People would sell slaves there along with tobacco , tea, sugar , weapons , and other goods. They would also meet up to trade belongings for better ones.
Well most of the concepts in these documents were prevalent in previous society's. Representative democracy in Athens. Basic inalienable rights was in the English Bill of Rights. But a big change was the checks and balances of government. i.e how the president can veto congress, the Supreme Court can overturn a veto, and Congress can impeach Supreme Court judges.
Immigration does not fall under the domestic policy. A domestic policy differs from foreign policy, which refers to the ways a government advances its interests in world politics.