It is likely that the large terrestrial mammal biomass of these regions supported substantial human populations with subsistence and manufacturing patterns similar to those of ethnographically known forager.
Human behaviors of the archaeological past were seen as nearly identical to those described ethnographically and thus, they could be studied with minimal training in archaeology.
It has been produced in many contexts throughout human history, although the majority of rock art that has been ethnographically recorded has been produced as a part of ritual.
