Don't leave out the POC in the Indian subcontinent and China/East Asia.
Based on the impressive achievements of the various Mesoamerican cultures and the Inca, the Native Americans might have gotten there in time. Mesoamerica had writing and was working gold and silver, but hadn't made the leap to metal weapons and tools. That's a developmental curiosity.
Then there are the parts of the world that neither developed writing nor developed beyond the Stone Age. The descendants of these cultures are what the current fuss is mostly about.
Don’t leave out the POC in the Indian subcontinent and China/East Asia.
The Aztecs had a written language but the Incas did not.