I think the big difference here between hunter-gatherer and 3rd world poverty is that your stone-age people weren't living in the toxic waste dumps of an indust

I think the big difference here between hunter-gatherer and 3rd world poverty is that your stone-age people weren't living in the toxic waste dumps of an industrializing nation that doesn't care about the environment. Typical hunter gatherers would have had better nutrition and better access to clean water and the ability to relocate/move without the government forcing them into only certain areas.