This was a practical effort to evaluate the possibilities and the limitations faced by these stone age seafarers. He is successful in doing just that.
Two principal routes have been espoused for the peopling of he Americas. The earliest been the ice age sea route that allowed mariners to travel the Pacific Coast from Asia down through to the tip of South America starting around 20,000 years ago when making the sprint across the top of the Alaskan gulf was possible. They relied on sea food for sustenance including seals and walruses.
The second route was the late opening of the passage between the Cordilleran Ice Sheet and The Laurentide Ice sheet after the Pleistocene Nonconformity, allowing big game dependent hunters to break into North America from the Bering North Slope. These are the folks who perhaps created and used the Folsom point to take down the large game around them.
I was an early fan of the sea route and of course welcome the steady addition of evidentuary support. So perhaps I am a little biased. The point that I make in my book Paradigms Shift is very simple and is based on anthropological reports of hunter gatherers living in a productive ecosystem. It is that a successful group that is able to occupy a hunting ground like a fishing village will have an increase in population over the carrying capacity of the range. This will lead to a calving off of a subset of sufficient young people who will then march over to the next empty hunting range or in the case of the coast, the next available safe landing and build a new settlement. This has been going on forever.
Jon Turk imagines intrepid voyagers who imagined a new world a thousand mile away. I imagine brave young men who scouted out a suitable location forty miles away and then dragged their wifes there while promising to visit home often. Generation after generation others followed these stepping stones and helped create stepping stones themselves, until they faced long barriers of ice that made return unlikely. Eventually a few would make the sprint, or conditions ameliorated enough to make it easier. In any event, in a thousand years or so, their descendants were moving south along the coast into constantly improving conditions.
What Jon shows us is that it was all very possible and actually inevitable using the skin boats of the time and place. The folk most likely were living throughout the Siberian coast merely including Northern Japan. In fact we have every reason to suspect that these mariners were also the same stock as the Polynesians and other early stock that made up the populations of 20,000 years ago. Remember that the onset of agriculture selected through population growth several small tribal groups who then became large enough to largely impose their genetic characteristics onto the remaining populations. The Han Chinese is perhaps the best example but is hardly unique.
Our scholars of the past have been so bound up in attempting to classify peoples as to their characteristics, that they have often been blinded to the obvious. What woke me up was a photo of a crowd of people in the Tibetan mountains. Their features could have been dropped in among the Haida and no one would have noticed. In fact the northern global root stock is discernible as such and it differentiated across Asia Europe and the Americas during the past 20,000 years. Were differentiation was minimized was in those areas where agriculture was a latecomer or never arrived and the tribal ethos was sustained. This describes the Haida and the Tibetans and other constrained northern populations.
Jon shows us both that the the challenges were daunting in the extreme but yes they could be mastered. And yes, men would die. His own trip rolled the dice several times and it is a surety that ten such trips would kill someone sooner or later. Jon of course, made no serious effort to live off the sea on this trip. It would be neat to retrace part of the route with an Australian bushman aboard just to gain his insight of even for him is a hostile foreign environment. His instincts may inform us.