The Long History of High-Tech Border Policing
In the 1970s, sensors and computers turned the US–Mexico border into a testing ground for automated control.
Border Walls are Symbols of Failure
From feudal fortresses to contemporary border barriers, walls have always offered more symbolic value than real protection.
Inventing the “Illegal Alien”
What’s an illegal alien? The idea that the most important question about immigrants is their legal status is a relatively new one.
The Case for Open Borders
Is a world without borders an idea so crazy it just might work? Scholars weigh in on how open borders might solve the world's immigration problem.