What principle is established by the phrase "We the People" in the Constitution?

The phrase "We the People" in the Preamble of the U.S. Constitution establishes the principle of self-governance by emphasizing that the authority of the government is derived from the consent of the governed. This statement underscores the foundational idea that the power of the government comes from the citizens rather than a monarch or a ruling elite. It reflects the democratic belief that citizens have the right to participate in the governance of their society and to make decisions about the laws and policies that affect their lives. This principle is central to the functioning of a democracy, where the government is accountable to the people and must operate with their approval and support. This notion of self-governance is critical in ensuring that the government remains responsive to the needs and rights of its citizens.