Richard Levins

Richard "Dick" Levins (June 1, 1930 – January 19, 2016) was an American ecologist, a population geneticist, biomathematician, mathematical ecologist, and philosopher of science. He had researched diversity in human populations. Levins was a university professor at the Harvard T.H. Chan School of Public Health and a long-time political activist. He was best known for his work on evolution and complexity in changing environments and on metapopulations.
Levins died in Cambridge, Massachusetts on January 19, 2016 from heart failure at the age of 85.