Not at all, but expect it to be a decentralized mess, one primarily driven by conquest, or a monster born out of Habsburg alliance networks.What it says on the tin.
If you get a Franco Spanish Union in the 1500s instead of Hapsburg Spain you can easily reform the Western Roman Empire.
If I were a betting man, I wouldn't put too much money on the French and the Spanish not getting on eachothers nerves afore long.![]()
Why? They got along well enough in the 1300s and 1400s.
Not as a unified state. Where's the capital gonna be?
Political unity doesn't require extraterrestrial intervention, just competent and intelligent administration.