"How Transportation Technologies Shaped Empires" : https://unchartedterritories.tomaspueyo.com/p/transportation-tech-shaped-empires Axiom: an empire cannot be more than 1 month away from it's subjects. From my corner of the Empire, I sit and laugh at the "Schengen" vs "Not Schengen" discussions with the fringe of the Empire. On the one hand do you know why they took us, Romania, into EU? Would be shameful to lose 2000 years of Latin colonization to Slavs, Turks or Chinese. On the other hand...