General intelligence was a statistical artifact discovered from testing. It basically a theory that if you do well on a history test you'll probably do well on a math test.

> West Africans and East African are of the same race

They have similar skin color, but that doesn't mean they're particularly closely related.

Black Africans have the by far biggest genetic diversity of any population. This is because our species evolved there, and has had the longest to develop variations. By contrast, the rest of humanity comes from relatively small populations of Africa emigrants.

As it happens the best long distance runners come from an region in East Africa, while the best sprinters come from a region in West Africa. This includes US sprinters.

https://www.theatlantic.com/international/archive/2012/04/wh...

> West Africans and East African are of the same race, but differ in the case of marathon outcomes. Why can’t this be true for intellect?

It can be. Among Africans Igbo show much higher levels of educational attainment than others. I’m sure there are other groups this is true of.

> Discrimination is not some leftist fantasy. Black Americans have been systematically deprived of quality environments for over 400 years. I am talking about truly horrific intellectual deprivation from making it illegal to read during slavery to living in highly polluted sections of segregated cities today. When we talk about intellectual disparities history needs to be part of the conversation.

I agree. For example Irish IQ scores were historically lower than English and this is no longer true.

I don't believe the person you're replying to said that discrimination is a fantasy, but it's not always the answer either. It's important to study the situations so that we can identify when each is the culprit or how much of a factor they are.

Yes, if people have other better opportunities then they’re likely to pursue those. I highly doubt they dissipate entirely, if only because biomechanics don’t change. Being tall and skinny with long legs compared to most people will place those of East African ancestry at an advantage for long distance running regardless of culture. As the East African diaspora increases you’ll see more nationalities represented among successful long distance runners but I doubt there’ll be much dispersion in the ancestry of successful long distance runners. The West African diaspora are dominant in sprinting worldwide to a ridiculous extent. I think there are two men ever who don’t fit that profile among those who have run 100m in under ten seconds.

Not much though I’m sure there’s some cultural contribution. Cricket is really only played seriously in former British colonies whereas you can run a marathon with over a 1,000 competitors at least once a year in almost every city in OECD countries. For middle income countries the Mexico City Marathon was founded in 1983 and there appears to be at least 10 marathons annually in South Africa. I’ve run in the Shanghai Marathon and there must have been 10,000 competitors.

Long distance running is a good candidate for second least culture bound sport, after sprinting.

East African also overstates the relevant population group. Among East Africans the Kalenjin, an ethnolinguistic group are themselves dominant.

https://pdfs.semanticscholar.org/9b58/9a401e65cb8bbd1f3cacb6...

The dominance of Kenyans in distance running

Kenyan runners, and especially those originating from the Kalenjin tribe, have dominated international middle- and long-distance running for over 40 years, prompting significant interest in the factors contributing to their success. Proposed explanations have included environmental factors, psychological advantage and favourable physiological characteristics, which may be genetically conferred or environmentally determined. Running is inherent within local Kenyan tradition and culture, and the Kenyan way of life, which involves many outdoor activities and pastimes in addition to mostly unfavourable living conditions, is conducive to enhanced distance running performance. Despite economic deprivation, Kenya has produced world and international running cham- pions repeatedly over the past few decades; these champions have become role models for the younger gener- ations, who take up running in the hope of a better future for themselves. Favourable environmental conditions such as altitude, diet and anthropometry, in addition to the motivational and socio-economic factors mentioned above, have all been proposed as possible reasons for the unsurpassed achievements of Kenyan dis- tance runners. However, the fact that the majority of internationally successful runners originate from a small tribe that accounts for approximately 3% of the total Kenyan population also points to a possible genetic component. Whether this is subject to influence from other co-factors, such as altitude or training effects acquired during childhood, remains as yet unresolved.