This is astounding. Are Mormons the only group in the US of significant size that breeds today like the English of centuries ago did?
This is indeed very encouraging and surprising.
The main “problem” with religious high fertility is that they are duller than average. But if reproduction trends within those groups are themselves highly eugenic, then that might cancel things out.
However, some questions we need to ask before we rush off to adopt the Theocracy civic:
1. Does this apply to apply to high-religious/high-fertility groups other than Mormons? Or is this something specific to Mormonism?
2. At what age do brighter vs. duller Mormons reproduce? Tempo effects are also important.
3. Does this apply to all Mormons, or just the older generation?
4. There is considerable outflow from the LDS Church (e.g. /r/exmormon), and they tend to be the brighter ones, like “dissidents” usually are. High IQ Mormons are a select group, considering especially that this is a very constrictive religion (no tea/coffee WTF, I’d sooner be a Salafi Muslim).
To what extent does this annul the higher fertility of high IQ Mormons?