Population, Resources, Environment
by Paul Ehrlich, by Anne Ehrlich
W.H. Freeman, 400 pp., $8.95 (to be published in May)
Ecology has become the Thing. There are ecological politics, ecological jokes, ecological bookstores, advertisements, seminars, teach-ins, buttons. The automobile, symbol of ecological abuse, has been tried, sentenced to death, and formally executed in at least two universities (replete with burial of one victim). Publishing companies are fattening on books on the sonic boom, poisons in the things we eat, perils loose in the garden, the dangers of breathing. The Saturday Review has appended a regular monthly Ecological Supplement. In short, the ecological issue has assumed the dimensions of a vast popular fad, for which one can predict with reasonable assurance the trajectory of all such fads—a period of intense general involvement, followed by growing boredom and gradual extinction, save for a die-hard remnant of the faithful.
This would be a tragedy, for I have slowly become convinced during the last twelve months that the ecological issue is not only of primary and lasting importance, but that it may indeed constitute the most dangerous and difficult challenge that humanity has ever faced. Since these are very large statements, let me attempt to substantiate them by drawing freely on the best single descriptive and analytic treatment of the subject that I have yet seen, Population, Resources, Environment by Paul and Anne Ehrlich of Stanford University. Rather than resort to the bothersome procedure of endlessly citing their arguments in quotation marks, I shall take the liberty of reproducing their case in a rather free paraphrase, as if it were my own, until we reach the end of the basic argument, after which I shall make clear some conclusions that I believe lie implicit in their work.
Ultimately, the ecological crisis represents our belated awakening to the fact that we live on what Kenneth Boulding has called, in the perfect phrase, our Spaceship Earth. As in all spaceships, sustained life requires that a meticulous balance be maintained between the capability of the vehicle to support life and the demands made by the inhabitants of the craft. Until recently, those demands have been well within the capability of the ship, in its ability both to supply the physical and chemical requirements for continued existence and to absorb the waste products of the voyagers. This is not to say that the earth has been generous—short rations have been the lot of mankind for most of its history—nor is it to deny the recurrent advent of local ecological crises—witness the destruction of whole areas like the erstwhile granaries of North Africa. But famines have passed and there have always been new areas to move to. The idea that the earth as a whole was overtaxed is one that is new to our time.
For it is only in our time that we are reaching the limit of earthly carrying capacity, not on a local but on a global basis. Indeed, as will soon become clear, we are well past that capacity, provided that the level of resource intake and waste output represented by …