The purpose of laws that followed the September 11 attacks were to keep the United States safe from terrorism and allow law enforcement to identify acts of terrorism before they happened.
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.
By fighting and winning the American Revolutionary War.
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