Theodosius Grigorievich Dobzhansky

Theodosius Grigorievich Dobzhansky (Russian: Феодо́сий Григо́рьевич Добржа́нский; Ukrainian: Теодо́сій Григо́рович Добржа́нський; January 25, 1900 – December 18, 1975) was a prominent Ukrainian-born American geneticist and evolutionary biologist. He was a central figure in the field of evolutionary biology for his work in shaping the modern synthesis. Born in the Russian Empire, Dobzhansky emigrated to the United States in 1927, aged 27.His 1937 work Genetics and the Origin of Species became a major influence on the modern synthesis. He was awarded the US National Medal of Science in 1964 and the Franklin Medal in 1973.