Biologist who focused on speciation and ecological and evolutionary genetics. His research often involved the fruit fly, Drosophila.
He attended Rockefeller University and Harvard University.
He is an outspoken proponent of atheism and the conflict thesis, which contends that there is an intrinsic intellectual conflict between religion and science and that the relationship between religion and science inevitably leads to public hostility.
He grew up in Chicago and wrote the book 'Speciation.'
He studied under Theodosius Dobzhansky at Rockefeller University.