Paul R. Ehrlich warned about the consequences of population growth and limited resources.

Paul R. Ehrlich in 1974.

Born: Paul Ralph Ehrlich
May 29, 1932 (age 86)

Philadelphia, Pennsylvania, U.S.
Residence Stanford, California, U.S.
Alma mater

University of Pennsylvania (AB)
University of Kansas (MA, PhD)
Known for The Population Bomb
Spouse(s)
Anne Howland (m. 1954)
Children 1
Awards

Crafoord Prize (1990)
The Heinz Awards (1995, with Anne Ehrlich)
Tyler Prize for Environmental Achievement (1998)
Fellow of the Royal Society(2012)
Scientific career
Fields

Entomology
Population studies
Institutions Stanford University
Thesis The Morphology, Phylogeny and Higher Classification of the Butterflies (Lepidoptera: Papilionoidea) (1957)
Doctoral advisor C. D. Michener


Paul Ralph Ehrlich (born May 29, 1932) is an American biologist, best known for his warnings about the consequences of population growth and limited resources. 

He is the Bing Professor of Population Studies of the Department of Biology of Stanford University and president of Stanford's Center for Conservation Biology.

Ehrlich became well known for his controversial 1968 book The Population Bomb, which asserted that the world's human population would soon increase to the point where mass starvation ensued.

 Among the solutions he suggested in that book was population control, to be used in his opinion if voluntary methods were to fail. 

Ehrlich has been criticized for his opinions; for example, Ronald Bailey termed Ehrlich an "irrepressible doomster".

However, Carl Haub observed that Ehrlich's warnings had encouraged governments to change their policies to avert disaster.  

Ehrlich has acknowledged that some of what he predicted has not occurred, but maintains that his predictions about disease and climate changewere essentially correct, and that human overpopulation is a major problem.



Link: https://en.wikipedia.org/wiki/Paul_R._Ehrlich