Whenever a government wanted to either isolate its citizens from outside influences or prevent a foreign invasion, a wall was built. The Chinese built the longest wall on earth, Europe has had walls built around towns (medieval age) and even the early Wikings had walls around their villages. Castles were surrounded by walls to protect from “the pitchforks” and so were Christian Convents. In America, Forts were surrounded by palisades.
Building walls has always been seen as the most appropriate way of either confining or protecting people.
“Bernauer Strasse” w. wall and closed-off windows
Young boy with a toy pistol