The U.S. document that includes the phrase "We the People" is the Constitution, specifically in its Preamble. Ratified in 1788, this foundational text establishes the framework of the federal government, outlines the rights of the citizens, and articulates the principles of democracy, justice, and freedom. The phrase reflects the idea of popular sovereignty, emphasizing that the government derives its power from the consent of the governed. It serves as a significant declaration of inclusive governance, aiming to unify the diverse population of the United States under a shared set of values and rights.