Important book with an important and undeniable message. Anyone with a vested interest in the future must read it. Especially investors. Plenty of people dismiss the message because it hasn't fully come to fruition, but anyone who is even remotely paying attention to anything going on in the world today can easily see the connection between the problems and this single, universal cause. Any economist can tell you about the Law of Diminishing Returns. Ehrlich provides the ultimate example of it in action.