Justin’s Notes

Lewontin's Own Filing Cabinet Contains His Rebuttal

2026-08-02 · AI-generated insight

Read together, Lewontin and Winegard/Carl stage the most famous quarrel in this literature without either naming the other. Lewontin's claim rests on a specific move: judge by "randomly chosen genetic differences," one locus at a time, and human populations look "remarkably similar," with most variation lodged between individuals. From this he leaps to a policy verdict — classification is of "virtually no genetic or taxonomic significance."

But look at what Winegard and Carl report: researchers sort skulls into black and white Americans at 80% accuracy using only two variables. That result should be impossible if Lewontin's inference held. The resolution is quietly labeled on Lewontin's own note — Correlation Across Many Variables. This is precisely A.W.F. Edwards' rebuttal (the "Lewontin's fallacy"): any single trait is a poor discriminator, yet traits are correlated, and a handful of correlated measurements jointly locate a person's ancestry with high confidence. Lewontin measured the wrong thing — the information lives in the joint structure, not the marginal one. The tag under which Justin filed the quote is the very concept that dissolves it.

What makes this more than a technical footnote is the second half of Lewontin's passage, where a statistical claim slides seamlessly into a moral one: classification is "positively destructive," therefore "no justification can be offered for its continuance." Here the Coon anecdote becomes eerily relevant. The AAA condemned Putnam's book with one member having read it — condemnation preceding examination, the verdict fixed before the evidence. Lewontin performs the inverse of the same maneuver: the conclusion (classification must be baseless) arrives already loaded with the wish that it be so, and the analysis is recruited to serve it.

Wade names this circuit exactly — "the political view that genetics cannot possibly be the reason." The pattern across all four notes isn't that race is or isn't biologically real; it's that the machinery of measurement keeps getting steered by the answer people need it to produce. Lewontin's error and the AAA's vote are the same failure wearing different clothes: the finding was decided upstream of the looking.

Woven from these notes

The social scientists’ official view of race is designed to support the political view that genetics cannot possibly be the reason why human societies differ—the answer must lie exclusively in differing human cultures and the environment that produced them. The social anthropologist Franz Boas established the doctrine that human behavior is shaped only by culture and that no culture is superior to any other. From this point of view it follows that all humans are essentially interchangeable apart from their cultures, and that more complex societies owe their greater strength or prosperity solely to fortunate accidents such as that of geography.
— Nicholas Wade A Troublesome Inheritance: Genes, Race, and Human History
The primary reason that natural philosophers began to classify humans into different races is that human populations look different from one another. Their skin colors, hair textures, facial structures, and stature all differ, often in predictable ways. Furthermore, these differences reflect their divergent geographical origins. In fact, researchers can classify human variation by continent quite accurately using only data from the human skull. (They are able to correctly classify human skulls into black and white Americans with about 80% accuracy, using only two variables.) Therefore, despite the common charge that racial classification is ipso facto racist, and that most Enlightenment typologies of human variety were motivated by prejudices and a desire to rationalize imperial domination, ordinary people and Enlightenment philosophers also took to classifying human differences for the mundane reason that such differences actually exist.
— Bo Winegard, Noah Carl Superior: The Return of Race Science—A Review
Carleton Coon was one of the greatest anthropologists of the 20th century and a champion of the study of racial differences. In 1961 he was elected president of the American Anthropological Association. It was during this year that Carleton Putnam's infamous book Race and Reason came out. Putnam's book argued that there were significant differences between the races and that this had important political implications. A few anthropologists became upset when they saw the book gain popularity and wanted the AAA to intervene. But they knew that Coon supported the book and that, as a result, having the AAA take action against it would be difficult. So they organized a secret meeting behind Coon's back in order to issue a statement denouncing Putnam's work. Coon found out about the meeting and went to stop it. Upon entering the meeting Coon asked all the association members who had actually read Putnam's book to raise their hands. Only one rose. He then asked for the hands of everyone that had even heard of the book prior to that meeting. Only a few hands rose. None the less, the statement against the book passed. Coon, disgusted by the actions of his peers, resigned from the AAA (1). This incident stands out in the history of science as a particularly clear example of scientists not living up to what people expect of them. People often take what scientists say for granted. They trust that scientists have looked at the evidence rationally and are giving the public as accurate an account of all the relevant facts as they can. When explaining science to laypeople researchers are expected to only make authoritative statements on topics they are knowledgeable of, to not lie about scientific evidence, and to not omit obviously relevant facts. People trust scientists to do these things and so feel comfortable taking what they tell them for granted. (See
It is clear that our perception of relatively large differences between human races and subgroups, as compared to the variation within these groups, is indeed a biased perception and that, based on randomly chosen genetic differences, human races and populations are remarkably similar to each other, with the largest part by far of human variation being accounted for by the differences between individuals. Human racial classification is of no social value and is positively destructive of social and human relations. Since such racial classification is now seen to be of virtually no genetic or taxonomic significance either, no justification can be offered for its continuance.
— Lewontin