Based on a number of lines of evidence, I would suspect nearly everything related to early art (including abstraction) was done in africa first and radiated from there (from the Out of Africa hypothesis, see https://en.wikipedia.org/wiki/Recent_African_origin_of_moder...)
The history of anthropology is full of pushing events back as we improve our methods.
The history of anthropology is full of pushing events back as we improve our methods.