The US Constitution is the supreme law of the United States, established in 1787. It outlines the framework of the federal government, dividing it into three branches: the legislative, executive, and judicial. The Constitution also includes the Bill of Rights, which consists of the first ten amendments that guarantee individual freedoms and rights. The Constitution serves as a living document, allowing for amendments to adapt to changing societal needs. It has been amended 27 times, with significant changes addressing issues like civil rights and voting rights. The Constitution is foundational to American democracy and governance.