> Mesoamerica, South America, Mesopotamia, Indus/Ganges, and China (all of which are also clearly independent origins of civilization) I don't think it's settl

> Mesoamerica, South America, Mesopotamia, Indus/Ganges, and China (all of which are also clearly independent origins of civilization) I don't think it's settled that these are independent. Especially Mesopotamia and Indus Valley, and Meso and South America.