The Declaration of Independence is a historic document adopted by the Second Continental Congress on July 4, 1776. It announced the thirteen American colonies' separation from British rule, outlining their grievances against King George III and asserting their right to self-governance. The document emphasizes the principles of individual rights and the belief that all men are created equal. It articulates the idea that governments derive their power from the consent of the governed, laying the foundation for the future United States and its democratic values.