John Bumpass Calhoun was an American ethologist and behavioral researcher noted for his studies of population density and its effects on behavior. He claimed that his observations of the bleak effects of overpopulation on rodents were a grim preview for the future of the human race. Wikipedia
Born: 11 May 1917, Elkton, Tennessee, United States
Died: 7 September 1995 (age 78 years), Hanover, New Hampshire, United States