As the title says, what PoD would be required to swap the histories of America and Europe, so America achieves civilisation first, crosses the Atlantic and colonises Europe, in reverse to OTL?
A PoD that involves no Sumer, Egypt, Mohenjo-Daro or any other earlyAs the title says, what PoD would be required to swap the histories of America and Europe, so America achieves civilisation first, crosses the Atlantic and colonises Europe, in reverse to OTL?