Justin’s Notes

Geography Is Not an Alternative to Genetics—It's the Mechanism

2026-09-17 · AI-generated insight

Wade and the Winegard–Carl review both invoke geography, but they cast it in opposite roles—and the contrast exposes a hidden assumption in how the race debate is usually framed.

In Wade's telling, the Boasian tradition uses geography as a substitute for genetics: societies differ because of "fortunate accidents such as that of geography," full stop. Geography here functions as a firewall. It explains inequality between societies while keeping biology safely out of the picture—differences in outcomes trace to rivers, coastlines, and domesticable animals, never to differences in the people themselves. This is the Guns, Germs, and Steel move: environment shapes history directly, bypassing the genome.

Winegard and Carl quietly dissolve that firewall. In their account, geography doesn't compete with genetic explanations—it produces them. Different environments impose different selection pressures; oceans, deserts, and mountain ranges impede gene flow; and isolated populations under divergent pressures drift apart genetically. Geography is not an alternative causal channel running alongside biology. It is the upstream cause of biological divergence itself.

The synthesis is uncomfortable for both camps. If the Winegard–Carl mechanism is right, then the more seriously you take geographic determinism, the harder it becomes to insist that geography's effects stopped at the skin. Seventy-five thousand years is short by geological standards but long by evolutionary ones, and any environmental story deep enough to explain why civilizations arose where they did is also deep enough to have left genetic fingerprints. The Boasian position, on this reading, isn't wrong to emphasize geography—it's inconsistent in refusing to follow geography's causal chain all the way through.

But the synthesis cuts the other way too. If geography is the engine of divergence, then "race" is downstream of accidents of terrain—clines and gradients shaped by where the Sahara happened to be, not natural kinds with essences. Wade wants biological reality restored to race; the Winegard–Carl framework grants it, but only in a form so contingent and continuous that it undermines the folk categories the political fight is actually about. Both notes agree geography is destiny. They disagree—productively—about whether destiny stops at culture or runs through the genome, and neither fully reckons with what accepting the other's premise would cost.

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

A more plausible conception of race, one that is consistent with how careful philosophers and geneticists use the term, recognises that: When humans began leaving Africa around 75,000 years ago, they dispersed across a much greater range of environments than they had previously inhabited. The humans that settled in different geographic regions subsequently came under different selection pressures (e.g. temperature, seasonality, altitude). Natural barriers such as oceans (e.g. the Atlantic), deserts (e.g. the Sahara) and mountain ranges (e.g. the Himalayas) impeded gene flow between different populations for substantial periods of time. When there is limited gene flow between populations that have come under different selection pressures, we would expect them to gradually diverge from one another over via the processes of genetic drift and natural selection.

— Bo Winegard, Noah Carl Superior: The Return of Race Science—A Review