Oppenheimer has come up with some interesting dates, and movements, of Southeast Asian peoples, much the same way that skeletons of Caucasoids (as distinct from Mongoloids and Negroids) have been found in the lands fringing the Pacific Ocean, or the skeletons of very tall humans (10 to 12 feet) have been found in the American mainland, or the huge, carved ‘Olmec’ heads found on Yucatan (Mesoamerican) soil, or a much earlier beginning to the Egypt of the pyramids than conventionally claimed.
Some of the great known unknowns in pre-history are: how the impossibly huge megaliths (stone blocks) used to construct the temples of pre-history were cut out, brought without using wheels to building sites, shaped without metal or electric tools, or placed into position displaying a lifting capacity not generally available in modern times; how the structure and stratification of society necessary for an advanced culture came about; the process whereby the needed administrative, organisational and (even) spiritual beliefs were achieved, without a long period of gestation, or identifying a source for learning by cultural diffusion; or whether an older civilisation of unknown provenance existing somewhere, at some distant past, had seeded primitive human societies to enable them to evolve into viable cultural entities – even if, in time, they displayed the truth of Newton’s Second Law of Thermodynamics – that entropy is unavoidable!
That is, progressive deterioration is a fact of all existence. While a prospect of subsequent renewal (as, say, in Hindu cosmology) may not have been explicit, the reality of our present civilisation may offer some hope that human existence in the Cosmos is eternal.
It is a truism that life forms, whether immobile (like plants), or mobile (like insects, animals, and humans) generally have simple beginnings and, subsequently, mature – in order to carry out their respective roles. Our babies demonstrate the truth of this process. Similarly, human societies need to evolve to higher levels of functioning through maturation.
Therefore, the sudden appearance of organically mature societies in Egypt, Sumer, Harappa, and possibly elsewhere about 5,000 to 6,000 years ago is surely impossible. They needed time to have evolved, whether through borrowing (cultural and technological diffusion), or by being guided by a more advanced civilisation. Rejecting input, realistically, from extra-terrestrials, we are left with a wondrous gap of knowledge about human predecessors.
Would not a quick look at Oppenheimer’s theory be now warranted, although I do not find the path he has traced through linguistics and genetics to be quite persuasive. Has he explained the origins, purpose, or the advanced technology manifest in the super-structures of Egypt, Mesoamerica and the Andes? Or, did all that come later?