Accepting the common descent of species, Gingerich is a theistic evolutionist. He describes himself as an evolutionist and he has rejected biblical creationism. Ernst Haeckel was a German evolutionist and zoologist known for proposing the gastraea hypothesis. He found new interpretations in positivist and evolutionist theories. Whitman was a non-Darwinian evolutionist. She was a religious agnostic, and a staunch evolutionist. He considers the evolutionist doctrine to be a major philosophical and scientific error. The speculative cosmology of Blaga also includes an entelechial interpretation of evolutionist biology. Evolutionist Charles Darwin corresponded on the initial organization of the early institution. The term "ortholog" was coined in 1970 by the molecular evolutionist Walter Fitch. However, evolutionist Robert Chambers convinced him to stay. He was also a pronounced Christian Evolutionist.