The following graph compares mean number of children, by intelligence as measured by Wordsum*, among whites (n = 13,492), among blacks (n = 3,858), and also among Mormons (n = 342). To avoid language fluency issues, only those born in the US are considered:
This is astounding. Are Mormons the only group in the US of significant size that breeds today like the English of centuries ago did?
Not only has modern contraception decoupled fornication from procreation, it has also severed the relationship between intelligence and reproduction likely unprecedented in human history.
Parenthetically, this isn’t the only instance that the severe dysgenic trend among American blacks has come up. It’s markedly more pronounced than the trends for non-black groups are. Since IQ itself remains a mostly taboo topic, it’s no surprise that black dysgenics are never invoked as a potential explanation for worsening levels of black dysfunction over the last couple of generations.
GSS variables used: BORN(1), ETHNIC(7-15,18,19,21,23-27), RACE(2), OTHER(61,64), CHILDS, WORDSUM(0-5)(6-7)(8-10)
* The total population distribution under this classification breaks down as 36%/40%/24% low/middling/high intelligence. This is as close to a 33%/33%/33% split as is attainable given the Wordsum’s 10-point scale.