At the dawn of the new millennium, Charles Maier popularised the idea that territoriality would eventually lose significance in a world of ever-closer economic and cultural interconnections. 1 Yet, just over two decades later, persisting conflicts in Eastern Europe and the former Soviet Union over borders and sovereigntybetween Kosovo and Serbia, Armenia and Azerbaijan, among Central Asian states in the Fergana Valley, and most prominently Ukraine's defence of its statehood and spatial integrity following Russia's full-scale invasion in February 2022have rendered Maier's prognosis questionable. 2 Across Europe, fear and hostility occasioned by the so-called migrant crisis, as well as political measures against the coronavirus pandemic, have led to a heightened awareness and reassertion of borders, to a degree previously unseen in the European Union. This resurgence of territoriality in political