The National Constitution is the supreme law of a country, outlining the framework of government and the rights of its citizens. It establishes the structure of government, including the roles of the executive, legislative, and judicial branches, and sets forth the principles of democracy and rule of law. In the United States, the Constitution was adopted in 1787 and has been amended 27 times. It includes the Bill of Rights, which guarantees fundamental freedoms such as speech, religion, and assembly. The Constitution serves as a guiding document for governance and protects individual liberties.