It was built to keep the people of Berlin inside the country.
I could be wrong though.
I believe the answer you're looking for is "The columbian exchange." Hope this helps.
The bill of rights came from the English Bill of rights when America was still under Britain's control. When we left Britain's control, we needed a foundation for our government to run off of. So, the founders went to work writing the Constitution. Federalists argued that the Constitution did not need a BoR. Anti-federalists refused to sign the const. without a BoR. The Bill of Rights was added and the Constitution was ratified.
A strict policy of neutrality, the United States would not entangle itself with alliances with other nations.
