So with a POD of 1900 have Mexico be a first world nation, and also be in a North American ‘Schengen Zone’ (including at least the United States and Canada.) What butterflies would this also have? Would there be less Mexican immigration to the US? Or more because of the North American ‘Schengen Zone’
Bonus points if you still have the Mexican civil war happen.
Bonus points if you still have the Mexican civil war happen.