Amusingly, Raj Chetty himself has excellent genetics and inherited his ability. He is from an extremely high achieving family as the article states: "In 1962, A

Amusingly, Raj Chetty himself has excellent genetics and inherited his ability. He is from an extremely high achieving family as the article states: "In 1962, Anbu married Veerappa Chetty, a brilliant man from Tamil Nadu whose mother and grandmother had sometimes eaten less food so there would be more for him. Anbu became a doctor and supported her husband while he earned a doctorate in economics. By 1979, when Raj was born in New Delhi, his mother was a pediatrics professor and his father was an economics professor who had served as an adviser to Prime Minister Indira Gandhi" Also from the article, in keeping with tradition, he married a member of his own caste, the Chettiar. Caste is observably a system for implementing a eugenics program, of which Raj Chetty is a prime example of success. And of course he's continuing the tradition: "[his wife] Sundari is a stem-cell biologist"