So, recently, Catalonia's been in the news for it's failed bid at independence and the subsequent dissolution of their government by the Madrid government. This isn't the first time Catalonia and Madrid have been at odds over the region's place in the Spanish nation. Their history goes back to a marriage between Queen Isabella of Spain and King Ferdinand of Aragon, which laid the foundation for Spain as a united country.
So, what if Queen Isabella and King Ferdinand of Aragon never got married, thereby preventing Spain and Aragon from uniting?