Justin’s Notes

The Caveats Are the Evidence: How Warne's Hedging Proves Wade's Thesis

2026-07-27 · AI-generated insight

Read side by side, these notes do something the authors may not have intended: Russell Warne's paper becomes an exhibit in Nicholas Wade's case.

Wade argues that social science operates under a political prohibition—Boas's doctrine that behavior is "shaped only by culture"—which forces researchers to locate all group differences in environment and accident. If that prohibition were merely intellectual history, Warne's paper would read like any other empirical result. Instead, look at what it has to do to survive.

Warne's title claims that between-group intelligence differences are ">0% genetically caused." That is nearly the weakest non-trivial assertion a scientist can make—the mathematical floor above pure environmentalism. He marshals five converging lines of evidence only to conclude that "the data are not fully conclusive." Most striking is the final sentence quarantining the claim to "native English speakers born in the United States and not necessarily to any other human populations." The armor is remarkable given the ordnance behind it.

Contrast this with the consensus Warne himself reports on individual differences: genetic-plus-environmental, stated plainly, unhedged. The science is structurally identical; only the target has changed. The gap between how freely one can discuss within-group heritability and how gingerly one must approach between-group means is precisely the political asymmetry Wade names. Nobody appends "this applies only to native English speakers" to a paper on the heritability of height.

So the connection is not that both notes discuss the biology of race. It is that Warne's rhetorical caution is data for Wade's sociological claim. A field with no taboo produces confident papers; a field policed by an inherited doctrine produces papers that hedge a minimal claim into oblivion. Wade tells us the orthodoxy shapes what can be said. Warne, in the careful contortions of his abstract, shows us exactly what that shaping looks like from the inside—not as suppression, but as a scientist rationing his own conclusions before anyone else can.

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 past 30 years of research in intelligence has produced a wealth of knowledge about the causes and consequences of differences in intelligence between individuals, and today mainstream opinion is that individual differences in intelligence are caused by both genetic and environmental influences. Much more contentious is the discussion over the cause of mean intelligence differences between racial or ethnic groups. In contrast to the general consensus that interindividual differences are both genetic and environmental in origin, some claim that mean intelligence differences between racial groups are completely environmental in origin, whereas others postulate a mix of genetic and environmental causes. In this article I discuss 5 lines of research that provide evidence that mean differences in intelligence between racial and ethnic groups are partially genetic. These lines of evidence are findings in support of Spearman’s hypothesis, consistent results from tests of measurement invariance across American racial groups, the mathematical relationship that exists for between-group and within-group sources of heritability, genomic data derived from genome-wide association studies of intelligence and polygenic scores applied to diverse samples, and admixture studies. I also discuss future potential lines of evidence regarding the causes of average group differences across racial groups. However, the data are not fully conclusive, and the exact degree to which genes influence intergroup mean differences in intelligence is not known. This discussion applies only to native English speakers born in the United States and not necessarily to any other human populations.
— Russell Warne Between-Group Mean Differences in Intelligence in the United States Are >0% Genetically Caused: Five Converging Lines of Evidence