If I can sort through your somewhat obfuscating rhetoric, I believe you are positing the psychological model a la Campbell and Jung. While this is valid to an undetermined (and perhaps undeterminable) degree, it does not explain all the similarities of various cultures. Do you deny any intercultural influences at all? Does the profusion "Celtic crosses" at the petroglyph site of Driekops Eiland near Kimberley, for instance, merely indicate that they are some mental artifact of the collective unconscious, and the San (Bushmen) were never actually visited by maritime cultures in South Africa? And what about the worldwide distribution of the swastika? Just another archetype of the mandala? [theorionzone.com]
You write: "There is a simpler explanation for culture; one DNA, one environment, one species, one consciousness. Same dreams, stories, calendar, ritual cycle, aspirations, technology, art, music, grammar."
Yes, we have one DNA, currently the human one (unless you consider the "alien DNA theory," which I do not). But human DNA can be mapped throughout time and space, and that is its great promise for a viable picture of our past. Neanderthal, Denisovan, Homo heidelbergensis, Homo erectus, and even in your neck of the woods, Homo naledi, etc. etc.--yes, human DNA is comprised of many strands that have verifiable histories. There are, for example, five different mitochondrial haplotypes of Native Americans, and they all points to different geographic sources. The renowned geneticist from Oxford University, Bryan Sykes, who in 1994 extracted DNA from the famous Ice Man of northern Italy, also weighs in on the matter of non-Beringian pathways to America. Citing the modern-day absence in eastern Siberia and Alaska of mitochondrial haplogroup B, he writes:
“…the curious absence of this clan from present-day inhabitants of Siberia and Alaska suggest to me that we may be seeing the genetic echo of a second seaborne colonization that took the coastal route north up the coast of Asia and down the Pacific coast of North America. The rapid sea-level rises which flooded so much of south-east Asia would have given a great incentive to find new land. Could it be that the same maritime migration that ultimately led to the colonization of the remote Pacific islands also led a different branch of this remarkable clan to seek new land to the north – a journey which led them through the polar waters and eventually to the temperate lands of Central America? What a voyage that would have been.”
One species? One consciousness? Imagine the qualitatively different consciousness(and cognitive dissonance) in that fated first meeting (and then mating) of Homo neanderthalensis and Homo sapiens!
Much as I would like to hold hands and sing kumbaya, our ancestral past was greatly determined by interactions between geographical disparate groups--sometimes amicable, sometimes hostile.