Do you have actual evidence of this? It sounds not only like you made it up, but that it is exteremely unlikely to be true. Foraging communities still likely had elders, shaman, chiefs, etc, and it seems likely these people had some perks for their leadership, and must have given orders. Indeed, any kind of large-game hunting requires someone to give orders, and is likely to lead to unequal status-based distribution of goods. Unless we have knowledge of pre-history that contradicts this…

In colonial United States, England usually appointed english-born people to rule. … The whole “need to be born in the US to run for president” thing was not an afterthought.

Right, except that the framersexempted anyone born before the adoption of the Constitution, thus allowing foreign-born Englishmen currently alive.

No person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution

Commentators interpret the declining influence of traditional authority and institutions as proof that people have become less deferential and possess more critical attitudes than in the past. However, it is less frequently noted that deference to traditional authority has given way to the reverence of expertise. …

(Could you pass on a citation for the empirics you mentioned, comparing the children of 18yo mothers to 35+yo mothers? I don’t particularly doubt you, but it’s the sort of thing that’s counterintuitive enough to demand a reference.)