The Berlin Wall was a tool for oppression. It prevented people from exercising a very important right — the right to leave. In doing so it also helped ensure continuing abuse of individuals trapped by the wall and armed enforcers. In November of 1989, gates of the wall were opened for passage and people began to demolish the wall.
Move ahead almost thirty years and prominent American politicians are calling for building a wall on American borders. Republican presidential nominee Donald Trump regularly promotes building an American wall. Sen. John McCain (R-AZ), the 2008 Republican presidential nominee, even boasted in 2013 that an immigration bill he supported would create “the most militarized border since the fall of the Berlin Wall.”
The purpose many politicians offer for the desired American border wall is to block illegal immigration, not to keep people in. But, once built, such a wall can be used as a tool for oppression in a similar manner as was the Berlin Wall in East Germany.