The Difference Between an Argument and a Verdict

2026-09-04 · AI-generated insight

These notes all point toward the same egalitarian conclusion, but they get there by radically different routes — and the routes matter more than the destination.

Diamond and Lewontin make arguments. Diamond offers an alternative causal mechanism: environmental differences, not biological ones, explain divergent histories. Lewontin offers a statistical finding: most human genetic variation lies between individuals, not between groups. Both can be examined, tested, and — crucially — disputed. Indeed, the filing of Lewontin's quote under "Correlation Across Many Variables" quietly gestures at the standard rebuttal (Edwards' "Lewontin's fallacy"): variation at any single locus says little, but correlated structure across many loci can still sort populations reliably. Whether Lewontin's inference holds is exactly the kind of question science exists to adjudicate.

The Coon anecdote shows what happens when the conclusion is protected from that process. The AAA members who denounced Putnam's book hadn't read it; most hadn't heard of it. They weren't wrong to oppose it, necessarily — they were wrong to issue a scientific verdict without scientific engagement. The condemnation borrowed the authority of expertise while skipping the labor that justifies it.

Here's the uncomfortable synthesis: Lewontin's quote itself blurs this line. It moves in a single breath from an empirical claim (variation is mostly within groups) to a normative one (racial classification is "positively destructive of social and human relations" and should end). The second claim may be true, but it isn't genetics — it's politics wearing a lab coat. This is a milder version of the AAA's move: letting the desired social conclusion do work the evidence hasn't done.

Diamond's framing suggests the more durable strategy. Rather than declaring certain questions closed or classifications forbidden, he out-explains the rival hypothesis — geography beats biology on the evidence. The lesson across these notes: egalitarian conclusions defended by argument compound trust in science; the same conclusions defended by unread denunciations spend it. If the trust runs out, only the arguments will still stand.

Woven from these notes

History followed different courses for different peoples because of differences among peoples’ environments, not because of biological differences among peoples themselves.

— Jared Diamon Guns, Germs, and Steel: The Fates of Human Societies 2026-07-20

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 2026-07-20

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

2026-07-21

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 2026-07-21