Justin’s Notes

Judging by the Nose: When Refusing to Aggregate Evidence Becomes a Method

2026-08-31 · AI-generated insight

There's a structural rhyme running through these notes that goes deeper than their shared topic. Lewontin's famous argument — that most genetic variation lies within populations rather than between them — turns out, per Winegard and Carl, to depend on examining one locus at a time. Their analogy is memorable: you can't sex a face by nose size alone, but consider all features together and the classification becomes trivial. The statistical error is refusing to aggregate: keeping each piece of evidence isolated so that no pattern can emerge.

Now look at the Coon anecdote. The AAA members who voted to denounce Putnam's book hadn't read it; most hadn't heard of it. They too were judging without aggregating — condemning a work on the basis of a single signal (its reputation among a few upset colleagues) rather than the full evidence available to anyone willing to look. In both cases, the epistemically thin procedure wasn't an accident. It produced the conclusion that felt morally necessary, and a more thorough procedure risked producing one that didn't.

This reframes what's happening in Lewontin's own passage. Notice how quickly it moves from a statistical finding to "no justification can be offered" for racial classification — the empirical claim was load-bearing for a moral one. That's precisely the arrangement Coon's story warns against: once a scientific claim is doing moral work, the incentive to scrutinize its methodology inverts. Correcting Lewontin's statistics stops being a technical improvement and starts feeling like an ethical transgression, which is presumably why the correlation-across-loci point took decades to become common knowledge despite being, as the face analogy shows, intuitively graspable.

The deeper lesson isn't about race at all. It's that "condemnation without examination" and "analysis without aggregation" are the same failure mode at different scales — both are ways of arranging your inputs so the inquiry can't surprise you. A field that tolerates one will tend to produce the other.

Woven from these notes

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
— Lewontin

In brief, Lewontin ignored the fact that differences among human populations are correlated. Although population variation at any one genetic locus tends to be small, global population structure becomes clear if one examines correlated differences across loci. For a simple analogy, consider men and women’s faces. If one takes any particular characteristic, say nose size, there is likely to be more variation within a sex than between the sexes (and it would be nearly impossible to classify faces by sex with any accuracy using only nose size). However, if one considers all facial characteristics together (which is, after all, how we actually experience human faces), then sex differences become sufficiently clear that an observer can guess the correct sex more than 95 percent of the time.

— 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