To make America economically independent from other countries.
Neutrality. (Assuming that's one of your options)
The danger and difficulty in escaping from slavery are hard to imagine. Most slaves were illiterate and had no money and few, if any, possessions. The colour of their skin made them easy targets during the daylight for those who would hunt them down—often with the help of bloodhounds—and return them to their owners.
The Constitution of the United States established America's national government and fundamental laws, and guaranteed certain basic rights for its citizens.
