The United States used to allow raced based slavery in parts of the country. Today, this situation and its consequences can be seen in the demographic details that make up our nation: slavery was allowed until 1865 in the southern region of the country, predominantly in states such as Florida, Georgia, Mississippi, Alabama, Louisiana and the Carolinas. Thus, these areas had a huge African American population, used at that time as slave labor by white landowners. Today, that large percentage of black settlers in these states remains, since the descendants of those slaves have maintained their majority ethnic status in those states. Thus, states like Mississippi have 40% of their population of African American origin, while northern states, such as Vermont, reduce this percentage to 2%.
Canals cut the cost of transporting materials, improved railroads which helped the movement of heavy wagons, railroads linked manufacturing cities with different materials.
