Research by Kanazawa and MacIntosh unwittingly supports Genetic Entropy/Darwin Devolves/Crumbling Genome
Satoshi Kanazawa conducted a study that showed Darwinism is causing loss of IQ because very smart women have a higher incidence of childlessness.
See "Intelligence and Childlessness"
https://www.sciencedirect.com/science/article/pii/S0049089X14001276
This is consistent with NUMEROUS observations that brain-dead, stupid, unthinking Darwinian processes lay waste to good designs in the process of increasing reproductive efficiency. Exactly the opposite of what Darwin postulated. Evolutionary biolgist Allen Orr conceded, Darwinism is HAPPY to lay waste to designs we associate with engineering. Unfortunately Orr (like Lewontin) thinks that Darwinism make designs in the first place (and they do so without any proof, ref Masotoshi Nei).
We can have a fast individual (like Olympic sprinter Usain Bolt) and a smart individual (like Einstein). Along comes a lion that takes out Einstein from the gene pool. See how brain-dead, stupid, unthinking Darwinian process can cause loss of otherwise good designs!
In other words, "Darwinism works except when it doesn't." And how much effort have evolutionary biologists spent in estimating the A PRIORI odds that Darwinism will work as advertised vs the odds it doesn't. Like ZERO effort. They just accept Darwinism works most of the time without any attempt at rigorous thought. But experimental data is hard to ignore, unless one is an evolutionary biologist blinded by faith in brain-dead, stupid, unthinking Darwinian processes.
Additionally, Alison Macintosh, studying the bones of prehistoric females concluded they were as good or better than today's elite athletes. She attributes the females being so strong to the hard life-style they lived. She has NO proof that is the fundamental cause. She, like her colleagues conclude it was because of their lifestyle, but the one thing they refuse to consider is that the genome has deteriorated.
>Prehistoric Women Had Stronger Arms Than Modern Athletes
>Bones from Europe show that women worked so hard during the dawn of farming they were almost uniformly buffer than today's elite rowers.
Our ancestors had bigger brains, better muscles, better bones, etc. They were smarter, faster, stronger.