Article I, Section 8, Clause 8, of the United States Constitution grants Congress the enumerated power "To promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries."
The right to free trade between countries. This passage tells that the nation can open trade with other nations and can legally impose tariffs in order for the country to grow and prosper and the resources of the country can be used by the country fairly and justly with other nations and equality of trade between countries.
the sale is slaves across state line was outlawed
