The U.S. Constitution, drafted in 1787, is the foundation of American democracy and governance. It created a balanced system of government with three branches and enshrined core principles like separation of powers, federalism, and popular sovereignty. The Founding Fathers, including Madison and Hamilton, designed it to protect rights and prevent tyranny. Over time, key amendments such as the Bill of Rights and the 13th and 19th Amendments expanded civil liberties. Globally, the Constitution has influenced many democratic systems, making it a landmark document in world history.