The Wall is the Wall: Why Fortresses Fail

https://warontherocks.com/2018/02/wall-wall-fortresses-fail/

Building a border wall may seem simplistic, or a failure to address the real adversary, but the concept of a grand defensive wall isn’t just ancient, it’s still central to the way we do all kinds security. The problem may be less with the wall itself, for what it is, and more with the fact that we keep depending too much on fortification and, by doing so, centralizing risks.