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[–]seyda 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (3 children)

Regression to the mean. Tall parents tend to have kids shorter than themselves, short parents tend to have kids taller than themselves, smart parents tend to have kids dumber than themselves. Here is an in depth article about it in regards to IQ

https://humanvarieties.org/2013/04/18/iq-regression-to-the-mean-the-genetic-prediction-vindicated/

This will be a problem especially if you are filtering for individual excellence, which is a personal moral achievement and which history clearly shows is not reliably hereditary. You can keep the population obedient through a good religion but you cannot expect the same individual quality for the great grandkids as for the original, rare individuals who chose to join. Eventually you will have a population of average genetics relative to the inherited population stock.

[–]fschmidt[S] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (2 children)

The paper you linked to is incoherent because it doesn't start by defining exactly what it means by "regression to the mean". Even if "tall parents tend to have kids shorter than themselves" I would assume that their kids would still tend to be taller than the average. And so adding tall people to a gene pool would make that population taller. If you keep adding tall people to a population and you let some random people in the population leave (by marrying out) then that population will increase in height. This is basic breeding.

[–]seyda 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (1 child)

Whites have an average IQ one standard deviation higher than blacks so a black with a 130 IQ will be a greater outlier than a 130 IQ white and due to regression to the mean of his race his descendants will be above average but closer to average than the outlier was.

[–]fschmidt[S] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

Based on this reasoning I should only accept Ashkenazi Jews and Brahmin Indians. But the bottom line is that the children of parents (of any race) with a 160 IQ will generally be smarter than the average of any race. What you say is true but isn't significant if the Go skill requirements increase over time as the IQ of the group increases. Breeding works. You can take an inferior stock and breed them to be superior over time by using selection.