Looks at the nature of evolution, the genetic structure of populations, hereditary variation, natural selection, and the relationship between populations, races, and species
Theodosius Grygorovych Dobzhansky (Ukrainian: Теодо́сій Григо́рович Добжа́нський; Russian: Феодо́сий Григо́рьевич Добржа́нский) , Ph.D. (University of Leningrad, 1927; B.S., Biology, University of Kiev, 1921), was a prominent geneticist and evolutionary biologist, one of the central figures in modern evolutionary synthesis; his major work concerning the latter is "Genetics and the Origin of Species", published in 1937. He emigrated to the USA in 1927 on a scholarship from the Rockefeller Foundation.
Dobzhansky was the recipient of the National Medal of Science in 1964 and the Franklin Medal in 1973.
Read this magnificent work in my second year of university - and then again after I graduated. It's a rewarding read - with clear, concise writing that should serve as a guide for advanced course textbook writers everywhere. Looking back now, Evolution was a fantastic primer and intro to the then-state-of-the-art in molecular genetics.