This statement is subject to inverse survivor bias, gatherers and pastoral societies tended to not run out, they tended to move instead.
Agriculture based early societies tended to run out or get decimated by plagues, thus leaving concentrated evidence of their passing.
However due to the one way early ones are tracked by looking at stable settlements, the evidence is stacked against the nomadic ones. While what they often had is meeting places rather than residences. What we find is megaliths, but not the settled cities to support their building.
If you move and properly do not leave much behind, there will be no evidence left.m, especially after centuries, sometimes even years.
This statement is subject to inverse survivor bias, gatherers and pastoral societies tended to not run out, they tended to move instead. Agriculture based early societies tended to run out or get decimated by plagues, thus leaving concentrated evidence of their passing.
However due to the one way early ones are tracked by looking at stable settlements, the evidence is stacked against the nomadic ones. While what they often had is meeting places rather than residences. What we find is megaliths, but not the settled cities to support their building.
If you move and properly do not leave much behind, there will be no evidence left.m, especially after centuries, sometimes even years.