I reconstruct the relationship between the evolutionary geneticists Theodosius Dobzhansky (1900–1975) and Richard Lewontin (1929–2021). Using archival research and published texts, I show that Lewontin inherited his dissertation director’s research program as well as his “biology of democracy.” He did so in circumstances in which the molecular revolution in genetics was threatening both Dobzhansky’s science and his anti-racist social ideals. Lewontin’s sometimes rocky relationship with the person he called “my professor” sprang from his perception that Dobzhansky was not up to (...) managing the research program that Lewontin received from him. I explain how Lewontin took charge and the role his Marxist interpretive lens plays in his argument. (shrink)