John B. Calhoun
Calhoun's work gained worldwide recognition. He spoke at international conferences and his opinion was sought by groups as diverse as NASA and the District of Columbia's panel on overcrowding in local jails. His rat and mouse studies were a basis for the development of Edward T. Hall's ideas on proxemics. Calhoun's seminal 1962 ''Scientific American'' article on "Population Density and Social Pathology" fueled fears of the dystopian effects of human overpopulation, which Paul Ehrlich predicted in his 1968 bestseller ''The Population Bomb''. Provided by Wikipedia