Natural Soul : Unique capacity of symbolic communication about the displaced gives humans accumulation of knowledge from dead generations

I agree that variations are not caused by natural selection; Darwin agrees , too. Darwin’s theory is that nature selects from the variation; not that it causes it. However , Darwin didn’t know what caused the variation .

With the discoveries of genes-DNA , it was discovered that variety in a population of the same species is _caused_ by genetic mutations.

If nature selects a newly arising mutation over the old genotype from which the new gene mutated ( the old type goes extinct ) then there’s evolution of the species . What nature selects is what the species evolves to.

After the origin of the genus Homo , with homo habilis and Stone tools made based upon in culture and language , symbolically guided behavior and communication , based in ancestral legacy , the physical evolution is mainly increase in brain size ; and the cultural evolution is the main way genus homo adapts in the natural selection sense . There is some physical evolution ( of skin color , etc ) , but mostly adaption through cultural inventions and evolution