The foundation laid in 1787 that serves as the highest law of the United States is the United States Constitution. Drafted during the Constitutional Convention in Philadelphia, this document established the framework for the federal government and delineated the powers and responsibilities of its three branches: legislative, executive, and judicial. The Constitution also incorporates the Bill of Rights, which guarantees fundamental rights and liberties to all citizens. Ratified by the states, the Constitution has been amended 27 times, reflecting changing societal values and political needs. Serving as a symbol of democracy, the Constitution remains a cornerstone of American governance and a model for democratic frameworks worldwide.