The revolutionary document that proclaimed the rights of citizens and established government principles in the U.S. is the Declaration of Independence, adopted on July 4, 1776. Authored primarily by Thomas Jefferson, the document outlines the colonies' grievances against King George III and asserts the inherent rights of individuals to life, liberty, and the pursuit of happiness. It emphasizes the notion of government deriving its power from the consent of the governed, asserting the right of the people to alter or abolish oppressive governments. The Declaration became a foundational text for American ideals of democracy and human rights, influencing future democratic movements worldwide.