Paul R. Ehrlich
Paul Ralph Ehrlich is an American biologist and educator who is the Bing Professor of Population Studies in the department of Biological Sciences at Stanford University and president of Stanford's Center for Conservation Biology. By training he is an entomologist specializing in Lepidoptera (butterflies), but he is better known as an ecologist and a demographer, specifically for his warnings about unchecked population growth and limited resources. Ehrlich became a household name after publication of his controversial 1968 book The Population Bomb.
“Trying to separate the contributions of nature and nurture to an attribute is rather like trying to separate the contributions of length and width to the area of a rectangle, which at first glance also seems easy. When you think about it carefully, though, it proves impossible.”
Paul R. Ehrlich