All of us take it for granted, but the domestic open-border system that the Framers bequeathed to us is one remarkable achievement. Thanks to the Constitution, people are free to travel all across the country, crossing a multitude of state borders in the process, without having to encounter state border officials demanding to see identification papers. Moreover, people are free to buy goods and services from people in other states — and sell to them — without fear of tariffs, … Continue reading The Biggest Open-Border Zone in History