The Kallikak Family: A Study in the Heredity of Feeble-Mindedness was a 1912 book by the American psychologist and eugenicist Henry H. Goddard. The work was an extended case study of Goddard’s for the inheritance of “feeble-mindedness,” a general category referring to a variety of mental disabilities including mental retardation, learning disabilities, and mental illness. Goddard concluded that a variety of mental traits were hereditary and society should limit reproduction by people possessing these traits.
It’s straight out of Kevin MacDonald’s work about altruistic punishment, Northwest European egalitarian individualists needing an “overarching moral system” in order to cooperate compared to Eastern clan-based values where family and tribe come before abstract moral concerns.
In Confucius’ Analects, we are told of a man called Kung the Upright whose father stole a sheep. Kung testifies against his father. The Duke, as he reports the case to Confucius, is proud of what he considers to be Kung’s uprightness.
But Confucius disagrees, saying that in his country, the son who would protect his father is the one considered upright.
“My brother and I against my cousin, my cousins and I against the world.”