The supreme law of the United States, the Constitution is an ever-evolving document and a reflection on America values at any given time. Adopted in 1787 by the Constitutional Convention in Philadelphia, the document is a keystone of American law, and the oldest written national constitution in the world. The Constitution’s authors ensured that it was a flexible document that could be amended to match the nation’s growth, and designated its population as a unified, powerful entity in its immortal phrase, “We the People.”