East Germany built the Berlin Wall to put a permanent stop for the
people to go or get access to the West. This happened during the Cold War when
West Berlin was considered a getaway place for people who want to escape the
rule of communism and flee into democracy that it supported.
Because the brain s so big and in so many ways unable to explain all the phenomena that occur. And unlike physical problems, psychologicalis often impossible to have in emotion and undoubtedly impossible to observe.
The main reason is that neither side was willing to compromise on the idea of taxation. The British need revenue to pay for the French and Indian War, and the colonists were upset that they had no representation in Congress. There was little-to-no room for compromise.