I’m familiar with these objections. But they’re more objections to DeMeo’s claim that desertification caused this shift, which if true should have included all the cultures in that region, including the Kabyle culture, as Grasshoff was pointing out.
But if this were introduced, not by climate change, but by the method I’m speaking of, then this doesn’t conflict. Some cultures would not have been affected. Only those where groups with these characteristics integrated. Other cultures in between would be left unaffected.
For example …
“In modern times, it is precisely in the most difficult terrains (and therefore the most inaccessible to conquest) that most matrix cultures have lasted the longest: in remote highlands and deserts, and some islands or peninsulas.”
This is not consistent with DeMeo’s claims that these “difficult terrains” were the catalyst of the behavior change, but are consistent with my claim that these regions were not reached by those who carried these characteristics.
Do me a favor and check out Steve Taylor’s book before you dismiss this.