John Locke's enlightenment was the idea natural rights which include life, liberty, and property. The purpose of the government was to protect the natural rights. The 5th and the 14th amendment reflects his idea.
True, Robert Smalls was born into slavery in South Carolina and was hired out to work on steamboats as a youth. He was born an African-American slave, and during and after the Civil War became a ship's pilot, sea captain, as well as a politician. He freed himself, his family and other slaves and convinced Lincoln to let African-American soldiers fight during the war.
The answer to the question above is Lake Superior. This is acknowledged as the world's largest freshwater lake with respect to the surface area. It is also being recognized to contain as much water as all the other Great Lakes combined.