. This book will point countless generations forward in understanding how our plant maintains its environment that permits life to flourish. Clearly, it is a stallbusting effort to replace "stalled" thinking about the history and future of the Earth. I found the key questions (such as why doesn't the ocean become more saline?) to be irresistible. I think you will, too. Enjoy and think!
Lovelock readily admits that the book serves more to promote the dialog about our planet as a living, breathing whole and to share key discoveries that support his concept. (He states in the Preface that his follow-on book, "The Ages of Gaia" aims to build the scientific argument to the Gaia theory.)
By no means, does Lovelock detour around the science that supports his case. With the scope of the topic requiring knowledge of both physical and biological science, and the small number of pages, he manages to instruct and create a sense of awe in a short amount of time.
The 3 major principles he brings to light about Gaia are:
1. Gaia exhibits a tendency to keep conditions (e.g., temperature, air quality) constant for all terrestrial life.
2. Like other living systems, Gaia has vital organs at the core, and expandable or redundant ones on the periphery.
3. Under the worse conditions, Gaia responses similar to other cybernetic systems (i.e., where time constant and loop gain are important)
The material is far reaching in both its scope and in shaping our understanding of where we stand. Put in the context of Gaia, we have straddled ourselves to the largest of all known living and breathing creatures.