Justin’s Notes

The Bet on Barriers: Divergence Was Geography's Accident, Not Nature's Verdict

2026-08-30 · AI-generated insight

Winegard and Carl's account of human population divergence contains a detail that quietly undermines the Chinese strategic worldview Thayer describes. In their telling, the differences between human populations are not deep essences but artifacts of obstacles — oceans, deserts, mountain ranges that impeded gene flow for stretches of evolutionary time. Divergence happened because populations couldn't mix, not because they shouldn't. Remove the barriers and the process runs in reverse.

This reframes what multiculturalism actually is. The Chinese critique Thayer reports treats America's diversity as a sickness — a departure from the healthy, unicultural norm. But if the Winegard–Carl picture is right, the 'norm' of separated, internally coherent populations was never a design principle; it was a contingent consequence of the Sahara and the Atlantic. Modernity — shipping, flight, migration — dissolved the barriers, and America is simply the place where that dissolution is furthest along. It is running the experiment that geography once forbade.

So the US–China divergence becomes a wager about which accident of history to institutionalize. China is betting that the cohesion produced by long isolation is a durable strategic asset worth preserving — that homogeneity is strength. America, at least implicitly, is betting that recombination is the asset: that populations shaped by different selection pressures and different cultural histories, when mixed, produce something more adaptive than any lineage alone. Notably, this is exactly what happens genetically when isolated populations reconnect — hybrid populations often gain, not lose, fitness.

The irony Thayer's own framing suggests: the Chinese confidence in homogeneity rests on treating race as a fixed essence, precisely the 'folk' conception that careful geneticists reject. If the divergences are shallow, recent, and barrier-dependent, then the strength China perceives in unicultural cohesion may be real in the short run but is defending a boundary the modern world has already erased. The strategic question isn't whether mixing is a sickness — it's which power correctly reads how temporary the separation always was.

Woven from these notes

From the Chinese perspective, the United States used to be a strong society that the Chinese respected when it was unicultural, defined by the centrality of Anglo-­Protestant culture at the core of American national identity aligned with the political ideology of liberalism, the rule of law, and free market capitalism. The Chinese see multiculturalism as a sickness that has overtaken the United States, and a component of U.S. decline.
— Thayer THE STRATEGIC CONSEQUENCES OF CHINESE RACISM: A Strategic Asymmetry for the United States

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