One of the central contentions of my book Global Trade Advocate is that borders have grown in importance as a consequence of the economic processes accompanying the apparently border-erasing process of globalization. Here’s confirmation from the CIA
Something there is that loves a wall, perhaps. But the reasons are not always that admirable.
“Stretching over 250,000 km, the world’s 325 international land boundaries separate the 192 independent states and 73 dependencies, areas of special sovereignty, and other miscellaneous entities. Ethnicity, culture, race, religion, and language have divided states into separate political entities as much as history, physical terrain, political fiat, or conquest, resulting in sometimes arbitrary and imposed boundaries. Maritime states have claimed limits and have so far established over 130 maritime boundaries and joint development zones to allocate ocean resources and to provide for national security at sea … Other sources of contention include access to water and mineral (especially petroleum) resources, fisheries, and arable land … Regional discord directly affects the sustenance and welfare of local populations, often leaving the world community to cope with resultant refugees, hunger, disease, impoverishment, deforestation, and desertification” CIA World Factbook