Good luck getting the genetic data. A lot of tribes in the US have been taken advantage of by universities to get grant money with no real benefit for the tribe. Some tribes have even gone so far to restrict research data. One reason I use tarsnap is that the encrypted locally data complies with the local tribal resolutions on data sharing.
Curious how tarsnap relates to this?
For instance, Indonesia would have been connected to Australia more or less and so one could cross over land from Southeast Asia to Australia.
At the last glacial maximum (and sea-level minimum), the big islands of Sumatra, Java, and Borneo would have been portions of a massive Southeast Asia peninsula. In addition, New Guinea would have been attached to Australia. The other Indonesian islands, such as Sulawesi and Timor, would still have been islands. The gaps between the islands would be somewhat smaller, perhaps about 25mi (even between Timor and Australia), which is close enough that you can sail between them without ever losing sight of land.
It's amazing how in a short period of time ( in geological terms though it seems like a lot of time for us ), how much of the earth changed.
Another interesting tidbit, we had a little ice age not too long ago which ended in the mid 1800s.
They skipped over a lot of good farm land, and ended up in Northern Alberta for no discernible reason other than they knew how to deal with it. The problems made sense to their skill sets, and they did very well.
As the other person said, familial support is darned important, which is why my family went to Kansas in the first place. They had relatives there. It was recent enough that my grandmother has gone there to visit her cousins over the years.
I imagine that successful hunter-gatherer groups colonised over the next hill, or a days walk or two down the river. Probably someone could model that to narrow down prospective digs. I know that the land between the confluence of two rivers was a common place for groups to meet up.
I guess my family also provides a modern example of far colonising. The way they bridged the Atlantic was by sending a few young men ahead to scout out new potential homelands. I suspect that they used this as a sort of social control, and to add a useful function to the young men who were disruptive agents in their society.
In a hunter-gather society, this tactic would be better than straight banishment or death. "Climb that mountain pass and see if there is good land on the other side. Prove the land by staying over summer, and come back in the fall with skins and dried berries".
We also keep talking about this in terms of rejection (being banned, escaping parents etc), but it might well be that they were simply pushed by a reckless sense of exploration, curiosity, and personal ambition. Their world was endlessly new: what is beyond that hill? What is beyond that river? I'll find out, and if it's good, I'll make it mine. After all I'm a teenager, I obviously cannot die.
Right on. There are a lot of instincts humans show in developed society that work great in a hunter-gatherer society, including this one. See also:
I've got a little taste of it myself. I casually hiked and camped in the Northern Rockies for years. I didn't realize how many small bits of specific knowledge I'd picked up until recently moving to the midwest and doing some camping here. Different woods, that burn differerently. Damper conditions in general that make for all kinds of different prep. My knowledge of what is safe to eat (and what is not) went from fairly extensive to almost nothing. Different geography and climate that changes what you want in a campsite and what sort of site you are likely to find. A thousand little things that each make a difference.
With only stone age kit and knowledge base, moving out of your "home range" would have doubtless been quite challenging.
I'd had that phenomena explained to me in University as a result of the feudal states (serfdom was only officially abolished in 1861) that the Russian people left to come to North America - back home those trees would have been the lord's property, but here it could be theirs - so even though there was better arable land even in southern Alberta (assuming you could deal with the fact that the land in basically a desert), they traveled where there were "valuable" resources they wouldn't have had access to in the old country.
Suddenly changing climactic zone is also probably difficult as the different climate, flora and fauna might require very different sets of skills.
First off, you don't know where you're going, at all. You have never been more than 20-30 miles from your home base, and neither has anyone out of the 30-40 people you know.
The world is dangerous, there are lions and bears and worse everywhere, let alone the unknown things that you probably believe in. Camping out in the open is incredible dangerous. You much prefer to stick to places you know and have feel safe in.
You have to think about why you're moving. There are two major reasons for going anywhere.
First, something dangerous has come. A pack of wolves that like to eat people , a forest fire, a food shortage, another group of humans (not all bad, now you have some trade, but this was probably also a major danger with fighting for territory/reproduction). This drives you just far enough away to escape the danger, and there's always a chance you'll come back to the familiar territory when the danger has passed.
Secondly, your group has grown and has started acting like two groups. This new group will probably only move next door. There will still be familial bonds and cooperation. Add in that the population isn't growing all that fast and this is very slow movement.
You have to think how and what you're moving. You do not have a backpack. You have a bunch of baskets and maybe a couple of (literal dead animal) bladders of water. You can only take what you can carry, if the wheel had been invented it probably can't get over the terrain you're on. You need to stick to freshwater, so you can go down a river, and maybe chance along the coast hoping to get to another river a day or so away. Your group consists of babies that need carrying, children that need protecting, old people that know stuff but are slow, and more mouths to feed than you would like. Also bear in mind you were walking on game trails no human had ever walked on in bare feet/crap shoes at best. You also need to make fire (or take it with you) every night.
Finding a rive will basically stop any travel, they are a great place to fish/hunt and have accessible water. So actually coming across a usable river is likely to slow your advance by a couple of decades/centuries at the least.
Long story short, going anywhere more than a day away in pre-history was scary, dangerous and very very hard, and moving next door was a lot easier.
https://en.wikipedia.org/wiki/Wolf_of_Soissons (This was in the 1700's in Europe, they had guns and steel. Imagine having only leather and stone tools.
Bison have a daily range of about 2 mi. (3.2 km). This would give a seasonal range (over 90 days) of only 200 miles (320km) or so , and likely far less.