Necessary Evil: Visas part II

Think about it this way: how reasonable would it be to require citizens to carry passports just to travel between districts or cities within their own country? Imagine the friction, and the disparities in quality of life. By that logic, someone from Kathmandu could move freely across more than half of Nepal while someone of equal economic standing from Surkhet could not. How absurd would it sound for a New Yorker to need a passport to visit New Jersey or California? So how are nations really any different from cities when it comes to travel and migration? And if they are different, why do unions like the EU and the Schengen Area exist at all? I hold the radical view that visas, and the deliberate bureaucratic walls behind them, run against human nature. I tend to see them as an under-reported form of human rights violation, precisely because they fail to account for the moral failures of colonization and the asymmetrical resource extraction carried out by a powerful minority.