The genetics of intelligent radio

Mind Hacks

BBC Radio 4 has just concluded an excellent three-part series on the controversies over the genetics of intelligence and it’s one of the best and most nuanced discussions you’ll hear about the topic for many years.

The series is called Intelligence: Born Smart, Born Equal, Born Different and it’s carefully put together, wide in scope and doesn’t shy away from either tough science or difficult issues.

The only point I’d make about is one of context: most of the discussions apply to Western populations. This is not a point about race but one about environment.

Calculating heritability for a particular trait, in this case for cognitive function, involves working out how much of the difference between people is accounted for by genetics and the environment. But the result only holds for similar populations in similar environments.

For example, malnutrition, disease and high levels of environmental neurotoxins (e.g mercury from…

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