The Constitution of the United States is the supreme law of the United States, establishing the framework for the government and its relationship with the citizens. Ratified in 1788, it outlines the structure of the federal government, dividing it into three branches: the legislative, executive, and judicial. The Constitution also includes the Bill of Rights, which comprises the first ten amendments that guarantee individual freedoms and rights, such as freedom of speech and the right to bear arms. This foundational document has been amended 27 times to address changing societal needs and values.