But the lifestyle of the modern Bushman is rather different these days:

http://www.nationalgeographic.com/ngm/0102/feature6/

using bitumen from car tyres? At one time the gum for a glue needed to be collected/extracted. Now Bushmen (proper name 'San' ? or is that a different group?) have metal knives that don't wear out. Before they would have had to find good stone and make blades. They keep herds these days, probably have in a Lapp-style way that I mentioned earlier. But today they have barbed wire to keep them under control while stationery - no more building fences when they stop.

So much more is available now that figures of any modern society can not possibly reflect a 'similar' society of 5000 years ago.