[BwanaNdege]

Let’s start with sub-Saharan architecture - huts made from sticks and mud similar to what a beaver can build.

American sod houses

Saskatchewan Sod House - 1900 (colorized image)

[Trailerpark Badass]

Lol, these people were on a frontier, an unsettled wilderness (well, settled by stone-age cultures).They weren't in the midst of where bipedal humanoids first developed.

Question, how long was it before those sod houses were accompanied by cities of wood-frame and quarried-stone buildings?

[Trailerpark Badass]

And, btw, those people were descendants of those who crossed glaciers and oceans, and who had left the relative safety of a millenia-old civilization to established new outposts of civilization, through nothing but the fruits of their own effort and ingenuity.

Your pictures tell alot, just not what you intended.

[Ozark Tom]

Grass as far as the eye can see, and no trees for lumber, nor stone evident. Rolled up in a wagon and used available material for first homestead accommodations.

[the OlLine Rebel]

Notice the other technology in those pix. Just being resourceful with what is abailable.

They are more advanced than those for which you try to play devil’s advocate.