Category Archives: Paul Ehrlich

The Optimum Population of the World Should Be About One Hundred Thousand

Arthur C. Clarke? Fred Hoyle? Georg Borgstrom? Donald W. Mann? Gretchen C. Daily? Anne H. Ehrlich? Paul Ehrlich? Kenneth Smail? Question for Quote Investigator: The world population is projected to exceed 8 billion in 2022. Also, the United Nations Population Division forecasts that before 2100 the population will exceed 10 billion. Interestingly, some countries currently have …

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Quote Origin: Anyone Who Believes Exponential Growth Can Go On Forever in a Finite World Is Either a Madman or an Economist

Kenneth Boulding? Paul Ehrlich? David Attenborough? Mancur Olson? Wayne H. Davis? Jay W. Forrester? John S. Steinhart? Anonymous? Question for Quote Investigator: Population size, energy use, and gross domestic product (GDP) have grown exponentially for limited time periods within some nations; however, these trends are complex. Economies sometimes shrink; per-capita energy use sometimes declines; human …

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To Err is Human; To Really Foul Things Up Requires a Computer

Paul Ehrlich? Alexander Pope? Senator Soaper? Bill Vaughan? Agatha Christie? Anonymous? Dear Quote Investigator: I am reading your blog and that shows I am not a Luddite, but computers can be very exasperating. One of my favorite quotations on this topic is the following: To err is human, but to really foul things up you …

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