[tallhappy]

No. Where does the idea that species are defined by simply not breeding, not the inability to breed and produce offspring?

A thousand years ago people in Africa, Europe and America would have been different species.

[realpatriot71]

A thousand years ago people in Africa, Europe and America would have been different species

This would be true if when these humans met they did not breed. Separate species when placed together will not breed with each other for various reasons as mentioned before. Humans, being rational, can choose not to breed, but we obviously can.