system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why are uncontacted tribes still living as hunter gatherers? Why did they not move in to the neolithic stage of human social development?
gpt
The documentary "Guns Germs and Steel" tells exactly why this is the case.  Basically, it breaks down to the availability of resources necessary to reduce human labor to the point that farming is possible.

Large domesticated animals and soil good for planting are both required for farming, and those tribes generally have access to neither, just as a mere coincidence of their location.