John L. Harper Professions : Author Born : May 27, 1925 Died : March 22, 2009 Browse All Authors Famous Quotes by John L. Harper The theory of evolution by natural selection is an ecological theory-founded on ecological observation by perhaps the greatest of all ecologists. It has been adopted by and brought up by the science of genetics, and ecologists, being modest people, are apt to forget their distinguished parenthood. John L. Harper theory-of-evolution science people Similar Authors F. E. Marsh author Iimani David author Beatrice Faust author Isabella Macdonald Alden author Isabella Beeton author Alan AtKisson author All Authors