(recent edit: separating the original notes into separated distinct questions to put process of thoughts in a list)

There is an evolution of species from genetics, bone structure, environmental influences on biological needs (i.e. Darwin's finches) but what about the instinct or choice to build or nest shelters?

What would cause a built instinct to build in a specific matter for offspring?

What would the evidence be of humans?

Apes don't dig shelters but nest, did humans nest?

What environmental change cause nomadic and moving colonies of apes to solitary nomadic humans who could not survive without some instinct. Caves were used but what inspired them?

Why not some other evolutionary instinct?

If we went to caves, then what inspired our neolithic ancestors to build domes?, straight walls? geometric and mathematical sciences?

Why do we have the same standards but the evidence does not go far enough back to discuss our ancient architecture?

You can also consider the work and survival rate needed to build. Maternal or Paternal instinct to make a shelter?

Is there any research similar that I could receive?

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