The Limits to Growth by the Club of Rome
In its day the Club of Rome was a very influential book. I was around in its day and bought a copy. The woman I was later to marry bought a copy too, so for many years we had two copies. It seemed particularly inappropriate given that one of its messages was that we are using resources too prolifically. It is hard to imagine how big an impact it had nowadays. After Silent Spring I would say it was the book that did most to create the environmental movement.
