George Francis Profile picture
Sep 5, 2022 6 tweets 2 min read Read on X
New blog post - Dysgenics by the Numbers: Quantifying the Fall of Civilization.

After looking through the literature I estimate that the global average IQ will reach 74 by the year 2100. Image
How do I get this number?

My prediction combines the rate of genetic decline within nations (0.6 IQ points per decade) and the rate of dysgenics between countries.

Low IQ countries have a much higher fertility rate which will take a while to fall to the replacement rate.
Whilst Africa had a population of 200 million in 1800 the UN predicts Sub-Saharan Africa will have a population of 4 billion by 2100.

This will dramatically reduce per capita welfare in the world. Image
So what if the global average IQ falls to 74 by 2100? Does this matter?

Using up-to-date estimates of the effect of IQ on GDP, I find that dysgenics will reduce GDP per capita by 30% by 2050 and 58% by 2100.

By contrast, climate change is predicted to cost us only 4% by 2050.
If you want to learn more about the numbers behind these calculations, then you should read the whole blog at Anglo Reaction.

georgefrancis.substack.com/p/dysgenics-by…
Can anyone see the gif in the article? It seems to be intermittent when I read it with Google Chrome.

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More from @MrGeorgeFrancis

Feb 16, 2023
In England, 36% of Pakistani marriages are cousin marriages. How does this consanguinity affect health outcomes in England?

A new paper estimates that inbreeding is responsible for 10% of type 2 diabetes cases & 8% of Asthma cases among British Pakistanis. Image
The estimated level of parental relatedness for British Pakistanis is shown below. It should be noted that this is a select group of Pakistanis who volunteer their DNA for research. I'd guess relatedness and the effect of inbreeding in the population are being underestimated. Image
It's a shame the authors didn't look at the effect of inbreeding on IQ among Pakistanis - a prior paper finds inbreeding associated with low IQ. The South Asians in the G&H cohort had levels of "autozygosity" three standard deviations above the norm of Europeans in the UK biobank Image
Read 6 tweets
Feb 5, 2023
The think tank @ukonward has published a survey of 47,000 people asking whether they trust others.

Areas with high trust were prosperous and had less crime. They also said, “[an] area where there is a lack of correlation is ethnic diversity."

But that wasn't quite true...🧵 Image
The dataset is publicly available. When I dived into the data I found rather different results.

MSOAs (Middle Super Output Areas) with more white White people had higher levels of social trust. Image
Different ethnic groups are associated with varying levels of trust. Places with more East Asians tend to have more trust, whilst areas with more Blacks tend to have lower trust.

The Simpson Index, a measure of ethnic homogeneity predicts higher trust. Image
Read 6 tweets
Dec 2, 2022
New study surveying 581 anthropologists and psychologists who work in evolutionary subfields.

They were asked whether there were "Population differences from different ancestral ecologies/environments"

74% said yes. Only 11% said no. Human Biodiversity I the academic consensus Image
Here are the rest of the results and the link to the study.

sciencedirect.com/science/articl…
Image
The results are similar to the most recent survey of intelligence researchers where only 16% deny a genotypic role in the black-white IQ gap. If anything, opinion has moved in the HBD direction over time.

emilkirkegaard.dk/en/2020/04/exp…
Read 4 tweets
Oct 22, 2022
The GCSE Mystery - new blog post from Simon Wright @Leaveme58694423 and myself.

In the GCSE exam given to almost all 16-year-olds in England, the black-white IQ gap has plummeted since ~2005. Now the gap is a trivial 2 IQ points.

Is England a utopian, post-racial society? Image
Strangely, whatever has caused the gap to shrink on GCSEs has not affected attainment on any other test.

In the A-level test given to 18-year-olds, there's still a large black-white gap. At university there are also large racial gaps. Image
To get a fair comparison, we matched the black-white GCSE gaps to gaps on IQ tests taken by the same cohorts in the same years.

The black-white IQ gap is around 10 points and not falling.

Blacks aren't getting smarter - something strange is going on with GCSEs. Image
Read 7 tweets
Sep 16, 2022
New paper from me and @KirkegaardEmil: National Intelligence and Economic Growth: a Bayesian Update.

National IQ strongly correlates very well with GDP per capita. We ask whether national IQ is the best explanation of economic growth and whether it is causal.

We say yes! 🧵 Image
How do we know whether IQ is the best predictor? We need to test it against many other theories - institutions, culture etc but they can't all fit in one model!

So we use 'Bayesian model averaging', running hundreds of thousands of regressions and taking a weighted average.
The method gives two key statistics.

1. the posterior inclusion probability (PIP), which is the probability a variable should be in a model of economic growth.
and
2. The standardised coefficient - the estimated effect of a variable on economic growth.
Read 10 tweets
Jun 1, 2022
New data from Scott Alexander shows that the birth order effect is very real.

Looks like it is due to nurture:
- birth order effect is the same for related and unrelated siblings
- birth order effect diminishes with a larger age gap

Thoughts below 🧵
astralcodexten.substack.com/p/birth-order-…
- Falling fertility has led to better investment in children, compensating for dysgenic decline
- You should consider diminishing returns to children in fertility choices
- You can improve judgement of your partner's genetic quality, looking at the success of the older sibling
You should want your first son to be the first child. The evidence suggests that the sex of the older sibling does not matter for the birth effect.

Men have a higher variance in life outcomes and thus have a higher expected return on additional investment.
Read 5 tweets

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